Produtividade de plantas de soja sob doses de brassinosteroides

Abstract

.The present study aimed to identify the effects of brassinosteroid on grain yield in soybean plants. The work was carried out in two consecutive years in commercial soybean planting Monsoy 8372 IPRO 125 days of indeterminate growth, in the municipality of Ipameri, Goiás. The experiment followed a randomized block design in a split plot with regulator concentrations in the plots (0; 0.05; 0.1; 0.2 and 0.4 mg L-1 ) and the phenological stages of application in the subplots (V4, R5, V4 and R5) in a spray volume of 100 L ha-1 . Maximum uniformity was sought during application by spraying the leaf area of soybean plants using a high-precision manual sprayer with flow control. Brassinosteroids increase pod drain strength in soybean plants and have positive effects on yield variables. Thus, the plant regulator is an important alternative for implementing a new management practice for the species with the routine use of Br in the vegetative (V4) and reproductive (R5) stages at a concentration of 0.2 mg L-1 .