Resposta da cultura da soja a doses de enxofre

Abstract

Sulfur (S) is part of several biochemical processes in plants, such as protein synthesis, chlorophyll formation and root nodulation in soybeans (Glycine max L.), Is absorbed by plants in the form of sulfate (SO4-²). However, the nutrient is neglected in fertilization programs and the levels of the element in the soil they are in decline, due to protocols to reduce gas emissions, application of fertilizers with low nutrient content and constant exportation by crops. The objective of the research was to evaluate the response of soybean to doses of S via organomineral source. The experimental design was a randomized block with six doses of sulfur (S), (0, 30, 60, 90, 120 and 150 mg dm³ of S) and 4 repetitions(n=4). The cultivar used as a response to the treatments was SYN1561 Intacta IPRO RR2, using two plants in 10 dm³ pots filled with soil. At harvest, plant height (AP), insertion height of the first pod (APV), were measured, and the number of pods per plant (NVP), number of grains per pod (NGV), weight of 100 grains(PCG) were counted and pot production(RGV) and doses compared using regression analysis. The sulfur doses used showed a significant effect on almost all variables, except for the number of grains per pod(NGV), S being an important element in the management of soy fertilization in areas with low organic matter and S.