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Papers by Gustavo Pereira Valani
Orientadora: Fabiane Machado VezzaniCoorientadora: Karina Maria Vieira Cavalieri PolizeliDisserta... more Orientadora: Fabiane Machado VezzaniCoorientadora: Karina Maria Vieira Cavalieri PolizeliDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Agrárias, Programa de Pós-Graduação em Ciência do Solo. Defesa : Curitiba, 29/01/2019Inclui referências: p. 32-36Resumo: Apesar da avaliação da qualidade do solo ser baseada principalmente em métodos laboratoriais, a avaliação da qualidade do solo em campo permite que agricultores, técnicos e pesquisadores analisem solos de forma rápida e econômica. A hipótese desse estudo foi que dois métodos de avaliação da qualidade do solo em campo, o Diagnostico Rápido da Estrutura do Solo (DRES) e o Guia Pratico de Avaliação Participativa da Qualidade do Solo (PGPE) são eficientes em diferir a qualidade de solos em diferentes sistemas de manejo em relação a metodologia laboratorial amplamente utilizada SMAF (Soil Management Assessment Framework). Portanto, esse estudo objetivou testar o DRES, PGPE e o SMAF em solos com diferentes si...
Ciência Rural, 2022
ABSTRACT: Nutrients accumulation in plants/fruits varies according to the crop development stage ... more ABSTRACT: Nutrients accumulation in plants/fruits varies according to the crop development stage and its quantification is important to determine nutrients exportation for fertilization planning and nutrient balancing. This study determined the accumulation of nutrients in different parts of Piper nigrum ‘Bragantina’ spikes harvested at two ripening stages (still-green and red-colored spikes). Assessments in separate parts of still-green spikes (fruits and peduncles) as well as in red-colored spikes (grains, flesh and peduncles) were performed. Piper nigrum spikes were harvested, dried, and the parts were thereafter separated for chemical analysis. N and Mn were the macro and micronutrient most accumulated in the fruits of still-green spikes and in the grains of red-colored spikes, while K and B were most accumulated in the other parts of black pepper assessed, regardless of the ripening stage. The process of removing the flesh from the fruits for white pepper production led to a di...
Soil and Tillage Research, 2022
Soil Use and Management, 2020
Sustainability, 2021
Seeking to provide essential information about sustainable tillage systems, this work aimed to as... more Seeking to provide essential information about sustainable tillage systems, this work aimed to assess the effects of liming and soil cultivation systems on the soil hydrophysical attributes of a long-term cultivated sugarcane field in the tropical region of southeast Brazil. Infiltration tests and soil sampling down to 0.10 m were performed in order to determine saturated soil hydraulic conductivity, soil bulk density, soil total porosity, macroporosity, microporosity, and soil resistance to penetration. The studied areas include no-tillage (NT) and conventional tillage (CT) systems with 0 (CT0 and NT0) and 4 (CT4 and NT4) Mg ha−1 of lime, and an adjoining area with native forest (NF). The data analysis included an analysis of variance followed by the Tukey test to compare different systems, assessment of the Pearson correlation coefficient between variables, and a principal component analysis of the dataset. The lowest bulk density and highest soil total porosity, macroporosity and...
Agronomy, 2020
Coffee breeding based on root traits is important to identify productive genotypes under adverse ... more Coffee breeding based on root traits is important to identify productive genotypes under adverse environmental conditions. This study assessed the diversity of root traits in Coffea canephora and its correlation with plant height and crop yield. Undisturbed soil samples were collected down to 60 cm from 43 coffee genotypes, in which one of them was propagated by seed and all others by stem cutting. The roots were washed, scanned, and processed to quantify root length density, root volume, root superficial area, and root diameter. Additionally, plant height and crop yield were also assessed. Root length density ranged from 40 to 1411 mm cm−3, root volume from 6 to 443 mm3 cm−3, root superficial area from 61 to 1880 mm2 cm−3, and root diameter from 0.6 to 1.1 mm. Roots were concentrated in the topsoil (0–20 cm) for most genotypes. In deeper depths (30–60 cm), root length density, root volume, and root superficial area were higher in genotypes 14, 25, 31, and 32. Positive correlations ...
Pesquisa Agropecuária Brasileira, 2020
Soil and Tillage Research, 2020
Abstract Environmental sustainability is attracting attention due to global environmental concern... more Abstract Environmental sustainability is attracting attention due to global environmental concerns and one of the main focuses is agricultural production. Sugarcane (Saccharum officinarum) is a crop of global significance and one of the important issues to be addressed towards its sustainable production is how soil quality has been considered in sugarcane cultivation. This bibliometric study aimed to investigate how soil quality has been addressed in sugarcane management research, as well as to identify possible knowledge gaps to be considered in future studies. The bibliographic search was performed by using a combination of terms considering all databases from the Web of Science ® (WOS). A total of 160 scientific publications were found and the following information was analyzed: i) publication years, ii) countries, iii) institutions, iv) authors, and v) research areas. Furthermore, to identify possible gaps in the literature, we classified soil-related papers in the following categories: soil physics, soil chemistry, soil use and management, soil conservation, soil survey and classification, soil micromorphology, soil biology, soil geochemistry, and soil fertility and plant nutrition. We also presented the most cited papers and contribution maps for countries considering a subset of 119 articles from the WOS Core Collection database. Concerns about soil quality in the cultivation of sugarcane have increased in recent years, especially in the last 9 years, when 74 % of the total papers were published. Brazil is the country responsible for 99 out of 160 publications with 12 institutions and 13 authors responsible for the largest number of publications. From a total of 160 published articles, 97 % were related to agriculture research and 71 % to soil science, whereas soil use and management was the most reported category. We found a lack of studies of no-tillage systems in sugarcane cultivation that assess soil quality, and that integrate physical, chemical and biological indicators, including hydrophysical, micromorphological and macrofauna analyses as indicators of soil quality. Therefore, we suggest that these issues should be considered in future studies.
Soil and Tillage Research, 2020
Abstract Although soil quality assessments are mostly based on analytical approaches, on-farm eva... more Abstract Although soil quality assessments are mostly based on analytical approaches, on-farm evaluations help farmers, advisors and researchers to analyse soils rapidly and inexpensively. This study’s hypothesis was that two on-farm soil quality assessments, the Rapid Diagnosis of Soil Structure (DRES) and the Practical Guide for Participative Evaluation of Soil Quality (PGPE) are able to distinguish the quality of soils under different management systems as effectively as the widely-used and analytical strategy SMAF (Soil Management Assessment Framework). Thus, this study aimed to test DRES, PGPE and SMAF in soils under different management systems, as well as to determine the correlation between the results from each on-farm assessment (DRES and PGPE) and SMAF results. Cambisols of conventional farming, no-tillage farming, organic farming, agroforestry systems and native vegetations were sampled in the 0−25 cm layer in two different municipalities with subtropical climate in southern Brazil. SMAF assessment was performed by integrating six soil quality indicators (total organic carbon, microbial biomass carbon, macroaggregate stability, bulk density, soil pH and available soil P) into a final soil quality index. DRES assessment combined on-farm information about soil aggregates, compaction, rupture resistance, root system and biological activity into a final soil quality index. PGPE assessment integrated the on-farm observation of organic matter, root system, soil structure, soil compaction and infiltration, erosion, water retention, soil macrofauna and soil cover into a final soil quality index. The on-farm strategies to assess soil quality DRES and PGPE were proven to be able to distinguish different soil management systems, as well as was the analytical method SMAF. The PGPE distinguished a wider range of sites than DRES, regardless the municipality or soil texture. The PGPE was more correlated with the SMAF than the DRES, especially in clayey and clayey loam soils. These results highlight the value of on-farm soil quality assessments, providing timely results for ease of interpretation.
Archives of Agronomy and Soil Science, 2021
Different soil management strategies may either promote or degrade soil structure. This study aim... more Different soil management strategies may either promote or degrade soil structure. This study aimed to test the Visual Evaluation of Soil Structure (VESS) method in a smallholder agroforestry syste...
Orientadora: Fabiane Machado VezzaniCoorientadora: Karina Maria Vieira Cavalieri PolizeliDisserta... more Orientadora: Fabiane Machado VezzaniCoorientadora: Karina Maria Vieira Cavalieri PolizeliDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Agrárias, Programa de Pós-Graduação em Ciência do Solo. Defesa : Curitiba, 29/01/2019Inclui referências: p. 32-36Resumo: Apesar da avaliação da qualidade do solo ser baseada principalmente em métodos laboratoriais, a avaliação da qualidade do solo em campo permite que agricultores, técnicos e pesquisadores analisem solos de forma rápida e econômica. A hipótese desse estudo foi que dois métodos de avaliação da qualidade do solo em campo, o Diagnostico Rápido da Estrutura do Solo (DRES) e o Guia Pratico de Avaliação Participativa da Qualidade do Solo (PGPE) são eficientes em diferir a qualidade de solos em diferentes sistemas de manejo em relação a metodologia laboratorial amplamente utilizada SMAF (Soil Management Assessment Framework). Portanto, esse estudo objetivou testar o DRES, PGPE e o SMAF em solos com diferentes si...
Ciência Rural, 2022
ABSTRACT: Nutrients accumulation in plants/fruits varies according to the crop development stage ... more ABSTRACT: Nutrients accumulation in plants/fruits varies according to the crop development stage and its quantification is important to determine nutrients exportation for fertilization planning and nutrient balancing. This study determined the accumulation of nutrients in different parts of Piper nigrum ‘Bragantina’ spikes harvested at two ripening stages (still-green and red-colored spikes). Assessments in separate parts of still-green spikes (fruits and peduncles) as well as in red-colored spikes (grains, flesh and peduncles) were performed. Piper nigrum spikes were harvested, dried, and the parts were thereafter separated for chemical analysis. N and Mn were the macro and micronutrient most accumulated in the fruits of still-green spikes and in the grains of red-colored spikes, while K and B were most accumulated in the other parts of black pepper assessed, regardless of the ripening stage. The process of removing the flesh from the fruits for white pepper production led to a di...
Soil and Tillage Research, 2022
Soil Use and Management, 2020
Sustainability, 2021
Seeking to provide essential information about sustainable tillage systems, this work aimed to as... more Seeking to provide essential information about sustainable tillage systems, this work aimed to assess the effects of liming and soil cultivation systems on the soil hydrophysical attributes of a long-term cultivated sugarcane field in the tropical region of southeast Brazil. Infiltration tests and soil sampling down to 0.10 m were performed in order to determine saturated soil hydraulic conductivity, soil bulk density, soil total porosity, macroporosity, microporosity, and soil resistance to penetration. The studied areas include no-tillage (NT) and conventional tillage (CT) systems with 0 (CT0 and NT0) and 4 (CT4 and NT4) Mg ha−1 of lime, and an adjoining area with native forest (NF). The data analysis included an analysis of variance followed by the Tukey test to compare different systems, assessment of the Pearson correlation coefficient between variables, and a principal component analysis of the dataset. The lowest bulk density and highest soil total porosity, macroporosity and...
Agronomy, 2020
Coffee breeding based on root traits is important to identify productive genotypes under adverse ... more Coffee breeding based on root traits is important to identify productive genotypes under adverse environmental conditions. This study assessed the diversity of root traits in Coffea canephora and its correlation with plant height and crop yield. Undisturbed soil samples were collected down to 60 cm from 43 coffee genotypes, in which one of them was propagated by seed and all others by stem cutting. The roots were washed, scanned, and processed to quantify root length density, root volume, root superficial area, and root diameter. Additionally, plant height and crop yield were also assessed. Root length density ranged from 40 to 1411 mm cm−3, root volume from 6 to 443 mm3 cm−3, root superficial area from 61 to 1880 mm2 cm−3, and root diameter from 0.6 to 1.1 mm. Roots were concentrated in the topsoil (0–20 cm) for most genotypes. In deeper depths (30–60 cm), root length density, root volume, and root superficial area were higher in genotypes 14, 25, 31, and 32. Positive correlations ...
Pesquisa Agropecuária Brasileira, 2020
Soil and Tillage Research, 2020
Abstract Environmental sustainability is attracting attention due to global environmental concern... more Abstract Environmental sustainability is attracting attention due to global environmental concerns and one of the main focuses is agricultural production. Sugarcane (Saccharum officinarum) is a crop of global significance and one of the important issues to be addressed towards its sustainable production is how soil quality has been considered in sugarcane cultivation. This bibliometric study aimed to investigate how soil quality has been addressed in sugarcane management research, as well as to identify possible knowledge gaps to be considered in future studies. The bibliographic search was performed by using a combination of terms considering all databases from the Web of Science ® (WOS). A total of 160 scientific publications were found and the following information was analyzed: i) publication years, ii) countries, iii) institutions, iv) authors, and v) research areas. Furthermore, to identify possible gaps in the literature, we classified soil-related papers in the following categories: soil physics, soil chemistry, soil use and management, soil conservation, soil survey and classification, soil micromorphology, soil biology, soil geochemistry, and soil fertility and plant nutrition. We also presented the most cited papers and contribution maps for countries considering a subset of 119 articles from the WOS Core Collection database. Concerns about soil quality in the cultivation of sugarcane have increased in recent years, especially in the last 9 years, when 74 % of the total papers were published. Brazil is the country responsible for 99 out of 160 publications with 12 institutions and 13 authors responsible for the largest number of publications. From a total of 160 published articles, 97 % were related to agriculture research and 71 % to soil science, whereas soil use and management was the most reported category. We found a lack of studies of no-tillage systems in sugarcane cultivation that assess soil quality, and that integrate physical, chemical and biological indicators, including hydrophysical, micromorphological and macrofauna analyses as indicators of soil quality. Therefore, we suggest that these issues should be considered in future studies.
Soil and Tillage Research, 2020
Abstract Although soil quality assessments are mostly based on analytical approaches, on-farm eva... more Abstract Although soil quality assessments are mostly based on analytical approaches, on-farm evaluations help farmers, advisors and researchers to analyse soils rapidly and inexpensively. This study’s hypothesis was that two on-farm soil quality assessments, the Rapid Diagnosis of Soil Structure (DRES) and the Practical Guide for Participative Evaluation of Soil Quality (PGPE) are able to distinguish the quality of soils under different management systems as effectively as the widely-used and analytical strategy SMAF (Soil Management Assessment Framework). Thus, this study aimed to test DRES, PGPE and SMAF in soils under different management systems, as well as to determine the correlation between the results from each on-farm assessment (DRES and PGPE) and SMAF results. Cambisols of conventional farming, no-tillage farming, organic farming, agroforestry systems and native vegetations were sampled in the 0−25 cm layer in two different municipalities with subtropical climate in southern Brazil. SMAF assessment was performed by integrating six soil quality indicators (total organic carbon, microbial biomass carbon, macroaggregate stability, bulk density, soil pH and available soil P) into a final soil quality index. DRES assessment combined on-farm information about soil aggregates, compaction, rupture resistance, root system and biological activity into a final soil quality index. PGPE assessment integrated the on-farm observation of organic matter, root system, soil structure, soil compaction and infiltration, erosion, water retention, soil macrofauna and soil cover into a final soil quality index. The on-farm strategies to assess soil quality DRES and PGPE were proven to be able to distinguish different soil management systems, as well as was the analytical method SMAF. The PGPE distinguished a wider range of sites than DRES, regardless the municipality or soil texture. The PGPE was more correlated with the SMAF than the DRES, especially in clayey and clayey loam soils. These results highlight the value of on-farm soil quality assessments, providing timely results for ease of interpretation.
Archives of Agronomy and Soil Science, 2021
Different soil management strategies may either promote or degrade soil structure. This study aim... more Different soil management strategies may either promote or degrade soil structure. This study aimed to test the Visual Evaluation of Soil Structure (VESS) method in a smallholder agroforestry syste...