自然资源学报

自然资源学报 ›› 1999, Vol. 14 ›› Issue (1): 55-61.doi: 10.11849/zrzyxb.1999.01.008

• 论文 • 上一篇    下一篇

土地退化方法应用初步研究——以闽西沙县东溪流域为例

濮励杰1, 包浩生1, D L HIGGITT2   

  1. 1. 南京大学城市与资源学系, 南京210093;
    2. University of Du rham, DH13LE, U K
  • 收稿日期:1998-04-24 修回日期:1998-07-23 出版日期:1999-03-25 发布日期:1999-03-25
  • 作者简介:濮励杰,男,1965年9月生,博士,副教授,中国自然资源学会青年委员会副主任,江苏省地理学会常务 理事兼副秘书长。主要从事土地资源开发利用等研究,已发表学术论文30余篇,参编著作2部。
  • 基金资助:

    英国文化委员会资助项目

THE APPLICATION OF THE NEW METHODS ON LAND DEGRADATION STUDY A CASE STUDY ON DONGXI RIVER BASIN, WESTERN FUJIAN, CHINA

Pu Lijie1, Bao Haosheng1, D L Higgitt2   

  1. 1. Department of Geography, Nanjing University, Nanjing 210093;
    2. Department of Geography, University of Durham, DH1 3LE, UK
  • Received:1998-04-24 Revised:1998-07-23 Online:1999-03-25 Published:1999-03-25

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摘要： 综合运用１３７Ｃｓ、土壤磁测等新技术手段,结合土壤结构水稳性、ＣＥＣ等部分土壤理化指标,对闽西沙县东溪流域坡地不同部位的土地退化特征进行初步的定量研究,结果表明：①土壤中１３７Ｃｓ含量与坡度呈很强的对数关系（Ｒ＝－０８３）,表明土地退化随坡度的增加而加剧；②土壤表层磁化率富集系数与坡度呈较强的对数关系（Ｒ＝－０６３）,表明土地退化随坡度的增加而加剧；③不同地貌部位以及不同的土地利用类型之间,其土壤部分理化指标,在不同的显著性水平上,呈现一定的退化特征。

关键词: 137Cs, 土壤磁测, 土壤侵蚀与土地退化, 坡地

Abstract: The attempts which apply the alternative methods for estimating rapidl soil erosion rates to elusidate the relationship between the land use types and land degradation has been made. The 137Cs measurement, magnetic susceptibility, aggregate stability, and the soil properties have been employed in Dongxi River Basin, a mountainous area of western Fujian. The results reveal that: (a)A plot of 137Cs inventory(Y) against slope angle(X) showing a strong inverse log log relationship(r=-0 83) indicates that much stronger soil erosion occurs on steeper slopes;(b)average soil loss(in thichness 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 respectively; (c)the surface layer enrichment factor of magnetic susceptibility(Y) in soil also shows an inverse log log relationship(r=-0 63) which indicates a similar tendency with the relationship between the 137Cs inventory(Y) against slope angle(X); and (d)the physical and chemical properties of soil among different land use types show different degraded characteristics at different significance levels.

Key words: Cs137 technique, magnetic susceptibility, soil and land, degradation, sloping field

中图分类号: 

  • S157