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Papers by NIKOLAOS CHOULIARAS
Le Centre pour la Communication Scientifique Directe - HAL - Inria, 2012
An assessment of a fertilization management practice for exploitation of soil salts was made in a... more An assessment of a fertilization management practice for exploitation of soil salts was made in a four successive greenhouse cucumber crops. Only an organic commercial fertilizer in the form of black peat moss slightly enriched with inorganic elements was embedded basically, while during crop, a fertigation program was planned based on soil salinity level. This work confirmed that the plant need for nutrients might be covered largely by soil salts. The basic application of the organic fertilizer in relation to fertigation program applied during of crops period led to a reduced soil electrical conductivity from 0.66 to 0.24, 0.58 to 0.24, 0.80 to 0.49 and 0.55 to 0.39 dS/m respectively (soil extract of 1soil: 5 H 2 O). Significant increase in soil salinity was observed after soil solarization, in the first and second crops (EC 1,23 dS/m and EC 0.48 dS/m), however, not observed increase in soil salinity(EC 0.44 dS/m and EC 0.41 dS/m) after soil solarization for the third and the fourth crop. Then, excessive salinity levels in soil should be taken into account when fertilization management of cultural practices in successive crops is applied.
Food Science and Technology International, 2011
Essential oils (EOs) extracted by hydrodistillation from leaf parts of Algerian Eucalyptus globul... more Essential oils (EOs) extracted by hydrodistillation from leaf parts of Algerian Eucalyptus globulus, Myrtus communis and Satureja hortensis were analyzed by gas chromatography/mass spectrometry (GC/MS). The main components of EOs obtained were γ-terpinene (94.48%), 1,8-cineole (46.98%) and carvacrol (46.10%), respectively, for E. globulus, M. communis and S. hortensis. The in vitro antimicrobial activity of the EOs was evaluated against Staphylococcus aureus CECT 4459 and Escherichia coli O157:H7 CECT 4267 using the agar diffusion technique. Results revealed that E. globulus and S. hortensis EOs had more antibacterial effects than that from M. communis. Minimal inhibitory concentrations (MIC) showed a range of 0.05–0.22% (volume by volume [v/v]). Sensitivity of gram-positive S. aureus was much higher than that of gram-negative E. coli. Plant EOs were added to minced beef (two-fold MIC value) at 0.10–0.44%, experimentally inoculated with the same pathogens at a level of 5 × 105 colon...
VI International Symposium on Chemical and non-Chemical Soil and Substrate Disinfestation - SD2004, 2005
An experiment was carried out where gin trash that was weakly alkaline material and a commercial ... more An experiment was carried out where gin trash that was weakly alkaline material and a commercial organic fertiliser were added to an acid soil. Also, the residues of cotton-seed acid delinting product, was added to a calcareous soil. After nine weeks of incubation the effect of the above mentioned added materials on soil nitrification were evaluated. Another experiment was carried out to investigate the possibility of gin trash, cotton-seed acid delinting product and dried manure in dissemination of serious cotton pathogens (Fusarium oxysporum, Vertcillium dahliae, Rhizoctonia solani, Pythium ultimum and Thielaviopsis basicola) and their effect on the growth of the above mentioned five pathogens. The cotton seed gin trash acted effectively to nitrification process only at the rate 3% in organic matter, whereas cotton-seed acid delinting product demonstrated a negative effect on nitrification at the rates 2% and 3% in organic matter. All tested materials (cotton-seed acid delinting product, gin trash, organic fertilizer and manure) when added to selective culture media, did not find to carry any inoculum of the above mentioned cotton pathogens but favoured saprophytic organisms growth. On the other hand, only the cotton-seed acid delinting product obscured the growth of all tested cotton pathogens, whereas gin trash promoted growth of P. ultimum and R. solani, when these two materials were used as soil amendments.
The reduction of available water for irrigation in the Mediterranean region and especially in The... more The reduction of available water for irrigation in the Mediterranean region and especially in Thessaly which suffers particularly from reduced rainfall in recent years imposes the proper use of irrigation; certainly it is the key for the sustainable management of water. In a field experiment, established on the farm of the Technological Educational Institute of Larissa in 2012, the effects of irrigation and fertilization on the production and the basic characteristics of industrial tomatoes were evaluated. Four irrigation and four fertilization levels were applied. In the present work the relationships between irrigation, fertilization, production and essential qualities of the outdoor industrial tomato in central Greece were studied. The experimental data show a positive correlation of irrigation water to some of the quantity and quality characteristics examined. The results are in favour for an optimum use of irrigation and fertilization. Moreover, according to obtained data, the ...
Journal of the Science of Food and Agriculture, 2007
... Sabani P and Wogiatzi E, The effect of oregano (Origanum vulgare) as an alternative soil ... ... more ... Sabani P and Wogiatzi E, The effect of oregano (Origanum vulgare) as an alternative soil ... Wu J and Brookes PC, The proportional mineralisation of microbial biomass and organic matter caused ... cover crops in efficient use of water and nitrogen, in Croppin Strategies for Efficient ...
Biotechnology & Biotechnological Equipment, 2011
The essential oils yield and the chemical compositions of essential oils of broad and narrow basi... more The essential oils yield and the chemical compositions of essential oils of broad and narrow basil varieties were assessed for two years. The essential oil was obtained via hydrodistillation and analyzed using gas chromatography. The essential oil extraction yield varied among basil cultivars. The oil extraction yield for broad leaf basil cultivars, Large Leaf Basil and Genovese, was 1.3% and 2.1% respectively, while narrow leaf basil cultivars, Finissimo Verde a Palla and Larosa Emanuele-Sementi, had oil extraction yields of 1.5% and 1.8%, respectively. Regarding the active substances of basil oil, linalool and eugenol were dependent on the cultivar and year of cultivation. In the broad leaf basil cultivars the concentration of linalool remained constant during the two cultivation years, while eugenol content varied from the first to the second year of cultivation. In narrow leaf basil the content of linalool content fluctuated with cultivation year, while eugenol was the same in both experimental years. The broad leaf basil cultivar had on average for both cultivation years 3.8 mg g-1 linallol and 0.5 mg g-1 eugenol and the narrow leaf basil had 2.8 mg g-1 linallol and 0.7 mg g-1 eugenol.
Journal of Agricultural Engineering Research, 1999
Journal of the Science of Food and Agriculture, 2010
BACKGROUND: Oregano essential oil and neem have been reported to be effective against soil-borne ... more BACKGROUND: Oregano essential oil and neem have been reported to be effective against soil-borne pathogens and nematodes. The possibility of having an effect on soil properties was the aim of this investigation. Moreover, thiram, a common widely used chemical pesticide, was used for comparison. RESULTS: The effects of all three above-mentioned substances were investigated during an incubation experiment, for 15 weeks. Crushed neem pellets were added at 1.0, 2.0 or 3.0 g per 50 g of soil. Oregano dry matter was applied at 0.2, 0.4 or 0.6 g per 50 g of soil. Finally, thiram was applied at 0.1, 0.2 and 0.3 g per 50 g of soil. The addition of neem resulted in a decrease in organic carbon mineralisation, higher than that of oregano, but not as prominently as thiram. The addition of neem resulted in an increase in the content of nitrate, organic P, bioavailable P, bioavailable K and bioavailable Mn. Oregano had a slight negative effect on organic matter biodegradation, but caused an increase of nutritional mineral elements. Microbe colonies in soil were increased by the addition of neem cake granules, whereas oregano and thiram treatments caused a decrease. The addition of thiram reduced nitrate and available Mn contents, but at the lowest dose increased organic P and available K. Thiram reduced prominently available Cu at the upper rates, but it increased these forms at the lowest rate, while available Zn content was increased in two lowest rates. CONCLUSION: The results of this study indicated that neem or oregano could be applied to the soil without any extremely negative effect on the available forms of nutritional mineral elements, as thiram does.
Le Centre pour la Communication Scientifique Directe - HAL - Inria, 2012
An assessment of a fertilization management practice for exploitation of soil salts was made in a... more An assessment of a fertilization management practice for exploitation of soil salts was made in a four successive greenhouse cucumber crops. Only an organic commercial fertilizer in the form of black peat moss slightly enriched with inorganic elements was embedded basically, while during crop, a fertigation program was planned based on soil salinity level. This work confirmed that the plant need for nutrients might be covered largely by soil salts. The basic application of the organic fertilizer in relation to fertigation program applied during of crops period led to a reduced soil electrical conductivity from 0.66 to 0.24, 0.58 to 0.24, 0.80 to 0.49 and 0.55 to 0.39 dS/m respectively (soil extract of 1soil: 5 H 2 O). Significant increase in soil salinity was observed after soil solarization, in the first and second crops (EC 1,23 dS/m and EC 0.48 dS/m), however, not observed increase in soil salinity(EC 0.44 dS/m and EC 0.41 dS/m) after soil solarization for the third and the fourth crop. Then, excessive salinity levels in soil should be taken into account when fertilization management of cultural practices in successive crops is applied.
Food Science and Technology International, 2011
Essential oils (EOs) extracted by hydrodistillation from leaf parts of Algerian Eucalyptus globul... more Essential oils (EOs) extracted by hydrodistillation from leaf parts of Algerian Eucalyptus globulus, Myrtus communis and Satureja hortensis were analyzed by gas chromatography/mass spectrometry (GC/MS). The main components of EOs obtained were γ-terpinene (94.48%), 1,8-cineole (46.98%) and carvacrol (46.10%), respectively, for E. globulus, M. communis and S. hortensis. The in vitro antimicrobial activity of the EOs was evaluated against Staphylococcus aureus CECT 4459 and Escherichia coli O157:H7 CECT 4267 using the agar diffusion technique. Results revealed that E. globulus and S. hortensis EOs had more antibacterial effects than that from M. communis. Minimal inhibitory concentrations (MIC) showed a range of 0.05–0.22% (volume by volume [v/v]). Sensitivity of gram-positive S. aureus was much higher than that of gram-negative E. coli. Plant EOs were added to minced beef (two-fold MIC value) at 0.10–0.44%, experimentally inoculated with the same pathogens at a level of 5 × 105 colon...
VI International Symposium on Chemical and non-Chemical Soil and Substrate Disinfestation - SD2004, 2005
An experiment was carried out where gin trash that was weakly alkaline material and a commercial ... more An experiment was carried out where gin trash that was weakly alkaline material and a commercial organic fertiliser were added to an acid soil. Also, the residues of cotton-seed acid delinting product, was added to a calcareous soil. After nine weeks of incubation the effect of the above mentioned added materials on soil nitrification were evaluated. Another experiment was carried out to investigate the possibility of gin trash, cotton-seed acid delinting product and dried manure in dissemination of serious cotton pathogens (Fusarium oxysporum, Vertcillium dahliae, Rhizoctonia solani, Pythium ultimum and Thielaviopsis basicola) and their effect on the growth of the above mentioned five pathogens. The cotton seed gin trash acted effectively to nitrification process only at the rate 3% in organic matter, whereas cotton-seed acid delinting product demonstrated a negative effect on nitrification at the rates 2% and 3% in organic matter. All tested materials (cotton-seed acid delinting product, gin trash, organic fertilizer and manure) when added to selective culture media, did not find to carry any inoculum of the above mentioned cotton pathogens but favoured saprophytic organisms growth. On the other hand, only the cotton-seed acid delinting product obscured the growth of all tested cotton pathogens, whereas gin trash promoted growth of P. ultimum and R. solani, when these two materials were used as soil amendments.
The reduction of available water for irrigation in the Mediterranean region and especially in The... more The reduction of available water for irrigation in the Mediterranean region and especially in Thessaly which suffers particularly from reduced rainfall in recent years imposes the proper use of irrigation; certainly it is the key for the sustainable management of water. In a field experiment, established on the farm of the Technological Educational Institute of Larissa in 2012, the effects of irrigation and fertilization on the production and the basic characteristics of industrial tomatoes were evaluated. Four irrigation and four fertilization levels were applied. In the present work the relationships between irrigation, fertilization, production and essential qualities of the outdoor industrial tomato in central Greece were studied. The experimental data show a positive correlation of irrigation water to some of the quantity and quality characteristics examined. The results are in favour for an optimum use of irrigation and fertilization. Moreover, according to obtained data, the ...
Journal of the Science of Food and Agriculture, 2007
... Sabani P and Wogiatzi E, The effect of oregano (Origanum vulgare) as an alternative soil ... ... more ... Sabani P and Wogiatzi E, The effect of oregano (Origanum vulgare) as an alternative soil ... Wu J and Brookes PC, The proportional mineralisation of microbial biomass and organic matter caused ... cover crops in efficient use of water and nitrogen, in Croppin Strategies for Efficient ...
Biotechnology & Biotechnological Equipment, 2011
The essential oils yield and the chemical compositions of essential oils of broad and narrow basi... more The essential oils yield and the chemical compositions of essential oils of broad and narrow basil varieties were assessed for two years. The essential oil was obtained via hydrodistillation and analyzed using gas chromatography. The essential oil extraction yield varied among basil cultivars. The oil extraction yield for broad leaf basil cultivars, Large Leaf Basil and Genovese, was 1.3% and 2.1% respectively, while narrow leaf basil cultivars, Finissimo Verde a Palla and Larosa Emanuele-Sementi, had oil extraction yields of 1.5% and 1.8%, respectively. Regarding the active substances of basil oil, linalool and eugenol were dependent on the cultivar and year of cultivation. In the broad leaf basil cultivars the concentration of linalool remained constant during the two cultivation years, while eugenol content varied from the first to the second year of cultivation. In narrow leaf basil the content of linalool content fluctuated with cultivation year, while eugenol was the same in both experimental years. The broad leaf basil cultivar had on average for both cultivation years 3.8 mg g-1 linallol and 0.5 mg g-1 eugenol and the narrow leaf basil had 2.8 mg g-1 linallol and 0.7 mg g-1 eugenol.
Journal of Agricultural Engineering Research, 1999
Journal of the Science of Food and Agriculture, 2010
BACKGROUND: Oregano essential oil and neem have been reported to be effective against soil-borne ... more BACKGROUND: Oregano essential oil and neem have been reported to be effective against soil-borne pathogens and nematodes. The possibility of having an effect on soil properties was the aim of this investigation. Moreover, thiram, a common widely used chemical pesticide, was used for comparison. RESULTS: The effects of all three above-mentioned substances were investigated during an incubation experiment, for 15 weeks. Crushed neem pellets were added at 1.0, 2.0 or 3.0 g per 50 g of soil. Oregano dry matter was applied at 0.2, 0.4 or 0.6 g per 50 g of soil. Finally, thiram was applied at 0.1, 0.2 and 0.3 g per 50 g of soil. The addition of neem resulted in a decrease in organic carbon mineralisation, higher than that of oregano, but not as prominently as thiram. The addition of neem resulted in an increase in the content of nitrate, organic P, bioavailable P, bioavailable K and bioavailable Mn. Oregano had a slight negative effect on organic matter biodegradation, but caused an increase of nutritional mineral elements. Microbe colonies in soil were increased by the addition of neem cake granules, whereas oregano and thiram treatments caused a decrease. The addition of thiram reduced nitrate and available Mn contents, but at the lowest dose increased organic P and available K. Thiram reduced prominently available Cu at the upper rates, but it increased these forms at the lowest rate, while available Zn content was increased in two lowest rates. CONCLUSION: The results of this study indicated that neem or oregano could be applied to the soil without any extremely negative effect on the available forms of nutritional mineral elements, as thiram does.