Residual effect of soil tillage on water erosion from a Typic Paleudalf under long-term no-tillage and cropping systems

Revista Brasileira de Ciência do Solo

Mastrângello Enívar Lanzanova²  Flávio Luiz Foletto Eltz¹  Rodrigo Da Silveira Nicoloso¹  Elemar Antonino Cassol¹  Ildegardis Bertol¹  Telmo Jorge Carneiro Amado¹  Vitor Cauduro Girardello¹ 

[1] ,State University of Rio Grande do SulTrês Passos RS ,Brazil

关键词: cover crops;    water runoff;    soil erosion;    plantas de cobertura;    escoamento superficial de água;    erosão do solo;   

DOI  :  10.1590/S0100-06832013000600025

来源: SciELO

【 摘 要 】

Soil erosion is one of the chief causes of agricultural land degradation. Practices of conservation agriculture, such as no-tillage and cover crops, are the key strategies of soil erosion control. In a long-term experiment on a Typic Paleudalf, we evaluated the temporal changes of soil loss and water runoff rates promoted by the transition from conventional to no-tillage systems in the treatments: bare soil (BS); grassland (GL); winter fallow (WF); intercrop maize and velvet bean (M+VB); intercrop maize and jack bean (M+JB); forage radish as winter cover crop (FR); and winter cover crop consortium ryegrass - common vetch (RG+CV). Intensive soil tillage induced higher soil losses and water runoff rates; these effects persisted for up to three years after the adoption of no-tillage. The planting of cover crops resulted in a faster decrease of soil and water loss rates in the first years after conversion from conventional to no-tillage than to winter fallow. The association of no-tillage with cover crops promoted progressive soil stabilization; after three years, soil losses were similar and water runoff was lower than from grassland soil. In the treatments of cropping systems with cover crops, soil losses were reduced by 99.7 and 66.7 %, compared to bare soil and winter fallow, while the water losses were reduced by 96.8 and 71.8 % in relation to the same treatments, respectively.

【 授权许可】

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