Abstract
In Brasil, Minas Gerais is the sixth state in soybean production. Adverse climatic conditions such as short mini-droughts ("veranicos"), irregular rainfall distribution and especially high temperatures can compromise the proper development of the crop in that state, especially in relation to the production of high quality seeds. The aim of this study was to collect and analyze data in order to establish an agro-climatic zoning of the state of Minas Gerais for the production of high quality soybean seeds. These values were georeferenced in terms of the latitude and longitude coordinates and, with the use of a geographic information system, a thematic map was created, in which the best growing regions in Minas Gerais are represented. The definition of higher or lower climate risk areas was associated with the occurrence of average temperatures during the seed maturation phase, the most sensitive stage of growth. On the basis of the data obtained on temperature and altitude of different locations, and considering the normal growth period, it was possible to outline a map with three distinct areas: Favorable - average temperature < 23,5 ºC; moderately favorable - average temperature between 23,6 ºC and 24,9 ºC; Unfavorable - average temperature > 25,0 ºC.
Highlights
Brazil’s soybean yield in 2013/14 set a new record as the production reached more than 86 million tons, the result of approximately 30 million hectares devoted to cropland
A successful soybean crop depends on several factors, but undoubtedly the most important of them is the use of high quality seeds, producing strong, vigorous plants, with superior performance in the field (França-Neto et al, 2014), tolerating potential stresses arising from different environmental conditions
Due to a lack of information and considering the importance of making available a detailed zoning in state of Minas Gerais, the aim of this study was to undertake a survey data collection to establish an agroclimatic zoning for the production of high quality soybean seeds
Summary
Brazil’s soybean yield in 2013/14 set a new record as the production reached more than 86 million tons, the result of approximately 30 million hectares devoted to cropland. In this harvest, Minas Gerais was the sixth state in soybean production in Brazil, harvesting about 3.3 million tonnes, a fruit of 1,238 million hectares cultivated (CONAB, 2014). Minas Gerais was the sixth state in soybean production in Brazil, harvesting about 3.3 million tonnes, a fruit of 1,238 million hectares cultivated (CONAB, 2014) Adverse climatic conditions such as availability of water content, short mini-droughts (“veranicos”), irregular rainfall distribution throughout the year and high temperatures can compromise the proper development of the crop in that state, especially in relation to the production of high quality seeds. The soybean crop establishment with high quality seeds is of key importance
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