INTERFERÊNCIA DO ARRANJO ESPACIAL DE PLANTAS NO RENDIMENTO DE SILAGEM DO CONSÓRCIO DE MILHO E SOJA

Abstract

The consortium between grasses and legumes can contribute to obtaining more productive systems. The objective of this study was to evaluate the effects of spatial arrangement of intercropped glyphosate-tolerant soybean (RR) and RR corn on silage yield and weed community. The experiment was implemented in the experimental field of the IF Goiano – Campus Rio Verde, and in the experimental field of the Lutheran Institute of Higher Education of Itumbiara-GO, ILES/ULBRA. In both localities, five treatments were tested: T1 – soybean monoculture with a spacing of 0.5 m (24 plants m-1); T2 – maize monoculture with 0.5 m spacing (3 plants m-1); T3 – maize monoculture with 1.0 m spacing (6 plants m-1); T4 – Corn intercropped with soybeans in a simple arrangement system (alternating rows), with a single spacing of 0.5 m between rows (6 corn plants m-1 – 24 soybean plants m-1); and T5 – Corn intercropped with soybeans in a double arrangement (double rows of corn, alternating with a row of soybeans), with a single spacing of 0.5 m (3.75 plants m-1 of corn – 24 plants m-1 of soybeans ). Intercropped systems in alternate rows and in double rows do not result in an increase in dry mass yield of the mixed silage. There was influence of locations on the yield of corn silage in the monoculture, and in Itumbiara, with a spacing of 1.0 m, a higher yield of silage was obtained, while in Rio Verde, it was obtained in the alternating row system. Regarding the weed community, the lowest population and dry mass accumulation was observed in the soybean monoculture grown in Rio Verde.