Avaliação da produtividade da soja V-MAX RR em função da aplicação foliar de bioestimulantes

Abstract

Biostimulators are vegetal-regulator-based commercial products, exogenously applied in the soybean culture via seed treatment or foliar application, aiming to promote division in the plant, elongation and cellular differentiation, stimulating plant growth and development. For that reason, this study aimed to evaluate the response of V-Max RR soybean’s yeld components to foliar application of two biostimulator-commercial products. The experiment was carried out in Sertaneja- PR. The cultivar was sown in two populations of plants, 160 and 300 thousand plants ha-1 and submitted to seven treatments for each population: 1- Control, 2- Stimulate with application in V3, 3- Stimulate with application in V3 and 15 days after first application, 4- Stimulate with application in V3, 15 and 30 days after first application, 5- Booster with application in V3, 6- Booster with application in V3 and 15 days after first application and 7- Booster with application in V3, 15 and 30 days after first application. Experimental design used was completely randomized, in a 7x2 factorial arrangement (7 treatments and 2 plant populations) with four replications. The results were submitted to polynomial regression analysis and each average was compared through Duncan test at a 5% error probability level. The analysed variables were: number of pods and seeds per plant; number of seeds per pod; 1000 seeds weight and productivity. There wasn’t effect of biostimulators application on the increase in soybean yeld even with an increase of some yeld components as pods per plant and 1000 seeds weight in lower plant population when Stimulate product was used.