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通过红壤旱坡地铲土覆土微区试验,模拟土壤侵蚀对坡耕地生产力的影响。结果表明,覆土厚度与玉米籽粒产量、秸秆产量呈极显著正相关,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15 cm,玉米减产29.62%;铲除耕作层熟化表土10 cm,玉米减产17.31%;铲除耕作层熟化表土5 cm,玉米减产12.69%;覆土耕作层熟化表土5 cm,玉米增产10.00%;覆土耕作层熟化表土10 cm,玉米增产15.77%;覆土耕作层熟化表土15 cm,玉米增产17.69%。
Through soil micro-area test of shoal soils in red soil, the influence of soil erosion on the productivity of sloping land was simulated. The results showed that there was a significant positive correlation between soil cover thickness and corn grain yield and straw yield, indicating that the yield of corn grain and straw decreased significantly with the increase of erosion loss on the topsoil. 15 cm of maize was eradicated, 10.69% of maize was eradicated, 5 cm of cured topsoil was eroded, 5 cm of maize was increased by 10.00 per mu of topsoil, %. Curing soil topsoil 10 cm, corn yield 15.77%; Clay topsoil curing surface 15 cm, corn yield 17.69%.