摘要
采用主成分分析法对云南元谋干热河谷4种植被恢复模式的8个土壤肥力指标进行综合评价,结果显示,8个指标可分为3个主成分:①全磷、全钾、速效钾、有机质、全氮;②水解氮;③速效磷。这3个主成分的累积贡献率为87.763%,能够反映原指标的信息。土壤肥力综合得分显示:阳坡林地>果园林地>罗望子林>阴坡林地。
Using principal component analysis of four vegetation recovery modes in the dry-hot valley, eight comprehensive soil fertility evaluation indicators were studied. Three principal components of cumulative contribution rate of 87.763% to reflect the original target information were found. The 3 principal components were （1）total phosphorus, total potassium, available potassium, soil organic matter, total nitrogen; （2）hydrolysable nitrogen; （3）available phosphorus. The results showed the IFI score was in the following order： sunny slope woodland〉 orchard woodland〉tamarind forest〉shady woodland.
出处
《热带作物学报》
CSCD
2011年第10期1820-1823,共4页
Chinese Journal of Tropical Crops
基金
"长江上游低山丘陵区生态综合治理技术与示范"(No.2011BAC09B05)
云南省科技攻关项目:金沙江干热河谷生态修复技术集成与示范(No.2011CA009)
关键词
土壤肥力
干热河谷
主成分分析
Soil fertility
Dry-hot valley
Principle component analysis
