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黄土高原地区植被稀疏,坡陡沟深,土质疏松,水土流失严重,生态环境日益恶化。对黄土高原地区多年水土保持造林、种草和封坡禁牧等措施的蓄水保土效益及毁林毁草后水土保持效益减退情况进行的研究表明:沟谷林、沙棘林、人工林等均可有效地减少径流量和土壤侵蚀量,具有较好的蓄水保土效益;森林被破坏对流域年径流总量影响较小,对径流年内分配影响较大;在黄土高塬沟壑区退耕地种植草木樨,可有效地减少冲刷量和径流量。
Loess Plateau vegetation is sparse, steep slopes deep, loose soil, soil erosion is serious, the ecological environment is deteriorating. The results of soil and water conservation benefits of afforestation by soil and water conservation, grazing and grazing ban on grazing for many years in the Loess Plateau, and the decrease of soil and water conservation benefits after deforestation have shown that: Gully, Seabuckthorn and plantation Can effectively reduce the amount of runoff and soil erosion, has better water and soil conservation benefits; forest destruction has a small impact on the annual runoff total impact on runoff distribution of large impact; in the gully area of the Loess Plateau Planting grass 樨, can effectively reduce erosion and runoff.