北川河流域退耕还林(草)对土壤质量影响的评价  

Evaluation of Influence of Changing Slope Farmland into Forest and Grassland on Soil Quality in Beichuanhe Watershed

作　　者：李文忠[1] 贺永元 张伟华[1] 周心澄[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]青海省大通县林业局,青海大通810100

出　　处：《水土保持研究》2005年第6期1-3,共3页Research of Soil and Water Conservation

基　　金："十五"国家科技攻关计划项目"退耕还林还草工程区水土保持型植被建设技术研究与示范"(2001BA510B01)

摘　　要：'万物土中生',土壤是生态环境的重要组成部分.探讨退耕还林(草)工程对土壤质量的影响,可以为工程的持续开展提供有关的理论依据.通过对我国退耕还林(草)工程重点试验县--青海省大通县北川河流域不同时间序列的退耕地的土壤,进行了系统的对比研究.研究结果表明: 土壤质量综合指数值为坡耕地34.0%＜弃耕地40.8%＜退耕地(3～10 a)63.6%＜退耕地(11～20 a)74.4%＜天然次生林地82.8%＜天然灌丛地90.6%.随着时间的延续,退耕地土壤理化性质将会得到明显改善,土壤质量会逐步得到提高.“Anything grows in soil”and soil is an important part of the ecological environment. The study on the influence of the Project of Changing Slope Farmland into Forest and Grassland on soil quality could provide academic bases for the project development sustainably. Through the study on soil of the time sequence rehabilitation land in Beichuanhe watershed of Datong county,Qinghai province, one of the national experimental counties for the Project of Changing Slope Farmland into Forest and Grassland, the results showed that the soil quality index of different land types is sloping land 34. 0%〈 uncultivated land 40.8%〈rehabilitation land（3-10 a）63.6%〈rehabilitation land（11-20 a）74.4%〈natural forestland 82. 8%〈natural shrubland 90. 6%. With the time,physlcal and chemical properties of soil of rehabilitation land and soil quality of it would be obviously improved.

关 键 词：退耕还林 土壤质量 评价 

分 类 号：S152[农业科学—土壤学] S153[农业科学—农业基础科学]