Crescimento e rendimento em resposta das cultivares de soja BMX Desafio RR, BMX Ultra IPRO e BMX Bônus IPRO à variação do espaçamento entrelinhas

Abstract

Here we present the result of a practical study of spacing’s obtained by growing soybeans in a given area of cultivation. It is known that productivity of a culture is defined by the interaction between plant, the production environment and handling. Among the management practices the sowing spacing is a determining factor for the arrangement of plants in the production environment and influence on soybean growth. The experiment was conducted in the city of Rondonópolis-MT, located in the southern region of the state. The plots consisted of spacing’s (0.35m;0.45m and 0.50m) lines corresponding to a population of 350,000 plants / ha, and the subplots of cultivars BMX Challenge RR, BMX and BMX Ultra IPRO IPRO Bonus. The agronomic characteristics evaluated were: number of pods per plant (NVP); Number of seeds per pod (NGV); plant height (AP); Number of nodes reproductive (NR); insertion height of the first pod (AIV); lodging index (AC); 1000 grain weight (PMS); productivity (kg / ha). the design was used in a randomized block design, with averages compared by 5% Tukey test. Analysis of variance indicated that with the exception of productivity was a significant effect in the interaction spacing versus nurture for AP, NR, AIR, NVP, NGP and P100G. In all spacing’s to cultivate BMX bonus was higher in AP, NR and P100G, cultivating BMX Challenge was higher in NVP and NGP compared to other cultivars. Among the spacing’s there was no significant difference in productivity, and to cultivate BMX Challenge with higher productivity. Therefore it is concluded that the cultivars responded differently to spacing’s. However, the three did not show significant variations in the final yield.