Author(s): XAVIER, W. D.; CARNEIRO, L. F.; GUIMARÃES, C. M.; SILVA, J. V. de S.; PINTO, F. A.; RIBEIRO, D. O.; SOUSA, V. S.; RESENDE, A. V. de

Summary: Soils with improved fertility indicate opportunities for more rational use of fertilizers. The objective of this study was to evaluate the management of potassium fertilization in the succession of soybean-corn in soil with improved fertility, in the southwestern region of the state, Goiás. The experiment was set in 5×3 factorial scheme, arranged in randomized blocks with four repetitions. The treatments consisted of the combination of potassium doses (0, 40, 80, 120 and 160 kg ha-1 of K2O) and seasons of application (100% of the dose in pre-planting, 100% of the dose in coverage and in installments with 50% of the dose in pre-planting + 50% in coverage). The best performance of soybean, considering grain yield, was obtained with the parceled application of 80 kg ha-1 of K2O, with production of 3.6 Mg ha-1. The highest corn production was obtained with the anticipated application of 160 kg ha-1 of K2O in soybean. In the management of potassium fertilization in improved fertility soil in the soybean-corn succession, the parceled application of 120 kg ha-1 of K2O kept the available K reserve in the soil constant when compared to its initial content.

Publication year: 2019

Types of publication: Journal article

Unit: Embrapa Maize & Sorghum

Keywords: Ciclagem de nutrientes, Glycine Max, Grão, Plantio Direto, Rendimento, Soja