Produtividade e qualidade de sementes em função de diferentes densidades de plantas de soja

Abstract

Soya production is becoming more and more technified, either by investments in fertilizers, modern machinery and the very seed that carries with it the technological package developed by the growers and the producer hopes to have good productivity results in the field from these investments. The objective of this work was to evaluate if the variation of populations of soybean plants influences generating productivity increases. A comparison of the harvests of the 2013/2014, 2014/2015 and 2015/2016 harvests was carried out and the cultivar used was the M6972IPRO. The planting occurred from the beginning to the middle of November of the year 2013, 2014 and 2015. The harvest occurred in the month of March, approximately 105 days after the emergency. In order to conduct this research, three populations were evaluated: A = 22 plants / m, B = 18 plants / m and C = 16 plants / m with spacing of 50 cm, totaling 15 lines per population, with only 12 central lines being harvested. After the harvest the soybean was obtained the weight and the degree of humidity. They were conducted by the Laboratory of Internal Quality Control of the company, Germination Test and Accelerated Aging Test to observe if the physiological characteristics suffered any change with the population variation. From the results obtained, it was possible to conclude that the population C = 16 plants / m, was the one that obtained the best productivity results 3800 kg, when compared to the other populations and harvests. Regarding the physiological quality of the seed during the three harvests compared, there was no significant difference with the population variation.