Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS

Relationships between Soil Loss Tolerance and Karst Rocky Desertification

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  • 1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, CAS, Guiyang 55000;
    2. Puding Monitoring and Research Station for Karst Ecosystem, CAS, Puding 562100, China

Received date: 2010-11-24

  Revised date: 2011-01-19

  Online published: 2011-08-20

Abstract

To understand the relationships between soil loss tolerance (T value) and karst rocky desertification (KRD), T value was calculated using digital-distribution map of carbonate rock assemblages types in this paper, based on pedospheric system theory. And the impacts of T value on KRD were discussed also based on GIS and field survey comprehensively. The results showed that: 1) T values in karst areas can be divided into three categories, which are 20,100 and 250 t·km-2·a-1 respectively in the purest, purer and nonpure carbonate rock areas but only less than 20 t·km-2·a-1 in rocky mountain region. 2) In the three carbonate areas where T=20,100 and 250 t·km-2·a-1 respectively, KRD incidence rates are 29.86%, 28.12% and 23.25% with KRD severity being 73.55%, 60.57% and 52.19%. Therefore, T value in karst areas is very low, and has such characteristics as diversity and heterogeneity in spatial distribution. T value has great impacts on incidence rate and severity of rocky desertified land. In the same social context, or neglecting the differences of human activities, the lower T value is, the smaller the threshold, the weaker anti-jamming capability is, the higher KRD incidence rate is, and the more KRD severity is.

Cite this article

BAI Xiao-yong, WANG Shi-jie . Relationships between Soil Loss Tolerance and Karst Rocky Desertification[J]. JOURNAL OF NATURAL RESOURCES, 2011 , 26(8) : 1315 -1323 . DOI: 10.11849/zrzyxb.2011.08.012

References

[1] YUAN Dao-xian. Rock desertification in the subtropical karst of South China [J]. Zeitschrift für Geomorphologie N. F.,1997,108(2):81-90. [2] WANG Shi-jie, LI Rui-ling, SUN Chen-xin. How types of carbonate rock assemblages constrain the distribution of karst rocky desertified land in Guizhou Province, P R China: phenomena and mechanisms [J]. Land Degradation & Development,2004,15(1): 123-131. [3] 曹建华,蒋忠诚,杨德生.我国西南岩溶区土壤侵蚀强度分级标准研究[J].中国水土保持科学,2008,6(6):1-7. [4] 曹建华,蒋忠诚,杨德生.贵州省岩溶区水土流失、石漠化受岩溶环境制约[J].中国水土保持科学,2009,7(1):20-23. [5] 曹建华,蒋忠诚,杨德生.中国西南岩溶区土壤允许流失量及防治对策[J].中国水土保持科学,2009,6(12):40-45. [6] 周忠发,安裕伦.贵州省水土流失遥感现状调查及空间变化分析[J].水土保持通报,2000,12(6):23-41. [7] LIU G C, WU L. Determination of soil loss tolerance of an Entisol in Southwest China [J]. Soil Science Society of American Journal, 2009,73(2):412-417. [8] 柴宗新.试论广西喀斯特区的土壤侵蚀[J].山地研究(现山地学报),1989,7(4):255-260. [9] 陈晓平.喀斯特山区环境土壤侵蚀特性的分析研究[J].土壤侵蚀与水土保持学报,1997,13(4):31-36. [10] 李阳兵,王世杰,魏朝富.贵州省碳酸盐岩地区土壤允许流失量的空间分布[J].地球与环境,2006,34(4):36-40. [11] 张信宝,王世杰,曹建华.西南喀斯特山地的土壤硅酸盐矿物物质平衡与土壤流失[J].地球与环境,2009,37(2):97-101. [12] 张小曳.亚洲粉尘的源区分布、释放、输送、沉降与黄土堆积[J].第四纪研究,2001,21(1):29-39. [13] 杜完成,何悦强,张兢希.大亚湾大气降尘中污染物入海量的研究[J].热带海洋,1994,13(4):92-96. [14] 王世杰,孙承兴,周德全.贵州高原岩溶台地红色风化壳的物源辨析[J].第四纪研究,2002,22(6):595. [15] 刘丛强.生物地球化学过程与地表物质循环[M].北京:科学出版社,2007:608. [16] SL190—96.土壤侵蚀分类分级标准[S].[ SL190-96. Standards for classification and gradation of soil erosion.] [17] 熊康宁,黎平,周忠发,等.喀斯特石漠化的遥感-GIS典型研究:以贵州省为例[M].北京:地质出版社,2002:33-182.[XIONG Kang-ning, LI Ping, ZHOU Zhong-fa, et al. Remote Sensing-GIS Based Study on Karst Rocky Desertification: The Case Study of Guizhou Province. Beijing: Geological Publishing House,2002:33-182.] [18] 白晓永,熊康宁,苏孝良,等.喀斯特石漠化景观及其土地的生态效应:以贵州贞丰县为例[J].中国岩溶,2005,24(4):276-281. [19] 胡宝清,蒋树芳,廖赤眉.基于3S技术的广西喀斯特石漠化驱动机制图谱分析:以广西壮族自治区为例[J].山地学报,2006,24(2):234-241. [20] 胡宝清,廖赤眉,严志强,等.基于RS和GIS的喀斯特石漠化驱动机制分析:以广西都安瑶族自治县为例[J].山地学报,2004,22(5):583-590. [21] 李阳兵,白晓永,周国富,等.中国典型石漠化地区土地利用与石漠化的关系[J].地理学报,2006,61(6):624-632. [22] 白晓永,王世杰,陈起伟,等.贵州土地石漠化类型时空演变过程及其评价[J].地理学报,2009,64(5):609-618.
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