【作者】 牛德奎； 周桂香； 沈颖胤； 涂淑萍； 张文元； 郭晓敏；

【Author】 Niu Dekui;Zhou Guixiang;Shen Yingyin;Tu Shuping;Zhang Wenyuan;Guo Xiaomin;Jiangxi Agriculture University;

【机构】 江西农业大学；

【摘要】 本研究以江西省赣县稀土尾砂矿区一年生、两年生和四年生桉树林下土壤为研究对象,以裸露的尾矿空地为对照,对赣南稀土尾矿区土壤抗蚀性进行了研究。结果表明:(1)通过主成分分析,筛选出>0.5mm水稳性团聚体含量、>0.25mm水稳性团聚体含量、>0.25mm团聚体破坏率、分散系数、团聚度、<0.05mm粉粘粒含量、<0.001mm粘粒含量7个最佳土壤抗蚀性评价指标,并得出该区土壤抗蚀性综合指数方程为:Y=0.603Y1+0.272Y2+0.126Y3;(2)稀土尾砂矿区不同林龄桉树林下土壤抗蚀性存在较大差异,土壤抗蚀性指数规律表现为:两年生桉树>一年生桉树>四年生桉树>空地;(3)团聚体类、水稳性团聚体以及粘粒类指标与土壤抗蚀性综合指数显著相关。更多还原

【Abstract】 This study chosen one year old,two year old,four year old Eucalyptus and open space for the control as the research object on rare earth tailings mining area in Ganxian country,Jiangxi Province.The results as follows:(1) By using principal component analysis,the study had chosen 7 indicators as the best indicators to reflect the soil anti erodibility on rare earth tailings mining area.They were > 0.5mm water stable aggregate content,>0.25 mm water stable aggregate content,>0.25 mm aggregate destruction rate,dispersion coefficient,degree of aggregation,<0.05 mm clay content,<0.001 mm clay content.The soil anti erodibility equation to the area is;Y = 0.603Y1+0.272Y2+0.126Y3。(2) There are difference on soil anti erodibility between different forest age of Eucalyptus plantation on rare earth tailings mining area.Score on soil anti erodibility index were:two years old eucalyptus>annual eucalyptus>four years old eucalyptus>open space.(3) Aggregate,water stable aggregates and clay indexes were significant or extremely significan correlation to soil anti erodibility index.更多还原