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Position: Home > Articles > Mechanism of Formation of Soil Crevice and Soil Erosion in Intensively-eroded Area in Yuanmou Dry and Hot Valley of Jinshajiang River Journal of Soil and Water Conservation 2008,22 (1) 33-36+42

金沙江干热河谷元谋强侵蚀区土壤裂隙形成与侵蚀机制

作  者：
何毓蓉;沈南;王艳强;唐家良;高庭艳;杨艳鲜;范月清
单  位：
云南省农科院热区生态农业研究所;四川农业大学资源环境学院;中国科学院水利部成都山地灾害与环境研究所
关键词：
土壤裂隙;侵蚀作用;土壤特性;土壤微形态;元谋强侵蚀区
摘  要：
根据金沙江干热河谷元谋地区红土层非常发育的裂隙现象,对该地区典型区土壤裂隙形成的环境和土壤剖面进行了调查,并采样进行相关土壤理化性质测定、粘土矿物X-射线衍射分析以及土壤微形态研究。结果表明:(1)该区旱季丰富的土壤裂隙形成与该区主要分布的第四系古红土层(QS)和第四系元谋组的黄棕色土层(QY)等红土母质特性有密切关系;(2)由于土壤裂隙非常发育,成为了边坡崩塌和直接产生重力侵蚀的成因,加剧了土壤侵蚀过程,导致了土柱和土林等强侵蚀景观形成。研究表明,土壤裂隙是金沙江干热河谷元谋地区强烈侵蚀和水土流失所特有的成因。
译  名：
Mechanism of Formation of Soil Crevice and Soil Erosion in Intensively-eroded Area in Yuanmou Dry and Hot Valley of Jinshajiang River
作  者：
HE Yu-rong1,SHEN Nan2,WANG Yan-qiang1,TANG Jia-liang1, GAO Ting-yan1,YANG Yan-xian3,FAN Yue-qing3(1.Institute of Mountain Hazards & Environment,Chinese Academy of Sciences & Ministry of Water Conservancy,Chengdu 61004;2.College of Resources & Environment,Sichuan Agricultural University,Ya'an,Sichuan 625014;3.Institute of Tropic-subtropical Eco-agriculture,Yunnan Agriculture Academy,Yuanmou,Yunnan 651300)
关键词：
soil crevice;erosion action;soil characteristic;soil micromorphology;deep erosion area in Yuanmou
摘  要：
The Yuanmou dry and hot valley of the Jinshajiang river is one of the fragmental environment areas in China,where the soil and water loss was very serious.It is difficult to interpret the peculiar soil erosion phenomenon using the traditional opinion.This study based on the observation in the environment and soil profiles which related with developed soil crevice,and using such means as chemical analysis,X-ray diffraction pattern and micromorphology.Results showed that:(1) In this area,the developed soil crevice was significant correlated with the parent material of the quaternary system old red horizon(QS) and yellow brown horizon(QY).(2) The developed soil crevice was the main reason for soil fall and gravity erosion,as the result,the soil erosion increased obviously.Finally this paper advanced a new viewpoint that soil crevice was the most important reason of the seriously soil and water loss formation.

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