ASIAN SOYBEAN RUST: MODELING THE IMPACT ON SOYBEAN GRAIN YIELD IN THE TRIANGULO MINEIRO/ALTO PARANAIBA REGION, MINAS GERAIS, BRAZIL

作者：Rodrigues Rafael de Avila^*; Juliatti Fernando Cezar; Pedrini Joao Eduardo; Cunha Fernandes Jose Mauricio; Justino Flavio Barbosa; Heinemann Alexandre Bryan; Fraisse Clyde William; Boucas Farias Jose Renato; Pavan Willingthon; Costa Luiz Claudio; Ribeiro do Vale Francisco Xavier; Rezende Anakely Alves

来源：Bioscience Journal, 2013, 29(2): 264-279.

• Glycine max
• modeling
• Phakopsora pachyrhizi

Understanding the impact of Asian soybean rust on soybean yield is of great importance in the crop simulation model for this crop become it is possible to predict yield using different sowing dates and growth conditions. The goal of this study were to evaluate the performance of two soybean cultivars in Triangulo Mineiro/Alto Paranaiba, MG, Brazil and the effects of soybean rust on the yield of these cultivars using the CSM-CROPGRO Soybean model. Two soybean cultivars "NK 7074" (early) and "UFUS-Impacta" (medium late), which differ in their development cycles, were growing in Uberaba city during the 2009/2010 growing season. The validation for cultivar "UFUS-Impacta" was conducted comparing the measured and simulated yield data considering three different sowing dates in the "Uberlandia" city during the 2002/2003 growing season. Daily meteorological data obtained from six meteorological stations of the National Institute of Meteorology (INMET). To determine the performance of the soybean cultivars and the effect of soybean rust on yield, three different scenarios were used: no occurrence of rust (NOR) and occurrence of rust with inoculum concentrations of U5.000 and U10.000 urediniospores/mL. For all environments studied, the early cultivar had the best performance than the medium late cultivar. Soybean rust had the most effect on yield for the U10.000 scenario than for the U5.000 scenario. The best soybean performance occurred for "Araxa" and "Uberaba" cities. The South-Southeast area of the "Triangulo Mineiro/Alto Paranaiba" region was the most sensitive to the effect of rust on yield compared to the North region.

• 出版日期2013-4