Soybean yield and grain protein concentration in different soil managements

Abstract

The objective of this work was to evaluate the effects of soil management on soybean grain yield and grain protein and oil concentrations, in long-term experiments. Data from three long-term experiments conducted in Londrina, in the state of Paraná, Brazil, were analyzed in two growing seasons with different water availabilities. Grain yield was higher in the no-tillage system (NTS) compared with treatments with soil mobilization (3,972 kg ha^-1 vs 3,421 kg ha^-1 in the 2022/2023 season and 2,468 kg ha^-1 vs 2,043 kg ha^-1 in the 2023/2024). Grain protein concentration was also higher in treatments under NTS compared to treatments with soil mobilization (382 g kg^-1 vs 370 g kg^-1 in the 2022/2023 season and 382 g kg^-1 vs 371 g kg^-1 in the 2023/2024). Grain oil concentration was lower in the treatments under NTS , when compared with those with soil mobilization (217 g kg^-1 vs 222 g kg^-1 in the 2022/2023 season and 215 g kg^-1 vs 222 g kg^-1 in the 2023/2024). NTS reconciles a greater soybean grain yield with a higher grain protein concentration.