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Pesquisa Agropecuária Brasileira

Print version ISSN 0100-204XOn-line version ISSN 1678-3921

Abstract

ZOLIN, Cornélio Alberto et al. Soil and water losses under crop-forest integration and in soybean-corn succession. Pesq. agropec. bras. [online]. 2016, vol.51, n.9, pp.1223-1230. ISSN 0100-204X.  https://doi.org/10.1590/s0100-204x2016000900022.

The objective of this work was to evaluate, under conditions of natural rainfall, the soil and water losses in crop-forest integration systems or in soybean-corn succession. The experiment was carried out in a clayey Latossolo Vermelho-Amarelo (Oxisol), in a Cerrado/Amazon transition region. The following land use and soil covers were evaluated: crop-forest integration system; soybean-corn+brachiaria succession system; and bare soil. Crops were cultivated under no-tillage in soybean-corn+brachiaria sucession, every year, regardless of the production system. In the three years of evaluation, soil losses by hydraulic erosion were of 0.215 Mg ha-1 per year, in the crop-forest integration system, and of 0.753 Mg ha-1 per year, in the soybean-corn succession system. These values were below the tolerance limit, which is of 11.1 Mg ha-1 per year, and the lowest values for crop-forest integration point towards the great conservation potential of this production system.

Keywords : soil conservation; hydraulic erosion; surface water runoff; no-tillage; water resources; integration systems.

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