喀斯特山地不同人工林土壤特性差异与综合评价  

Difference and integrated evaluation on soil fertility properties of different plantations in Karst area

作　　者：戎宇[1] 刘成刚[1] 薛建辉[1] 

机构地区：[1]南京林业大学,江苏省林业生态工程重点实验室,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2011年第2期108-112,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：“十一五”国家科技支撑计划(2006BAD03A0303)

摘　　要：通过野外采样和室内分析,研究贵州喀斯特山地不同人工林土壤特性的差异及影响因子,选择12个能反映土壤肥力质量的定量指标,采用主成分分析方法,对滇柏、桤木、杜仲、刺槐和冰脆李共5种人工林的土壤肥力进行综合评价。结果表明:(1)5种人工林土壤理化及酶活性间存在较大差异,不同林分土壤酶活性和土壤理化性质之间的相关性也存在明显差异;(2)采用PCA综合评判法可知,提取的3个主成分能反映土壤全部指标信息的93.44%;(3)不同林分土壤肥力综合指标值从大到小依次为桤木林、刺槐林、杜仲林、冰脆李林、滇柏林。Difference in soil fertility were investigated for different plantations in Karst area by field sampling and lab analysis.12 indices were selected and the methods of principal component and cluster analysis were used to evaluate soil fertility quality of five different plantations,including Robinia pseudoacacia,Eucommia ulmoides,Alnus cremastogyne,Cupressus duclouxiana and Prunus salicina.The results showed there existed great difference of soil physical,chemical properties and soil enzyme activities among five different plantations;the significant difference also exist in the correlation between different types of soil enzyme activities and soil physical and chemical properties.By means of PCA method,three principal components selected could reflect 93.44 percent of information which represented by soil fertility indices.The order of soil integrated fertility index value of five different plantations was A.cremastogyne,R.pseudoacacia,E.ulmoides,P.salicina and C.duclouxiana.

关 键 词：喀斯特山地 人工林 土壤肥力 综合评价 

分 类 号：S714.8[农业科学—林学]