黄土高原沙棘人工林地土壤抗蚀性指标探讨

Soil Antierodibility Indexes of Hippophae Rhamnoides Forest in Loess Plateau

抗蚀性是与抗冲性既有联系，又有区别的一个衡量土壤抗侵蚀能力的重要指标。在黄土高原的两大侵蚀类型区——高塬沟壑区、丘陵沟壑区，分布着数百万公顷沙棘人工林，其抗侵蚀能力愈来愈受关注。要正确评价沙棘人工林的抗蚀功能，一个科学、有效、便利的评价体系是不可缺少的。在反映土壤抗蚀性的纷杂繁多的指标中，经过主成分分析，筛选出了符合不同精度要求的“最佳指标”、“最佳２指标”、“最佳３指标”等评价体系。

Antierodibility is one important index to estimate soil antierosion capacity which has relation and difference with antiscouring ability.There are thousands of hundreds hectare Hippophae rhamnoides forest in loess plateau region, and its antierosion capacity has been paid more and more attention. One scientific,effective and advantage evaluation system is essential to evaluate antierosion capacity of Hippophae rhamnoides forest. Using principal component analysis,different evaluation system—“Optimum 1 Index”,“Optimum 2 Indexes”,and “Optimum 3 Indexes ”are chosen among many indexes .