| 中国亚热带地区土地退化的分布及评价－以福建省东溪流域为例 |
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| 引用本文： | PU Li-Jie,BAO Hao-Sheng,PENG Bu-Zhuo,D. L. HIGGITT. 中国亚热带地区土地退化的分布及评价－以福建省东溪流域为例[J]. 土壤圈, 1998, 8(3): 201-210 |
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| 作者姓名： | PU Li-Jie BAO Hao-Sheng PENG Bu-Zhuo D. L. HIGGITT |
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| 作者单位： | [1]DepartementofGeography,NanjingUniversity,Nanjing210093（China） [2]DepartementofGeography,UniversityofDurh |
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| 基金项目： | *1Sponsored by British Council (approved number SHA 0992/259). |
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| 摘 要： | Some alternative mehods for estimating soil erosion rates rapily were used to elucidate the relationship between the land use types and land degradation.The ^137Cs content,magnetic susceptibility,aggregate stability,and soil properties were studied in the Dongxi River Basin, a mountainous area of ewstern Fujian, A plot of ^137Cs inventory(Y) against slope angle(X) shows a strong inverse log-log relationship(r=-0.83), indicating that muh more soil erosion occurs on steeper slopes.Average soil loss(in thickness of top soil per year) in the past 30 years for arable slope crest,arable slopes and tea plantation slopes are 1.6,10.4 and 8.0 mm year^-1 respectively,The surface layer enrichment factor of magnetic susceptibility(Y) in soil aslo shows an inverse log-log relationship (r=-0.63), indicating a similar tendency with the realtionship between the ^137Cs inventory(Y) against slope angle (X).The Physical and chemical properties of soils among different land use types show different degraded characteristics at different significant levles.
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| 关 键 词： | 土地评估 土地退化 亚热带地区 中国 福建 土地利用类型 土壤物理化学 铯 |
Distribution and assessment of soil and land degradation in subtropical China--A case study of Dongxi River Basin, Fujian Province |
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| PU Li-Jie,BAO Hao-Sheng,PENG Bu-Zhuo and D. L. HIGGITT. Distribution and assessment of soil and land degradation in subtropical China--A case study of Dongxi River Basin, Fujian Province[J]. Pedosphere, 1998, 8(3): 201-210 |
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| Authors: | PU Li-Jie BAO Hao-Sheng PENG Bu-Zhuo D. L. HIGGITT |
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| Affiliation: | Department of Geography, Nanjing University, Nanjing 210093 China. |
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| Abstract: | Some alternative mehods for estimating soil erosion rates rapily were used to elucidate the relationship between the land use types and land degradation.The ^137Cs content,magnetic susceptibility,aggregate stability,and soil properties were studied in the Dongxi River Basin, a mountainous area of ewstern Fujian, A plot of ^137Cs inventory(Y) against slope angle(X) shows a strong inverse log-log relationship(r=-0.83), indicating that muh more soil erosion occurs on steeper slopes.Average soil loss(in thickness of top soil per year) in the past 30 years for arable slope crest,arable slopes and tea plantation slopes are 1.6,10.4 and 8.0 mm year^-1 respectively,The surface layer enrichment factor of magnetic susceptibility(Y) in soil aslo shows an inverse log-log relationship (r=-0.63), indicating a similar tendency with the realtionship between the ^137Cs inventory(Y) against slope angle (X).The Physical and chemical properties of soils among different land use types show different degraded characteristics at different significant levles. |
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| Keywords: | 137Cs technique magnetic susceptibility soil and land degradation subtropical environment |
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