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城市森林土壤肥力质量指标筛选——以南京市为例

作  者:
单奇华;俞元春;张建锋;虞木奎;成向荣
单  位:
中国林业科学研究院亚热带林业研究所;南京林业大学森林资源与环境学院
关键词:
城市森林土壤;相关性;聚类分析;指标筛选
摘  要:
土壤质量指标的筛选是科学地进行土壤质量评价的前提。本文以城市森林土壤为研究对象,探讨了土壤肥力指标的筛选方法。采集南京市不同功能区森林土壤样品(0~20cm),分析了24个土壤质量指标。根据指标间的相关性和聚类分析结果,筛选出体积质量(容重)、黏粒含量、分散系数、可蚀性因子K值、水稳性指数、pH值、有机质、速效钾和纤维素酶活性,共9个指标作为城市森林土壤肥力质量评价的因子。
译  名:
Determination of Fertility Index of Urban Forest Soil in Nanjing City
作  者:
SHAN Qi-hua1,2, YU Yuan-chun1, ZHANG Jian-feng2, YU Mu-kui2, CHENG Xiang-rong2 (1 College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; 2 Institute of Subtropical Forestry, Chinese Academy of Forest, Fuyang, Zhejiang 311400, China)
关键词:
Urban forest soil, Correlations, Cluster analysis, Indicators pick
摘  要:
It is necessary to establish the proper indicators for soil quality assessment. In this paper a method with Peason two-tailed bivariate correlations and Cluster analysis was applied for the determination of soil quality index of urban forest soil. Urban soil samples at 0-20 cm depths were collected from the forests in Nanjing at different functional areas, and 24 soil indicators were analyzed in lab, finally 9 of soil indicators were selected to compose the minimum factor set for the fertility assessment of urban forest soil, including soil bulk density, clay content, dispersion coefficient, erodibility K values, water stable index, pH, organic matter, available potassium, and cellulase activity.

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