Calagem incorporada ao final do período chuvoso, em área de abertura, em Mato Grosso

Abstract

Liming is an agricultural practice used to correct soil acidity and profile preparation, bringing productivity gains to crops. The objective of this work was to evaluate the effect of the application of dolomitic limestone on the soil attributes and on the productivity of soybean and corn crops in openings of new areas. The experiment was carried out on a farm located in the municipality of Marcelândia-MT, with treatments arranged in randomized blocks, using five doses of dolomitic limestone (0.0; 3.0; 6.0; 9.0; 12 t ha -1), in 4 repetitions. The doses were incorporated into the surface layer of the soil (0-20 cm) applied at the end of the 2019 rainy season (04/10/2019). The experiment was conducted from April 2019 to June 2021. The chemical attributes of the soil were evaluated in addition to the development and productivity of corn and soybean crops in 2 harvests (2019/2020 and 2020/2021). The results demonstrated the efficiency of using dolomitic limestone in increasing pH and reducing potential acidity. Liming promoted increases in Ca and Mg contents and base saturation. The application of limestone was essential for increasing soil fertility, contributing significantly to increasing the productivity of soybean and corn crops. The results obtained in this experiment showed that the best soybean yields were obtained with a dose of 12 t ha-1. For corn, the best dose observed was 6 t ha-1.