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通过在云南红壤坡耕地上建造径流小区,研究了自然降雨情况下6种不同农作处理的水土流失特征。结果表明:横坡垄作能有效减缓强降雨对坡耕地的侵蚀,减少径流流失,但不能有效防治长降雨的持续冲刷;顺坡垄作对强降雨和长降雨的侵蚀都不能有效减少水土流失。烤烟的不同生长时期对水土流失的影响因素不同。烤烟生长前期,垄作方式是影响水土流失的主要因素;在烤烟生长进入成熟期后,各处理间的泥沙流失量差异都不显著,各处理的地表植被覆盖率都达到最大化,地表植被覆盖率成为影响水土流失的主要因素。
Through the construction of runoff plots on sloping arable land in red soil of Yunnan Province, the characteristics of soil and water loss under six different cropping processes under natural rainfall were studied. The results showed that horizontal slope ridge can effectively reduce heavy rains erosion on sloping farmland, reduce runoff loss, but can not effectively prevent long-lasting erosion. Long slope erosion can not effectively reduce soil erosion. Flue-cured tobacco in different growth stages of soil erosion factors. In the early stage of flue-cured tobacco cultivation, the ridge-planting mode was the main factor affecting water and soil loss. After the growth of flue-cured tobacco reached the maturity stage, there was no significant difference in the amount of sediment loss among the treatments. The surface vegetation coverage of each treatment was maximized. Rate has become a major factor affecting soil and water loss.