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[目的]研究土壤侵蚀对坡耕地生产力的影响。[方法]通过红壤旱坡地铲土覆土微区试验,研究土壤侵蚀对坡耕地生产力的影响。[结果]结果表明,覆土厚度与玉米籽粒产量、秸秆产量均呈极显著正相关,表明随着坡耕地表土冲刷损失数量的增加,玉米籽粒和秸秆产量极显著减产。铲除耕作层熟化表土15cm,玉米籽粒减产29.62%,秸秆减产24.46%;铲除耕作层熟化表土10cm,玉米籽粒减产17.31%,秸秆减产20.14%;铲除耕作层熟化表土5cm,玉米籽粒减产12.69%,秸秆减产11.51%;覆土耕作层熟化表土5cm,玉米籽粒增产10.00%,秸秆增产9.35%;覆土耕作层熟化表土10cm,玉米籽粒增产15.77%,秸秆增产16.19%;覆土耕作层熟化表土15cm,玉米籽粒增产17.69%,秸秆增产25.18%。[结论]本研究为评估坡耕地水土流失的影响提供了依据。
[Objective] The research aimed to study the influence of soil erosion on the productivity of sloping arable land. [Method] Through soil micro-area test of shovel soils in red soil, the influence of soil erosion on productivity of sloping land was studied. [Result] The results showed that the thickness of covering soil had a very significant positive correlation with the grain yield of maize and the yield of straw, which showed that the yield of corn grain and straw was significantly reduced with the increase of erosion loss on the surface soil of sloping land. Eradication of cultivated layer matured topsoil 15cm, corn grain yield reduction of 29.62%, 24.46% reduction of straw; eradication of cultivated layer of topsoil 10cm, corn grain yield reduction of 17.31%, 20.14% reduction of straw; eradication farming layer matured topsoil 5cm, corn grain yield reduction of 12.69% The yield of corn is 15.5%; the yield of cured soil is 15%; the yield of corn is increased by 16.19%; the covered soil is 15cm, the output of corn is increased 17.69%, straw yield 25.18%. [Conclusion] This study provided the basis for assessing the impact of soil and water loss on sloping farmland.