Doses de gesso agrícola no crescimento e produtividade da soja no município de Vera – MT

Abstract

Agricultural gypsum performs the function of neutralizing toxic aluminum and supplementing essential cations, such as calcium, magnesium and sulfur. The application of gypsum conditions the soil, carrying nutrients to the subsurface, justifying the increasing increase in its application. The objective of the work was to determine the most effective dose of gypsum applied to a soil with a clayey texture in the municipality of Vera/MT. The experiment was installed on September 19, 2023. The plots were composed of five planting lines 5 meters long. The spacing was 0.5 between lines. The experimental design was randomized blocks with five replications and five doses: 0; 500; 1000; 2000 and 4000 kg ha-1 totaling twenty-five plots. Vegetative growth variables such as stem diameter, plant height and leaf area were evaluated. The green color of chlorophyll was evaluated using a chlorophyllometer. At the end of the experiment, the productivity components were evaluated: number of pods, grains per pod, as well as the weight of a thousand seeds – related to the harvested mass, or harvest determined in kg ha-1. It is concluded that the application of gypsum promotes an increase in the diameter of the plants, but in general it does not alter vegetative growth; The application of gypsum does not change the productivity of soybean cv CZ37B51, however, when applying a dose of 1000 kg ha -1, a non-significant increase of 468.8 kg ha -1 in soybean productivity was observed.