Emile Agbangba - Academia.edu (original) (raw)
Papers by Emile Agbangba
African Journal of Applied Statistics
Demographic pressure and climate change have heavily affected soil fertility. Proper soil managem... more Demographic pressure and climate change have heavily affected soil fertility. Proper soil management requires the understanding of the spatial variation of soil properties. In this study, Bayesian maximum Entropy (BME) was used to explore the variation of soil pH and soil organic matter (SOM) at Adingningon (Benin) using 106 soil samples. The predicting maps indicated a lower concentration (0.6 to 0.8g/kg) of SOM toward the center and pH mostly around 5.8 to 6.5 with lower error variance, suggesting an acidic soil. This results provide useful information for managing soil fertility to improve crop yields.\\
Ethnobiology Letters
Agricultural diversification with neglected and underutilized species is a viable way to sustaina... more Agricultural diversification with neglected and underutilized species is a viable way to sustainably increase the productivity of agrosystems. Understanding the social, cultural, and ecological roles of these species is crucial for their promotion. White fonio (<em>Digitaria exilis</em>), a neglected cereal endemic to West African Sahelian countries, is recognized as a crop for the future due to its cultural, nutritional, and economic values. In this study, we described fonio farming systems in Senegal through an ethnobotanical approach. As expected in family farming systems, farmers largely practiced diversified subsistence agriculture on small plots and relied on local seed exchange networks. The importance of fonio varied among agroecological zones, ethnic groups, and gender. In the Groundnut Basin, where agriculture is more mechanized, late-maturing landraces of fonio are cultivated as a cash crop rather than a staple crop. However, in southern Senegal, where food sh...
Agronomy
Heterogeneity in pineapple fruit quality explains the low export volume of fruits from Benin to i... more Heterogeneity in pineapple fruit quality explains the low export volume of fruits from Benin to international markets. This work aims to investigate the influences of residues mulching or burying and N-K fertilization on (1) fresh fruit juice quality and the proportion of fruit meeting European standards and (2) fruit acceptability for fresh local consumption, as well as to identify morphological characteristics most related to fruit chemical quality attributes. The experimental design was a split-plot with three replications, where the main factor was N-K fertilization (
ABSTRACT Le Système Intégré de Diagnostic et de Recommandation (DRIS), et la Méthode de la Valeur... more ABSTRACT Le Système Intégré de Diagnostic et de Recommandation (DRIS), et la Méthode de la Valeur Critique (CVM) ont été utilisés pour évaluer le statut nutritionnel de la variété ‘‘Cayenne lisse’’ d’ananas (Ananas comosus (L.) Merr) sur un sol ferralitique faiblement désaturé dans la Commune d’Allada, située dans le Département de l’Atlantique au Sud-Bénin. L’étude vise à: comparer DRIS et la CVM, établir les normes DRIS pour cette variété d’ananas et en évaluer les pratiques actuelles de fertilisation. La population de rendement a été subdivisée en sous-population de rendements élevés (> 87,9 t.ha-1) d’effectif 24 et sous-population de rendements faibles (< 87,9 t.ha-1) de taille 36 en utilisant la moyenne additionnée à l’intervalle de confiance comme séparateurs de rendements. Les résultats d’analyses foliaires ont été comparés aux normes préexistantes pour les deux méthodes. Les résultats montrent que les deux méthodes permettent de faire des diagnostics fiables pour le S, Mg, Ca et Zn pour cette variété d’ananas. Cependant, alors que le DRIS décèle avec fiabilité un excès de N et K sur la "Cayenne lisse", la CVM détecte une déficience en N et K. Par conséquent, la méthode DRIS accroît la précision dans le diagnostic par rapport à la CVM. Mots clés : CVM, DRIS, indice de nutriments.
International Journal of Current Research
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple 'Perola' for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for 'Perola' pineapple growing in plantations Allada district (Benin) are presented. DRIS norms were established from a data bank of leaf nutrient concentration (N, P, K, Ca, Mg and Zn) and fruit yield with 60 samples gathered from farmers' plantations. The data were divided into high-yielding (>66.7 t/ha) and low-yielding (<66.7 t/ha) subpopulations and norms were computed using standard DRIS procedures. These norms were developed with data from only one cropping region, so they should be considered as preliminary, probably requiring some modification as more data become available. The norms were significantly different from those presented in the literature, except for N/K whose value is similar to the existing norm. We conclude that our results revealed that DRIS norms depend on pineapple cultivar.
Asian Journal of Scientific Research
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple ‘Smooth Cayenne’ for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for ‘Smooth Cayenne’ pineapple growing in plantations of the township of Allada (Benin) are presented. DRIS norms were established from a data bank of leaf nutrient concentration (N, P, K, Ca, Mg, S and Zn)and fruit yield with 60 samples gathered from farmers’ plantations. The data were divided into high-yielding (>88 t/ha) and low-yielding (<88 t/ha) sub-populations and norms were computed using standard DRIS procedures. These norms were developed with data from only one cropping region, so they should be considered as preliminary,probably requiring some modification as more data become available. The norms were signifi...
Universal Journal of Plant Science, 2015
The response of cowpea [Vigna unguiculata (Walp. (L.)] to inoculation with symbiotic microorganis... more The response of cowpea [Vigna unguiculata (Walp. (L.)] to inoculation with symbiotic microorganisms (arbuscular mycorrhizal fungus and rhizobium) was investigated on cultivated vertisoils (known locally as Dek) and arenosoils (known locally as Dior) in three geographic sites in Senegal. On the basis of soil physico-chemical characteristics, of most probable number (MPN) of indigenous rhizobia and of yields, a hierarchical analysis showed that the sites were grouped in three clusters. Some soils initially considered as Dek were grouped with Dior, so that all of Dior soils were grouped in the same cluster. No significant increasing in shoot biomass or yield was observed when cowpea was inoculated with fungi alone, whatever soil type. However, a significant or noticeable improvement in cowpea seeds production was obtained by rhizobium inoculation. It appeared that cowpea response to inoculation depended on geographical site and were often observed in sandy arenosoils (Dior type) or in loamy sand vertisoils (Dek type) with at least 15mgkg -1 of available phosphorus level.
African journal of agricultural research
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple ‘Perola’ for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for ‘Perola’ pineapple growing in plantations Allada district (Benin) are presented. DRIS norms were established from a data bank of leaf nutrient concentration (N, P, K, Ca, Mg and Zn) and fruit yield with 60 samples gathered from farmers’ plantations. The data were divided into high-yielding (>66.7 t/ha) and low-yielding (<66.7 t/ha) subpopulations and norms were computed using standard DRIS procedures. These norms were developed with data from only one cropping region, so they should be considered as preliminary, probably requiring some modification as more data become available. The norms were significantly different from th...
A thorough and extensive germplasm exploration survey was undertaken during 2009 and 2010 to asse... more A thorough and extensive germplasm exploration survey was undertaken during 2009 and 2010 to assess the distribution and variability in seed traits of Jatropha curcas L. in Senegal. Nineteen accessions from different agro ecological zones of the country were collected to evaluate variability in seed characters. Trees aged at least 5 years only were considered. Among the seed traits studied, 100 seed weight ranged from 63.68 to 77.83 g and seed length from 17.89 to 19.15 mm. The highest 100 seed weight (77.83 g) was recorded for the accession Jc-16 collected from Mampatim. Accessions from Soudanian zone showed high values of seed traits while low seed traits were recorded in Soudano- Sahelian zone. Variability in seed traits was not linked to geographic location. Old plantations of Jatropha curcas are spread in the central, south and coastal zones of Senegal where the species is well known by the populations. However, the species was least represented above 400 mm isohyet and unfamil...
International Journal of Biological and Chemical Sciences, 2011
ABSTRACT Le Système Intégré de Diagnostic et de Recommandation (DRIS), et la Méthode de la Valeur... more ABSTRACT Le Système Intégré de Diagnostic et de Recommandation (DRIS), et la Méthode de la Valeur Critique (CVM) ont été utilisés pour évaluer le statut nutritionnel de la variété ‘‘Cayenne lisse’’ d’ananas (Ananas comosus (L.) Merr) sur un sol ferralitique faiblement désaturé dans la Commune d’Allada, située dans le Département de l’Atlantique au Sud-Bénin. L’étude vise à: comparer DRIS et la CVM, établir les normes DRIS pour cette variété d’ananas et en évaluer les pratiques actuelles de fertilisation. La population de rendement a été subdivisée en sous-population de rendements élevés (> 87,9 t.ha-1) d’effectif 24 et sous-population de rendements faibles (< 87,9 t.ha-1) de taille 36 en utilisant la moyenne additionnée à l’intervalle de confiance comme séparateurs de rendements. Les résultats d’analyses foliaires ont été comparés aux normes préexistantes pour les deux méthodes. Les résultats montrent que les deux méthodes permettent de faire des diagnostics fiables pour le S, Mg, Ca et Zn pour cette variété d’ananas. Cependant, alors que le DRIS décèle avec fiabilité un excès de N et K sur la "Cayenne lisse", la CVM détecte une déficience en N et K. Par conséquent, la méthode DRIS accroît la précision dans le diagnostic par rapport à la CVM. Mots clés : CVM, DRIS, indice de nutriments.
AFRICAN JOURNAL OF AGRICULTURAL RESEEARCH, 2011
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple 'Perola' for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for 'Perola' pineapple growing in plantations Allada district (Benin) are presented. DRIS norms were established from a data bank of leaf nutrient concentration (N, P, K, Ca, Mg and Zn) and fruit yield with 60 samples gathered from farmers' plantations. The data were divided into high-yielding (>66.7 t/ha) and low-yielding (<66.7 t/ha) subpopulations and norms were computed using standard DRIS procedures. These norms were developed with data from only one cropping region, so they should be considered as preliminary, probably requiring some modification as more data become available. The norms were significantly different from those presented in the literature, except for N/K whose value is similar to the existing norm. We conclude that our results revealed that DRIS norms depend on pineapple cultivar.
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple ‘Smooth Cayenne’ for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for ‘Smooth Cayenne’ pineapple growing in plantations of
The aims of this study were to test a new mycorrhizal inoculation process using a "catalyser" of ... more The aims of this study were to test a new mycorrhizal inoculation process using a "catalyser" of the mycorrhizal establishment (termite mounds of Macrotermes subhyalinus) to minimize the requested volume of fungal inoculum added to the cultural substrate. The effects of the termite mound were explored on mycorrhiza formation between an Australian Acacia, Acacia holosericea and an ectomycorrhizal fungus or an arbuscular mycorrhizal fungus using a two-step cultural system. The first step of this cultural practice was the inoculation of A. holosericea seedlings in small soil volumes (5 L plastic containers planted with 100 pre-germinated seeds) whereas the second one allowed the development of these mycorrhized plants in larger soil volumes (1 L pots planted with one seedling). Termite mound amendment significantly enhanced the mycorrhizal formation from both types of fungal isolates. This stimulating effect could probably be attributed to the introduction via the termite mound of a bacterial group (that is, fluorescent pseudomonads) that could act as Mycorrhiza Helper Bacteria (MHB). Since it is possible to reduce the requested fungal inoculum in controlled mycorrhization practice using M. subhyalinus mound powders, this biotechnological process could be useful in reafforestation of tropical regions by lowering the requested fungal inoculum quantities and reducing the financial costs of controlled mycorrhization in forest nurseries.
American Journal of Plant Sciences, 2014
This study aims at quantifying the most important ecosystem services: forage production, timber p... more This study aims at quantifying the most important ecosystem services: forage production, timber production and carbon sequestration provided by Pterocarpus lucens to local communities of Ferlo Biosphere Reserve. The results suggested that the ecological structure of Pterocarpus lucens revealed a bell-shaped form with left dissymmetric distribution indicating a predominance of individuals with small circumference and height. A regression using the software Minitab 16, with circumference and the height as explanatory variables, has allowed a development of predictive models for the estimation of the produced forage and the quantification of the timber supplied by one of the most used plant species in Sahelian pastures. Forage production of Pterocarpus lucens was estimated at 178 kg DM/ha. This large value of forage showed the predominance of this species in animal feed in the Sahel. The quantity of wood produced was 545 kg DM/ha while the quantity of above ground sequestered carbon was 325.35 kg of C/ha. Those estimations are interesting in the implementation context of the Ferlo Biosphere Reserve which aims at matching the productive capacity of ecosystems with the needs of local communities.
American Journal of Plant Sciences, 2013
The development of equations to predict tree height, crown diameter, crown depth from stem diamet... more The development of equations to predict tree height, crown diameter, crown depth from stem diameter of a tree species enables arborists, researchers, and urban forest managers to model costs and benefits, analyze alternative management scenarios, and determine the best management practices for sustainable forests. The objective of this study was to develop regression prediction models for tree age, tree height, crown diameter, crown ratio and crown depth for A. senegal growing in Ferlo, in the northern Senegal. Four plantations of different years old (ISRA, 10 years old plantations, Ndodj, 8 years old plantations, Boulal, 5 years old plantations and Déali, 4 years old plantations) were selected. The following dendometric variables: crown height, crown diameter, stem diameter at the breast height, stem basal diameter (at 0.30 m) and the height from the tree base to first branch were measured on a total of 489 trees. The results suggested that the ecological structure of the different year old A. Senegal plantation revealed a bell-shaped form with left dissymmetric distribution indicating a predominance of individuals with small diameter at breast height. Allometry study of A. Senegal showed highly significant positive correlations (p = 0.00) between stem diameter at breast height, stem basal diameter, tree height, crown diameter and crown depth. Positive correlations were also found between crown diameter, tree height and crown height. Prediction models derived from these relationships can be used to estimate the tree height, stem diameter at breast height and crown depth from crown diameter with greater precision. As for A. Senegal age estimation, the established model is not strong as it can explain only 49.1% of the age variation. Total 488 3569.98
American Journal of Plant Sciences, 2013
The residual effects of sucrose concentrations (80 or 100 g·L −1 ) and hormonal treatments (BAP +... more The residual effects of sucrose concentrations (80 or 100 g·L −1 ) and hormonal treatments (BAP + Kinetin or Coumarin) of tuberization medium on in vitro microtubers germination of three potato varieties (Solanum tuberosum L.) so called Aida, Atlas and Odessa, are described. After 3 weeks of incubation at 28˚C ± 1˚C, 70% of Aida microtubers variety, previously formed in the MT2 medium [MS/2 + 80 g·L −1 Sucrose], germinated. The best germination rate for varieties Atlas (100%) and Odessa (66.66%) was obtained on microtubers previously formed in the medium MT2 [MS/2 + 100 g·L −1 Sucrose]. The addition of hormones in the tuberization medium allowed optimizing the microtubers germination of the Aida variety unlike the other varieties. Indeed, for the Aida variety, the combination M5 [Kin 2.5 mg·L −1 + Coum 0.025 mg·L −1 + Sucrose 80 g·L −1 ] increased the germination rate from 70% up to 93.33%. The best germination rate (90%), noticed with microtubers of Atlas variety, initially formed in M2 medium [Kin 1 mg·L −1 + BAP 1 mg·L −1 + Sucrose 100 g·L −1 ], was lower than that one (100%) obtained on medium without hormones. For Odessa variety, the maximum germination rate (53.33%) of microtubers, from the medium M4 [Kin 2.5 mg·L −1 + BAP 1 mg·L −1 + Sucrose 100 g·L −1 ], was also lower than that one (66.66%) observed in the medium without hormones. Aida and Atlas varieties thus offer a better germination rate than Odessa after their cold storage.
Open Journal of Animal Sciences, 2014
The purpose of this study carried out in the township of Dahra was to access the effect of dry se... more The purpose of this study carried out in the township of Dahra was to access the effect of dry season protein and mineral supplementation of Gobra and Crossbreed Guzerat cows on milk production. The experimental design is a completely randomized block. The treatments were: supplement of molasse-urea blocks with supplement of hay; supplement of molasse-urea blocks without any hay; no supplement of molasse-urea blocks and supplement of hay; no supplement of molasse-urea block without any hay. For each breed, the treatments were replicated three times on a lot of cows with the similar zootechnic parameters. A total of twelve lactating cows per breed were then used. The supplement of block + hay has significantly (p < 5%) allowed obtaining the largest average daily quantity of milk: 1.9 ± 0.7L/day/cow and 2.4 ± 0.8 L/day/cow respectively in Gobra and Crossbreed Gobra*Guzerat. The increases in production compared to the control treatment (without supplement) are 52.63% and 100% respectively in the breed Gobra and Gobra*Guzerat. The supplement of hay comes in the second place and contributes to an additional production of 66.66% in both breeds of cow. Then, the supplement of block follows and it allows increasing the production of 44.44% and 50% respectively in Gobra and Crossbreed. In both races, the supplement of block + hay has allowed obtain-ing the highest profits of 1.6/L/day/cowforGobraand1.6/L/day/cow for Gobra and 1.6/L/day/cowforGobraand 2.8/L/day/cow for the Crossbreed, that equals to an increase by $ 0.3 and $ 0.9 compared to the control treatment. The supplement of hay and the block supplement have respectively given a profit of 0.4 and $ 0.3/L/day/cow in Gobra and 0.6 and $ 0.4/L/day/cow in the Crossbreed. The adoption of supplementation molasse-urea block + hay by producers appears an alternative to boost milk production in dry season.
Advances in Bioscience and Biotechnology, 2014
African Journal of Applied Statistics
Demographic pressure and climate change have heavily affected soil fertility. Proper soil managem... more Demographic pressure and climate change have heavily affected soil fertility. Proper soil management requires the understanding of the spatial variation of soil properties. In this study, Bayesian maximum Entropy (BME) was used to explore the variation of soil pH and soil organic matter (SOM) at Adingningon (Benin) using 106 soil samples. The predicting maps indicated a lower concentration (0.6 to 0.8g/kg) of SOM toward the center and pH mostly around 5.8 to 6.5 with lower error variance, suggesting an acidic soil. This results provide useful information for managing soil fertility to improve crop yields.\\
Ethnobiology Letters
Agricultural diversification with neglected and underutilized species is a viable way to sustaina... more Agricultural diversification with neglected and underutilized species is a viable way to sustainably increase the productivity of agrosystems. Understanding the social, cultural, and ecological roles of these species is crucial for their promotion. White fonio (<em>Digitaria exilis</em>), a neglected cereal endemic to West African Sahelian countries, is recognized as a crop for the future due to its cultural, nutritional, and economic values. In this study, we described fonio farming systems in Senegal through an ethnobotanical approach. As expected in family farming systems, farmers largely practiced diversified subsistence agriculture on small plots and relied on local seed exchange networks. The importance of fonio varied among agroecological zones, ethnic groups, and gender. In the Groundnut Basin, where agriculture is more mechanized, late-maturing landraces of fonio are cultivated as a cash crop rather than a staple crop. However, in southern Senegal, where food sh...
Agronomy
Heterogeneity in pineapple fruit quality explains the low export volume of fruits from Benin to i... more Heterogeneity in pineapple fruit quality explains the low export volume of fruits from Benin to international markets. This work aims to investigate the influences of residues mulching or burying and N-K fertilization on (1) fresh fruit juice quality and the proportion of fruit meeting European standards and (2) fruit acceptability for fresh local consumption, as well as to identify morphological characteristics most related to fruit chemical quality attributes. The experimental design was a split-plot with three replications, where the main factor was N-K fertilization (
ABSTRACT Le Système Intégré de Diagnostic et de Recommandation (DRIS), et la Méthode de la Valeur... more ABSTRACT Le Système Intégré de Diagnostic et de Recommandation (DRIS), et la Méthode de la Valeur Critique (CVM) ont été utilisés pour évaluer le statut nutritionnel de la variété ‘‘Cayenne lisse’’ d’ananas (Ananas comosus (L.) Merr) sur un sol ferralitique faiblement désaturé dans la Commune d’Allada, située dans le Département de l’Atlantique au Sud-Bénin. L’étude vise à: comparer DRIS et la CVM, établir les normes DRIS pour cette variété d’ananas et en évaluer les pratiques actuelles de fertilisation. La population de rendement a été subdivisée en sous-population de rendements élevés (> 87,9 t.ha-1) d’effectif 24 et sous-population de rendements faibles (< 87,9 t.ha-1) de taille 36 en utilisant la moyenne additionnée à l’intervalle de confiance comme séparateurs de rendements. Les résultats d’analyses foliaires ont été comparés aux normes préexistantes pour les deux méthodes. Les résultats montrent que les deux méthodes permettent de faire des diagnostics fiables pour le S, Mg, Ca et Zn pour cette variété d’ananas. Cependant, alors que le DRIS décèle avec fiabilité un excès de N et K sur la "Cayenne lisse", la CVM détecte une déficience en N et K. Par conséquent, la méthode DRIS accroît la précision dans le diagnostic par rapport à la CVM. Mots clés : CVM, DRIS, indice de nutriments.
International Journal of Current Research
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple 'Perola' for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for 'Perola' pineapple growing in plantations Allada district (Benin) are presented. DRIS norms were established from a data bank of leaf nutrient concentration (N, P, K, Ca, Mg and Zn) and fruit yield with 60 samples gathered from farmers' plantations. The data were divided into high-yielding (>66.7 t/ha) and low-yielding (<66.7 t/ha) subpopulations and norms were computed using standard DRIS procedures. These norms were developed with data from only one cropping region, so they should be considered as preliminary, probably requiring some modification as more data become available. The norms were significantly different from those presented in the literature, except for N/K whose value is similar to the existing norm. We conclude that our results revealed that DRIS norms depend on pineapple cultivar.
Asian Journal of Scientific Research
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple ‘Smooth Cayenne’ for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for ‘Smooth Cayenne’ pineapple growing in plantations of the township of Allada (Benin) are presented. DRIS norms were established from a data bank of leaf nutrient concentration (N, P, K, Ca, Mg, S and Zn)and fruit yield with 60 samples gathered from farmers’ plantations. The data were divided into high-yielding (>88 t/ha) and low-yielding (<88 t/ha) sub-populations and norms were computed using standard DRIS procedures. These norms were developed with data from only one cropping region, so they should be considered as preliminary,probably requiring some modification as more data become available. The norms were signifi...
Universal Journal of Plant Science, 2015
The response of cowpea [Vigna unguiculata (Walp. (L.)] to inoculation with symbiotic microorganis... more The response of cowpea [Vigna unguiculata (Walp. (L.)] to inoculation with symbiotic microorganisms (arbuscular mycorrhizal fungus and rhizobium) was investigated on cultivated vertisoils (known locally as Dek) and arenosoils (known locally as Dior) in three geographic sites in Senegal. On the basis of soil physico-chemical characteristics, of most probable number (MPN) of indigenous rhizobia and of yields, a hierarchical analysis showed that the sites were grouped in three clusters. Some soils initially considered as Dek were grouped with Dior, so that all of Dior soils were grouped in the same cluster. No significant increasing in shoot biomass or yield was observed when cowpea was inoculated with fungi alone, whatever soil type. However, a significant or noticeable improvement in cowpea seeds production was obtained by rhizobium inoculation. It appeared that cowpea response to inoculation depended on geographical site and were often observed in sandy arenosoils (Dior type) or in loamy sand vertisoils (Dek type) with at least 15mgkg -1 of available phosphorus level.
African journal of agricultural research
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple ‘Perola’ for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for ‘Perola’ pineapple growing in plantations Allada district (Benin) are presented. DRIS norms were established from a data bank of leaf nutrient concentration (N, P, K, Ca, Mg and Zn) and fruit yield with 60 samples gathered from farmers’ plantations. The data were divided into high-yielding (>66.7 t/ha) and low-yielding (<66.7 t/ha) subpopulations and norms were computed using standard DRIS procedures. These norms were developed with data from only one cropping region, so they should be considered as preliminary, probably requiring some modification as more data become available. The norms were significantly different from th...
A thorough and extensive germplasm exploration survey was undertaken during 2009 and 2010 to asse... more A thorough and extensive germplasm exploration survey was undertaken during 2009 and 2010 to assess the distribution and variability in seed traits of Jatropha curcas L. in Senegal. Nineteen accessions from different agro ecological zones of the country were collected to evaluate variability in seed characters. Trees aged at least 5 years only were considered. Among the seed traits studied, 100 seed weight ranged from 63.68 to 77.83 g and seed length from 17.89 to 19.15 mm. The highest 100 seed weight (77.83 g) was recorded for the accession Jc-16 collected from Mampatim. Accessions from Soudanian zone showed high values of seed traits while low seed traits were recorded in Soudano- Sahelian zone. Variability in seed traits was not linked to geographic location. Old plantations of Jatropha curcas are spread in the central, south and coastal zones of Senegal where the species is well known by the populations. However, the species was least represented above 400 mm isohyet and unfamil...
International Journal of Biological and Chemical Sciences, 2011
ABSTRACT Le Système Intégré de Diagnostic et de Recommandation (DRIS), et la Méthode de la Valeur... more ABSTRACT Le Système Intégré de Diagnostic et de Recommandation (DRIS), et la Méthode de la Valeur Critique (CVM) ont été utilisés pour évaluer le statut nutritionnel de la variété ‘‘Cayenne lisse’’ d’ananas (Ananas comosus (L.) Merr) sur un sol ferralitique faiblement désaturé dans la Commune d’Allada, située dans le Département de l’Atlantique au Sud-Bénin. L’étude vise à: comparer DRIS et la CVM, établir les normes DRIS pour cette variété d’ananas et en évaluer les pratiques actuelles de fertilisation. La population de rendement a été subdivisée en sous-population de rendements élevés (> 87,9 t.ha-1) d’effectif 24 et sous-population de rendements faibles (< 87,9 t.ha-1) de taille 36 en utilisant la moyenne additionnée à l’intervalle de confiance comme séparateurs de rendements. Les résultats d’analyses foliaires ont été comparés aux normes préexistantes pour les deux méthodes. Les résultats montrent que les deux méthodes permettent de faire des diagnostics fiables pour le S, Mg, Ca et Zn pour cette variété d’ananas. Cependant, alors que le DRIS décèle avec fiabilité un excès de N et K sur la "Cayenne lisse", la CVM détecte une déficience en N et K. Par conséquent, la méthode DRIS accroît la précision dans le diagnostic par rapport à la CVM. Mots clés : CVM, DRIS, indice de nutriments.
AFRICAN JOURNAL OF AGRICULTURAL RESEEARCH, 2011
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple 'Perola' for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for 'Perola' pineapple growing in plantations Allada district (Benin) are presented. DRIS norms were established from a data bank of leaf nutrient concentration (N, P, K, Ca, Mg and Zn) and fruit yield with 60 samples gathered from farmers' plantations. The data were divided into high-yielding (>66.7 t/ha) and low-yielding (<66.7 t/ha) subpopulations and norms were computed using standard DRIS procedures. These norms were developed with data from only one cropping region, so they should be considered as preliminary, probably requiring some modification as more data become available. The norms were significantly different from those presented in the literature, except for N/K whose value is similar to the existing norm. We conclude that our results revealed that DRIS norms depend on pineapple cultivar.
Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through e... more Nutritional diagnosis is an important tool for increasing fruit yield and fruit quality through efficient fertilization management. The aim of the study is to investigate whether there are specific DRIS norms for pineapple ‘Smooth Cayenne’ for a better soil fertility management in Benin. A preliminary Diagnosis and Recommendation Integrated System (DRIS) norms for ‘Smooth Cayenne’ pineapple growing in plantations of
The aims of this study were to test a new mycorrhizal inoculation process using a "catalyser" of ... more The aims of this study were to test a new mycorrhizal inoculation process using a "catalyser" of the mycorrhizal establishment (termite mounds of Macrotermes subhyalinus) to minimize the requested volume of fungal inoculum added to the cultural substrate. The effects of the termite mound were explored on mycorrhiza formation between an Australian Acacia, Acacia holosericea and an ectomycorrhizal fungus or an arbuscular mycorrhizal fungus using a two-step cultural system. The first step of this cultural practice was the inoculation of A. holosericea seedlings in small soil volumes (5 L plastic containers planted with 100 pre-germinated seeds) whereas the second one allowed the development of these mycorrhized plants in larger soil volumes (1 L pots planted with one seedling). Termite mound amendment significantly enhanced the mycorrhizal formation from both types of fungal isolates. This stimulating effect could probably be attributed to the introduction via the termite mound of a bacterial group (that is, fluorescent pseudomonads) that could act as Mycorrhiza Helper Bacteria (MHB). Since it is possible to reduce the requested fungal inoculum in controlled mycorrhization practice using M. subhyalinus mound powders, this biotechnological process could be useful in reafforestation of tropical regions by lowering the requested fungal inoculum quantities and reducing the financial costs of controlled mycorrhization in forest nurseries.
American Journal of Plant Sciences, 2014
This study aims at quantifying the most important ecosystem services: forage production, timber p... more This study aims at quantifying the most important ecosystem services: forage production, timber production and carbon sequestration provided by Pterocarpus lucens to local communities of Ferlo Biosphere Reserve. The results suggested that the ecological structure of Pterocarpus lucens revealed a bell-shaped form with left dissymmetric distribution indicating a predominance of individuals with small circumference and height. A regression using the software Minitab 16, with circumference and the height as explanatory variables, has allowed a development of predictive models for the estimation of the produced forage and the quantification of the timber supplied by one of the most used plant species in Sahelian pastures. Forage production of Pterocarpus lucens was estimated at 178 kg DM/ha. This large value of forage showed the predominance of this species in animal feed in the Sahel. The quantity of wood produced was 545 kg DM/ha while the quantity of above ground sequestered carbon was 325.35 kg of C/ha. Those estimations are interesting in the implementation context of the Ferlo Biosphere Reserve which aims at matching the productive capacity of ecosystems with the needs of local communities.
American Journal of Plant Sciences, 2013
The development of equations to predict tree height, crown diameter, crown depth from stem diamet... more The development of equations to predict tree height, crown diameter, crown depth from stem diameter of a tree species enables arborists, researchers, and urban forest managers to model costs and benefits, analyze alternative management scenarios, and determine the best management practices for sustainable forests. The objective of this study was to develop regression prediction models for tree age, tree height, crown diameter, crown ratio and crown depth for A. senegal growing in Ferlo, in the northern Senegal. Four plantations of different years old (ISRA, 10 years old plantations, Ndodj, 8 years old plantations, Boulal, 5 years old plantations and Déali, 4 years old plantations) were selected. The following dendometric variables: crown height, crown diameter, stem diameter at the breast height, stem basal diameter (at 0.30 m) and the height from the tree base to first branch were measured on a total of 489 trees. The results suggested that the ecological structure of the different year old A. Senegal plantation revealed a bell-shaped form with left dissymmetric distribution indicating a predominance of individuals with small diameter at breast height. Allometry study of A. Senegal showed highly significant positive correlations (p = 0.00) between stem diameter at breast height, stem basal diameter, tree height, crown diameter and crown depth. Positive correlations were also found between crown diameter, tree height and crown height. Prediction models derived from these relationships can be used to estimate the tree height, stem diameter at breast height and crown depth from crown diameter with greater precision. As for A. Senegal age estimation, the established model is not strong as it can explain only 49.1% of the age variation. Total 488 3569.98
American Journal of Plant Sciences, 2013
The residual effects of sucrose concentrations (80 or 100 g·L −1 ) and hormonal treatments (BAP +... more The residual effects of sucrose concentrations (80 or 100 g·L −1 ) and hormonal treatments (BAP + Kinetin or Coumarin) of tuberization medium on in vitro microtubers germination of three potato varieties (Solanum tuberosum L.) so called Aida, Atlas and Odessa, are described. After 3 weeks of incubation at 28˚C ± 1˚C, 70% of Aida microtubers variety, previously formed in the MT2 medium [MS/2 + 80 g·L −1 Sucrose], germinated. The best germination rate for varieties Atlas (100%) and Odessa (66.66%) was obtained on microtubers previously formed in the medium MT2 [MS/2 + 100 g·L −1 Sucrose]. The addition of hormones in the tuberization medium allowed optimizing the microtubers germination of the Aida variety unlike the other varieties. Indeed, for the Aida variety, the combination M5 [Kin 2.5 mg·L −1 + Coum 0.025 mg·L −1 + Sucrose 80 g·L −1 ] increased the germination rate from 70% up to 93.33%. The best germination rate (90%), noticed with microtubers of Atlas variety, initially formed in M2 medium [Kin 1 mg·L −1 + BAP 1 mg·L −1 + Sucrose 100 g·L −1 ], was lower than that one (100%) obtained on medium without hormones. For Odessa variety, the maximum germination rate (53.33%) of microtubers, from the medium M4 [Kin 2.5 mg·L −1 + BAP 1 mg·L −1 + Sucrose 100 g·L −1 ], was also lower than that one (66.66%) observed in the medium without hormones. Aida and Atlas varieties thus offer a better germination rate than Odessa after their cold storage.
Open Journal of Animal Sciences, 2014
The purpose of this study carried out in the township of Dahra was to access the effect of dry se... more The purpose of this study carried out in the township of Dahra was to access the effect of dry season protein and mineral supplementation of Gobra and Crossbreed Guzerat cows on milk production. The experimental design is a completely randomized block. The treatments were: supplement of molasse-urea blocks with supplement of hay; supplement of molasse-urea blocks without any hay; no supplement of molasse-urea blocks and supplement of hay; no supplement of molasse-urea block without any hay. For each breed, the treatments were replicated three times on a lot of cows with the similar zootechnic parameters. A total of twelve lactating cows per breed were then used. The supplement of block + hay has significantly (p < 5%) allowed obtaining the largest average daily quantity of milk: 1.9 ± 0.7L/day/cow and 2.4 ± 0.8 L/day/cow respectively in Gobra and Crossbreed Gobra*Guzerat. The increases in production compared to the control treatment (without supplement) are 52.63% and 100% respectively in the breed Gobra and Gobra*Guzerat. The supplement of hay comes in the second place and contributes to an additional production of 66.66% in both breeds of cow. Then, the supplement of block follows and it allows increasing the production of 44.44% and 50% respectively in Gobra and Crossbreed. In both races, the supplement of block + hay has allowed obtain-ing the highest profits of 1.6/L/day/cowforGobraand1.6/L/day/cow for Gobra and 1.6/L/day/cowforGobraand 2.8/L/day/cow for the Crossbreed, that equals to an increase by $ 0.3 and $ 0.9 compared to the control treatment. The supplement of hay and the block supplement have respectively given a profit of 0.4 and $ 0.3/L/day/cow in Gobra and 0.6 and $ 0.4/L/day/cow in the Crossbreed. The adoption of supplementation molasse-urea block + hay by producers appears an alternative to boost milk production in dry season.
Advances in Bioscience and Biotechnology, 2014