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本文对条带式补播改良天然划坡的水土保持效益进行了研究。其结果表明,用条带式改良陡坡草地。其风干划产量较天然草地提高1.76～2.25倍,草群中豆科牧划的比重由原业的24.04％增加到75.46％,有毒有害植物明显减少,植被覆盖度由42.5％增加到83.5％,且改变了植物群落结构。改良草地的地表径流比天然草地减少13.14％,土壤冲刷减少28.08％,为有效地控制地表土壤水分和养分的流失创造了条件,提高了水土保持效益,并为黄土高原丘陵沟壑区陡坡划地的改良提供了依据。
This paper studies the benefits of strip-based replanting to improve soil and water conservation. The results show that the use of strip-type steep grassland improvement. The air-dried planted area increased 1.76-2.25 times that of the natural grassland. The proportion of leguminous pasture planted in the grassland increased from 24.04% to 75.46% of the original industry, the number of toxic and harmful plants decreased significantly, and the vegetation coverage increased from 42.5% to 83.5% And changed the plant community structure. The surface runoff of the improved grassland decreased by 13.14% and the soil erosion decreased by 28.08% compared with the natural grassland, which provided the conditions for effectively controlling the loss of soil moisture and nutrients and improved the benefits of soil and water conservation. Provided a basis for improvement.