西南林业大学学报2016，Vol.36Issue(2)：17-24,8.DOI:10.11929/j.issn.2095-1914.2016.02.003
不同林龄华北落叶松人工林地土壤肥力评价
Assessment of Soil Fertility in Different Aged Larix principis-rupprechtii Plantation
摘要
Abstract
The level of soil fertility of different aged(5 -,10-,and 20-year-old)Larix principis-ruppre-chtii plantation was assessed by using the method of principal component analysis,Norm value and membership function of fuzzy mathematic.The study found that the minimum data set of soil assessment comprises organic car-bon,total nitrogen,nitrate nitrogen,ammonium nitrogen,available phosphorus,available potassium,acid phos-phatase,urease and invertase.The value of available phosphorus was the smallest,the number was 0.14,and the ammonium nitrogen and urease took the second place,the number was 0.26.On the contrary,the membership val-ue of available potassium and sucrose were maximal,reach to 0.75 and 0.74,respectively;In different aged Larix principis-rupprechtii plantation,the value of soil comprehensive quality index fall in between 0.43 and 0.57.Soil fertility showed a declining trend with age,the sequence is 5a>10a>20a;The consumption rate of phosphorus was more quickly than that of nitrogen,the rate was 9.94% and 1.1 1% respectively,so the restriction of phos-phorus on the growth of Larix principis-rupprechtii will increasingly prominent.关键词
华北落叶松/人工林/土壤肥力评价/主成分分析/隶属度函数Key words
Larix principis-rupprechtii/plantation/soil fertility assessment/principal component analysis (PCA)/membership function分类
农业科技引用本文复制引用
王玲玲,徐福利,王渭玲,赵海燕,孙鹏跃,白小芳..不同林龄华北落叶松人工林地土壤肥力评价[J].西南林业大学学报,2016,36(2):17-24,8.基金项目
“十二五”国家重点基础研究发展计划项目（2012CB416902）资助。 （）
