赣县稀土采矿区巨桉林地土壤抗蚀性评价

通过野外调查与室内分析相结合,应用主成分分析法,从衡量土壤抗蚀性的16个指标中,优化得到赣县稀土采矿区巨桉林地土壤抗蚀性7个最佳评价指标:分散系数(X1)、团聚度(X2)、〉0.25mm水稳性团聚体含量(X3)、〉0.5mm水稳性团聚体含量(X4)、〈0.05mm粉黏粒含量(X5)、〉0.25mm团聚体破坏率(以)和〈0.001mm黏粒含量(X7),并以此为变量分析比较不同林龄巨桉林地土壤抗蚀性变化规律。结果表明:不同林龄巨桉林地土壤抗蚀性综合指数大小为:1年生林地〉2年生林地〉4年生萌芽1a林地〉裸露地。在此基础上,以上述7个评价指标为自变量,以土壤抗蚀性综合指数(Y)为因变量,进行回归分析...

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Published in林业科学研究 Vol. 26; no. 6; pp. 752 - 758
Main Author 涂淑萍 周桂香 郭晓敏 张文元 胡冬南 牛德奎
Format Journal Article
LanguageChinese
Published 江西农业大学林业生态工程研究中心,江西南昌330045 2013
江西农业大学园林与艺术学院,江西南昌,330045%江西农业大学园林与艺术学院,江西南昌330045
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ISSN1001-1498

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Summary:通过野外调查与室内分析相结合,应用主成分分析法,从衡量土壤抗蚀性的16个指标中,优化得到赣县稀土采矿区巨桉林地土壤抗蚀性7个最佳评价指标:分散系数(X1)、团聚度(X2)、〉0.25mm水稳性团聚体含量(X3)、〉0.5mm水稳性团聚体含量(X4)、〈0.05mm粉黏粒含量(X5)、〉0.25mm团聚体破坏率(以)和〈0.001mm黏粒含量(X7),并以此为变量分析比较不同林龄巨桉林地土壤抗蚀性变化规律。结果表明:不同林龄巨桉林地土壤抗蚀性综合指数大小为:1年生林地〉2年生林地〉4年生萌芽1a林地〉裸露地。在此基础上,以上述7个评价指标为自变量,以土壤抗蚀性综合指数(Y)为因变量,进行回归分析,得出稀土采矿区土壤抗蚀性综合评价方程为:Y=0.309X,+0.038X2—0.161X3—0.643X4+0.491 X5-0.0328x6+0.129%+41.637,因子决定系数R2=0.9915,F=49.84,各因子问显著相关,方程拟合较好,可为构建稀土采矿区土壤抗蚀性评价指标体系提供依据。
Bibliography:11-1221/S
TU Shu-ping , ZHOU Gui-xiang , GUO Xiao-min1'2, ZHANG Wen-yuan1"2, HU Dong-nanI, NIU De-kui1'2 ( 1. College of Landscape and Art, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, China; 2. Forest Ecological Engineering Research Center, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, China)
Ganxian County; rare earth mining field; Eucalyptus grandis forest; soil anti-erodibility; evaluation
Soil anti-erodibility is one of the important parameters for evaluating the ability of soil resistance to soil e- rosion. Based on the comprehensive investigation on soil physical and chemical properties, and incorporated into bioindicator, by using principal component analysis, all the 16 anti-erodibility indices could be optimized to 7 indi- ces which were water-stable aggregates at size 〉 0.5 mm and 〉 0.25 mm, destructive rate of aggregates at size 〉 O. 25 mm, coefficient of dispersion, degree of aggregation, viscous grain powder at size 0.05 mm and viscous grain at size 〈 0. 001 mm. The laws
ISSN:1001-1498