向家坝工程扰动区植被恢复土壤质量评价

以向家坝工程扰动区6种植被恢复模式下的土壤为研究对象，综合考虑表征土壤物理、化学和生物特性的25个土壤指标，利用敏感性分析和最小数据集方法进行土壤质量综合评价.结果表明：基于敏感性分析和最小数据集的土壤质量综合评价模型均能有差别的反映不同植被恢复模式对土壤质量和功能的影响；加权算法下基于最小数据集所计算土壤质量综合评价指数（SQI-MWA）能更敏感的反映出植被恢复措施对土壤质量的影响；有机质、全磷和多酚氧化酶能更好反映土壤质量受不同植被恢复方式的影响差异，推荐作为反映向家坝工程扰动区土壤质量的最优指标组合；土壤质量表现为：植被混凝土样地>厚层基材样地>天然林样地>客土喷播样地>框格梁样地>弃渣地.

Assessment of vegetation restoration soil quality in disturbed area in Xiangjiaba Hydropower Project

In this study, soils from 6vegetation restoration modes in the disturbed areas in Xiangjiaba hydropower project were collected, and 25 soil indicators representing soil physical, chemical, and biological characteristics were used to comprehensively evaluate the soil quality by means of sensitivity analysis and minimum data set method. The comprehensive evaluation models of soil quality based on sensitivity analysis and the minimum data set can reflect the impacts of different vegetation restoration modes on soil quality and function differently. The comprehensive evaluation index of soil quality based on the minimum data set under the weighted algorithm (SQI-MWA) can more sensitively reflect the impacts of vegetation restoration modes on soil quality. Organic matter, total phosphorus and polyphenol oxidase can better reflect the differences in the impacts of vegetation restoration modes on soil quality, and are recommended as the best combination of indicators that can reflect the soil quality of study areas in Xiangjiaba hydropower project. The vegetation concrete eco-restoration slope (VC) had the highest soil quality, followed by the thick layer base material spraying slope (TB), natural forest (NF), external-soil spray seeding slope (SS), frame beam filling soil slope (FB), and abandon slag slope (AS).