Produção de massa seca de Forrageiras tropicais em consórcio com a cultura da Soja no Cerrado Tocantinense.

Abstract

The use of forages as soil cover has the role of conditioning the soil and improving its physical and chemical characteristics, for a better development of the succession crop. The objective of this work was to evaluate forage growth and dry matter production for straw formation, as well as its influence on soybean crop grain yield. The experiment was conducted in the 2018/19 agricultural harvest at the Experimental Farm of the Federal University of Tocantins, Campus Gurupi, located in the municipality of Gurupi-TO. The dry matter production of six forage cultivars and their effects on PG (soybean grain yield) was compared. Forage evaluations occurred with successive cuts after regrowth, and soybean grain yield was measured after crop maturation. The highest MSFA was 13989 kg ha-1 with cv. Mombasa. In PG the highest means were obtained for soybean intercropped with Mombaça and Piatã, producing 4071 kg ha-1 and 3997 kg ha-1, respectively. The low value of the correlation coefficient (r=0.306) indicates that there was no significant result in productivity among forages. The forages Mombaça, Kenya and Tamani presented the highest accumulated growth rate and the highest total dry mass. Only soybean intercropped with Zuri grass had lower averages in terms of grain yield. Keywords: Cultivation Systems, Forage, Soybeans, Soil, Productivity.