岷江上游杂谷脑河流域不同土地利用类型土壤碳氮特征  

Characteristics of Soil Carbon and Nitrogen Content under Different Land Use at Zagunao River Basin

作　　者：刘正刚[1] 王勇军[1] 王宪帅[1] 

机构地区：[1]四川农业大学林业生态工程省级重点实验室,四川雅安625014

出　　处：《浙江林业科技》2011年第4期1-5,共5页Journal of Zhejiang Forestry Science and Technology

基　　金：国家"十一五"科技支撑项目"长江中上游西南山地退化生态系统综合整治技术与模式"(2008BADC2B01);四川省教育厅重点项目"马尾松低效林改造对土壤碳汇功能的影响"

摘　　要：对杂谷脑河流域不同区段(上、中、下游)6种不同土地利用类型土壤有机碳和全氮进行测定。结果表明:该流域土壤有机碳含量为经济林地>农耕地>人工成熟林地>灌木林地>人工幼龄林地>天然次生林地;土壤全氮含量为农耕地>经济林地>天然次生林地>人工成熟林地>灌木林地>人工幼龄林地;C/N为人工幼龄林地>人工成熟林地>经济林地>灌木林地>农耕地>天然次生林地。同一土地利用类型在不同区段中,经济林土壤有机碳和全氮含量表现为中游>下游;农耕地土壤有机碳含量为中游>上游>下游;土壤全氮含量为下游>中游>上游;灌木林地土壤有机碳和全氮含量为中游>下游。同一区段不同土地利用类型中,流域下游土壤有机碳表现为经济林地>农耕地>灌木林地,全氮含量表现为农耕地>经济林地>灌木林地;流域中游土壤有机碳和全氮含量均表现为含量农耕地>经济林地>灌木林地;流域上游土壤有机碳含量表现为人工成熟林地最高>农耕地>人工幼龄林地>天然次生林地,全氮含量表现为天然次生林地>人工成熟林地>农耕地>人工幼龄林地。Soil organic carbon and total nitrogen content under 6 different land use at different reaches（upper,middle and lower） of Zagunao River basin,Sichuan province were measured.The results showed that soil organic carbon,total nitrogen content and C/N of the river basin were in order as follows： economic forest farmland planted mature forest shrub planted young forest natural secondary forest,farmland economic forest natural secondary forest planted mature forest shrub planted young forest and planted young forest planted mature forest economic forest shrub farmland natural secondary forest,respectively.With same land use at different reaches,soil organic carbon and total nitrogen content of economic forest showed middle reaches lower reaches,soil organic carbon and total nitrogen content of farmland showed middle reaches upper reaches lower reaches and lower reaches middle reaches upper reaches respectively,and the two contents of shrub were middle reaches upper reaches.At same reaches under different land use,the soil organic carbon and total nitrogen content separately showed economic forest farmland shrub and farmland economic forest shrub at the lower reaches;at the middle reaches,they all showed farmland economic forest shrub;at the upper reaches,they separately showed planted mature forest farmland planted young forest natural secondary forest and natural secondary forest planted mature forest farmland planted young forest.

关 键 词：土地利用类型 有机碳 全氮 杂谷脑河 

分 类 号：S714.4[农业科学—林学]