DISAGGREGATION RATES IN INTERRILLS OF ALFISSOL UNDER SIMULATED RAINFALL - DOI: 10.13083/1414-3984/reveng.v23n2p154-161

• Autor(a) principal: Santos, Fernando André Silva
• Data de Publicação: 2015
• Outros Autores: Moitinho Nunes, Maria Candida, Faria Júnior, Cleonir Andrade, Arantes, Eurípedes Maximiano, Júnior, Santino Seabra
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Engenharia na Agricultura
• Texto Completo: https://periodicos.ufv.br/reveng/article/view/510
• topic: cobertura vegetal; erosão hídrica; sedimentos

Water erosion reduces the productive capacity of soils and increases the amount of sediments and pollutants in water bodies. Soil loss by erosion in interrills of an Alfissol, with and without the presence of vegetation cover was evaluated. The study was conducted in the experimental area of the Mato Grosso Research Enterprise and Rural Extension/EMPAER. We used two conditions of soil management: a) plowed with disc harrow and without the presence of vegetation cover; b) plowed with disc harrow and with the presence of vegetation cover. Soil losses were quantified based on sediment lost. Samples were collected during 75 minutes of simulated rainfall with an intensity of 80 mm h-1. The bare soil showed higher disaggregation rates compared to the soil with vegetation cover, indicating that the use of vegetation contributes to dissipation of the kinetic energy of raindrops. The behavior exhibited by the disaggregation rate curves indicates that at the beginning of precipitation, the surface flow is relatively small, having no capacity to carry all the disaggregated material. The presence of vegetation greatly reduced the disaggregation process and transport of soil particles in interrills.