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紫色土容许侵蚀量的定位试验确定
引用本文:刘刚才,李兰,周忠浩,杜树汉.紫色土容许侵蚀量的定位试验确定[J].水土保持通报,2008,28(6):90-94.
作者姓名:刘刚才  李兰  周忠浩  杜树汉
作者单位:[1]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [2]中国科学院北京地理科学与资源研究所,北京100101 [3]中国科学院研究生院,北京100049
基金项目:国家973项目(2007CB407206); 科技部支撑计划项目(2006BAC01A11); 国家自然科学基金项目(40201029)
摘    要:容许侵蚀量(T值)是土壤侵蚀程度分级和评价水土保持措施有效性的基础。应用以物质循环理论为基础的Barth模型,估算了不同母质类型,不同种植植被和不同土层厚度下的成土速率,并在田间定位试验点测定了这3种不同处理条件下的成土速率。研究结果表明,用Barth模型估算的成土速率,与田间测定值比较,总体上明显偏小;而且,它所确定的成土速率主要与径流量相关(R=0.6396,P=0.0504)。田间测定的成土速率,在不同的条件下差异明显,并都反映出了一定的变化规律;综合考虑田间不同试验条件下的成土速率并分析转换,确定四川丘陵区沙溪庙组和蓬莱镇组紫色土的T值为1200t/(km^2·a),遂宁组的T值为800t/(km^2·a)。

关 键 词:紫色土  容许侵蚀量  成土速率  定位试验
收稿时间:2008/6/23 0:00:00
修稿时间:2008/7/30 0:00:00

Determination of Soil Loss Tolerance for Purplish Soils
LIU Gang-cai,LI Lan,ZHOU Zhong-hao and DU Shu-han.Determination of Soil Loss Tolerance for Purplish Soils[J].Bulletin of Soil and Water Conservation,2008,28(6):90-94.
Authors:LIU Gang-cai  LI Lan  ZHOU Zhong-hao and DU Shu-han
Institution:Institute of Mountain Hazards and Environment,Chinese Academy of Sciences and Ministry of Water Resources,Chengdu,Sichuan 610041,China;Institute of Geographic Science and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences and Ministry of Water Resources,Chengdu,Sichuan 610041,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences and Ministry of Water Resources,Chengdu,Sichuan 610041,China
Abstract:Soil loss tolerance(T-value) is an important value to judge gradation of soil erosion and efficiency of its control countermeasures.In this study,soil formation rates(SR) of the purple soils(a Regosols) in the hilly area of Sichuan,China were determined by Barth equation(SR-estimated) and field measurements(SR-measured) with the three treatments of soil types(J1s,J3s,and J3p soils),vegetations(wheat-maize,loquat tree,and ryegrass),and soil depths(10,20,40,and 60 cm).SR-estimated values are generally smaller...
Keywords:purplish soil  soil loss tolerance(T-value)  soil formation rate  position fixed experiment  
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