Produtividade da soja em diferentes níveis de cobertura vegetal

Abstract

The objective of this study was to evaluate the productivity of soybeans sown at different levels of vegetation cover, under no-tillage system (NTS). The experiment was conducted at the Experimental Farm of Agrarian Sciences UFGD in the city of Dourados, MS, in crop 2016-2017. It was used a randomized block design with seven arrangements in four replicates, with corn (Zea mays) seeded single; brachiaria xaraés (Brachiaria brizantha cv Xaraés) seeded single; brachiaria xaraés (Brachiaria brizantha cv Xaraés) intercropped with corn; brachiaria piatã (Brachiaria brizantha - BRS Piatã) seeded single; brachiaria Piatã (Brachiaria brizantha - BRS Piatã) intercropped with corn; brachiaria ruziziensis (Brachiaria ruziziensis) seeded single; brachiaria ruziziensis (Brachiaria ruziziensis) intercropped with corn. The plant height, first pod height, number of pods per plant and mass of 1000 grains had no significant effect. The analysis of variance for yield and soil cover characteristics showed that there was a significant difference between the studied treatments. For the soil cover, the highest average was obtained in the arrangement with Brachiaria brizantha cv Xaraés in single crop, and the lowest with single corn. Higher seed yields of soybean were obtained with the coverages of (Brachiaria ruziziensis, consortium Maize + Brachiaria ruziziensis, Brachiaria brizantha - BRS Piatã, and the lowest with single corn.