Desempenho agronômico de cultivares de soja no Norte de Mato Grosso

Abstract

The objective of this work is to evaluate the influence of meteorological variables on the increase in biomass and productivity of soybean cultivars with different planting densities in the Cerrado-Amazon transition region. The study was carried out in partnership with BS agricultural consultancy in an experimental area of the company AGROPEL Sementes, located in the city of Sinop in the Middle-North region of the state of Mato Grosso, with meteorological data from the National Institute of Meteorology (INMET) between October 2017 to February 2018. The treatments were soybean cultivars with density less than 12 plants per linear meter, cultivars from 12.1 to 15 plants per linear meter, cultivars from 15.1 to 18 plants per linear meter and cultivars greater than 18 .1 plants per linear meter in the 2017/18 harvest. A randomized block experimental design was used with 160 x 110 m plots in each block and four replications composed of 1 linear meter of evaluated plants, where the plants were removed fortnightly and, through destructive analysis, the parameters of height, diameter, leaf area, dry mass were measured. The total accumulated thermal sum of the culture was approximately 1200 GDA during the 110 days of cultivation. The maximum leaf area index reached was 6.35 for the cultivar PRE 8230 RR and the most productive cultivars were TMG 1180 IPRO, AS 3810 IPRO and BRS 7380 RR (4,804.52, 4,630.2 and 4,904.6 kg. ha- 1), respectively.