Water erosion and soil water infiltration in different stages of corn development and tillage systems

Revista Brasileira de Engenharia Agrícola e Ambiental

Santos, Lucas A. F.²  Almeida, Wilk S. de²  Alves Sobrinho, Teodorico¹  Carvalho, Daniel F. de²  Eduardo, Eliete N.³ 

[1] Universidade Federal de Mato Grosso do Sul, Campo Grande, Brazil;Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil;Universidade Federal de Lavras, Lavras, Brazil

关键词: soil loss;    infiltration rate;    soil tillage;    rainfall simulator;   

DOI  :  10.1590/1807-1929/agriambi.v19n11p1072-1078

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

This study evaluated soil and water losses, soil water infiltration and infiltration rate models in soil tillage systems and corn (Zea mays, L.) development stages under simulated rainfall. The treatments were: cultivation along contour lines, cultivation down the slope and exposed soil. Soil losses and infiltration in each treatment were quantified for rains applied using a portable simulator, at 0, 30, 60 and 75 days after planting. Infiltration rates were estimated using the models of Kostiakov-Lewis, Horton and Philip. Based on the obtained results, the combination of effects between soil tillage system and corn development stages reduces soil and water losses. The contour tillage system promoted improvements in soil physical properties, favoring the reduction of erosion in 59.7% (water loss) and 86.6% (soil loss) at 75 days after planting, and the increase in the stable infiltration rate in 223.3%, compared with the exposed soil. Associated to soil cover, contour cultivation reduces soil and water losses, and the former is more influenced by management. Horton model is the most adequate to represent soil water infiltration rate under the evaluated conditions.

【 授权许可】

Unknown