如何评价黄土高原自然侵蚀与人为加速侵蚀作用，恢复与重建植被的可能性和必要性等是近年来治理黄河的热点问题。通过定位试验和野外调查，研究了黄土高原子午岭林区植被破坏对土壤理化特性以及土壤侵蚀过程演变的影响；分析了人为破坏植被耕垦后坡面土壤侵蚀特征与土壤退化过程。表明：植被是影响土壤侵蚀最敏感的因子；人为破坏植被造成的加速侵蚀，是导致土壤退化和生态环境恶化的主要原因；恢复和重建植被，应为黄土高原加速治理和减少入黄泥沙的根本措施。%There have been many arguments on how to evaluate the naturalerosion and man_made accelerated erosion, the possibility to recover and rebuild vegetation on loess plateau. Using the methods of typical region investigation, experimental study in site, and chemical analysis of samples, impact of forest vegetation destruction on the processes of man_made accelerated erosion and soil degradation in Zhiwuling area have been analysed and discussed. The results have shown that the factors of vegetation and soil are highly sensitive factors of affection soil erosion. Man_made accelerated erosion caused by forest vegetation destruction is soil degradation and eco_environmental deterioration. The recover and rebuild vegetation are principal countermeasures to reduce sediment of Yellow river and accelerated comprehensive controlling on loess plateau.
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