| 树的年轮和土壤中元素含量的长期分布情况 |
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| 作者姓名： | ZHANG Ming-Kui KE Zi-Xia |
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| 作者单位： | [1]LMCP,InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008（China） [2]DepartmentofUrbanandResourcesScience,NanjingUniversity,Nanjing210093（China） |
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| 基金项目： | *1Project supported by the Natural Science Foundation of Zhejiang Province (No.M403038). |
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| 摘 要： | Soil erosion accelerates soil degradation. Some natural soils and cultivated soils on sloping land in southern Jiangsu Province, China were chosen to study soil degradation associated with erosion. Soil erosion intensity was investigated using the ^137Cs tracer method. Soil particle-size distribution, soil organic matter (OM), total nitrogen (TN) and total phosphorus (TP) were measured, and the effects of erosion on soil physical and chemical properties were analyzed statistically using SYSTAT8.0. Results indicated that erosion intensity of cultivated soils was greater than that of the natural soils, suggesting that cultivation increased soil loss. Erosion also led to an increase of coarser soil particle proportion, especially in natural soils. In addition, silt was the primary soil particle lost due to erosion. However, in cultivated fields, coarser soil particles over time were attributed not only to soil erosion but also to mechanical eluviation as a result of farming activities. Moreover, erosion caused a decrease in soil OM, TN and TP as well as thinning of the soil layer.
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| 关 键 词： | 土壤侵蚀 土壤退化 化学成分 氮 磷 |
Copper and zinc enrichment in different size fractions of organic matter from polluted soils |
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| ZHANG Ming-Kui,KE Zi-Xia.Copper and zinc enrichment in different size fractions of organic matter from polluted soils[J].Pedosphere,2004,14(1):27-36. |
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| Authors: | ZHANG Ming-Kui and KE Zi-Xia |
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| Institution: | College of Natural Resource and Environmental Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: mkzhang@zju.edu.cn;College of Natural Resource and Environmental Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: mkzhang@zju.edu.cn |
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| Abstract: | Soil erosion accelerates soil degradation. Some natural soils and cultivated soils on sloping land in southern Jiangsu Province, China were chosen to study soil degradation associated with erosion. Soil erosion intensity was investigated using the ^137Cs tracer method. Soil particle-size distribution, soil organic matter (OM), total nitrogen (TN) and total phosphorus (TP) were measured, and the effects of erosion on soil physical and chemical properties were analyzed statistically using SYSTAT8.0. Results indicated that erosion intensity of cultivated soils was greater than that of the natural soils, suggesting that cultivation increased soil loss. Erosion also led to an increase of coarser soil particle proportion, especially in natural soils. In addition, silt was the primary soil particle lost due to erosion. However, in cultivated fields, coarser soil particles over time were attributed not only to soil erosion but also to mechanical eluviation as a result of farming activities. Moreover, erosion caused a decrease in soil OM, TN and TP as well as thinning of the soil layer. |
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| Keywords: | copper enrichment particulate organic matter zinc |
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