Agronomic performance of soybean in succession to off-season pastures with Urochloa mixes
Keywords:
Glycine max, Brachiaria, grass mixture, integrated crop-livestock system, off-season cattleAbstract
The objective of this work was to evaluate the agronomic performance of soybean in succession to off-season pastures with Urochloa mixes, in sandy soil. The experiment was carried out in a sandy Oxisol, located in the municipality of Caiuá, in the state of São Paulo, Brazil, in a randomized complete block design, with four replicates. The 2020/2021, 2021/2022, and 2022/2023 harvests were evaluated in the following systems: off-season pasture of Urochloa ruziziensis, off-season pasture of 'BRS Paiaguás' Urochloa brizantha, off-season pasture of 50% U. ruziziensis and 50% 'BRS Paiaguás' U. brizantha, off-season pasture of 67% U. ruziziensis and 33% 'BRS Paiaguás' U. brizantha, fallow under no‑tillage, and fallow under conventional tillage (harrowing). Pods per plant, grains per pod, grains per plant, and grain mass did not differ between the systems. Plant height and cumulative yield over three years stood out in the systems with BRS Paiaguás and the mixes with U. ruziziensis. The agronomic performance of soybean cultivated in sandy soil is benefited by the previous use of off-season pastures, with similar effects between pastures of U. ruziziensis and 'BRS Paiaguás' U. brizantha exclusively or mixed in different proportions.
