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Sensitivity of the sorghum yield to individual changes in climate parameters: modelling based approach Bragantia
Grossi,Marine Cirino; Justino,Flávio; Rodrigues,Rafael de Ávila; Andrade,Camilo Lelis Teixeira.
Based on sensitivity analyses the effect of changing in climate on sorghum has been investigated. This has been achieved by conducting crop modeling experiments carried out with weather observations and output of global climate models. As can be anticipated results demonstrated that the sorghum yield is more sensitive to rainfall, solar radiation and CO2 concentration. However, the increase in CO2 concentration has a positive effect on yield in years that the crop is submitted to water stress. This effect is extremely reduced under well watered conditions and therefore is subject to the climate inter-annual variability. Accumulated solar radiation along the sorghum cycle below 1900 MJ m–2 has also been shown to reduce the yield. Compared to other weather...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Climate change; Crop models; Sensitivity analyses; CO2 concentration; Productivity.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000300341
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Utilization of the cropgro-soybean model to estimate yield loss caused by Asian rust in cultivars with different cycle Bragantia
Rodrigues,Rafael de Ávila; Pedrini,João Eduardo; Fraisse,Clyde William; Fernandes,José Maurício Cunha; Justino,Flávio Barbosa; Heinemann,Alexandre Bryan; Costa,Luiz Cláudio; Vale,Francisco Xavier Ribeiro do.
In recent years, crop models have increasingly been used to simulate agricultural features. The DSSAT (Decision Support System for Agrotechnology Transfer) is an important tool in modeling growth; however, one of its limitations is related to the unaccounted-for effect of diseases. Therefore, the goals of this study were to calibrate and validate the CSM CROPGRO-Soybean for the soybean cultivars M-SOY 6101 and MG/BR 46 (Conquista), analyze the performance and the effect of Asian soybean rust on these cultivars under the environmental conditions of Viçosa, Minas Gerais, Brazil. The experimental data for the evaluation, testing, and adjustment of the genetic coefficients for the cultivars, M-SOY 6101 and MG/BR 46 (Conquista), were obtained during the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: DSSAT; Calibration; Validation; Modeling; Rust epidemics.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000200021
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