经不同措施治理的侵蚀红壤肥力质量综合评价

Integrated evaluation of fertility quality of eroded red soil by ecological restoration measures

利用改进层次分析法,对采用4种生态恢复措施治理的花岗岩红壤侵蚀区的土壤肥力质量进行综合评价.结果表明,采用不同生态恢复措施的土壤肥力质量指数(FI)比对照平均提高了8%-15%.不同措施的FI值大小排列顺序为:果园改造>乔灌草>林草>低效林改造.FI值与评价指标间的相关分析结果表明,土壤有机质、全氮、速效养分和粘粒含量是决定生态恢复区土壤肥力质量的重要指标.

An integrated evaluation of the soil fertility quality in serious granite eroded areas experienced different ecological restora tion was studied by the improved analytic hierarchy method. Soil samples were collected from 4 ecological restoration plots. Results showed that the soil fertility quality index （FI） of four different ecological measures were higher thml control group, increased by 8% - 15%. The sequence of FI was reconstruction orchards 〉 grass mixed with shrub and trees 〉 planted trees and grass 〉 stunted tree rehabilitation. The correlation analysis between FI and evaluation index showed that the factors ＇affecting the soil fertility quality of restoration regions were soil organic nmtter, total nitrogen, available nutrition and clay content.