不同类型植物篱对长江上游坡耕地土壤养分含量及坡面分布的影响  

Effects of hedgerow intercropping with different species on soil nutrients and its distribution on steep land in upper reaches of Yangtze River.

作　　者：黎建强[1] 张洪江[1] 程金花[1] 王幸[1] 吕文星[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083

出　　处：《生态环境学报》2010年第11期2574-2580,共7页Ecology and Environmental Sciences

基　　金：国家科技支撑计划重点项目(2008BAD98B01-03)

摘　　要：在调查分析长江上游现有坡耕地植物篱的配置方式、生长状况和室内分析植物篱-坡耕地系统中土壤养分含量和颗粒组成的基础上,对3种坡耕地-植物篱系统中土壤养分含量及其分布特征进行了研究,结果表明:在坡耕地-植物篱系统中,植物篱能显著改善和提高植物篱带内表层土壤的养分含量,不同植物篱带内土壤有机质、全氮、水解氮、全磷、速效磷、全钾、速效钾平均质量分数比带间坡耕地土壤分别提高了59.1%、83.5%、56.2%、83.3%、149.6%、14.0%、153.1%,植物篱带内土壤阳离子交换量比带间坡耕地土壤提高了21.6%。植物篱带内比带间坡耕地土壤沙粒质量分数减小了9.4%,粘粒质量分数增加了21.6%,在植物篱系统中土壤粘粒质量分数与土壤养分含量在3种植物篱系统内表现出一致的规律性,自篱间坡耕地至植物篱带呈增加的趋势,至植物篱带下土壤粘粒和土壤养分含量减小。To achieve well understanding of the effects on soil nutrients concentration and its distribution on steep land by hedgerow intercroppings,the paper on the basis of investigation of the current hedgerow configuration and growth status in the upper reaches area of Yangtze River,soil nutrients and particle fraction of soil sampled from hedgerow systems were tested.The result showed that,（1） soil nutrients under the hedgerows were significantly improved and augmented by hedgerows.The mean value of soil organic matter,total and exchangeable nitrogen,total and exchangeable phosphorus,total and exchangeable potassium of soil under hedgerows of different species were increased by 59.1%,83.5%,56.2%,83.3%,149.6%,14.0% and 153.1%,cation exchangeable capacity by 21.6%.With soil between hedgerows,sand content became higher（by 9.4%） than soil under hedgerows,while clay content became higher under the hedgerow（by 21.6）.（2） Soil clay content under and before hedgerows were higher than between and after hedgerows.Distribution of soil organic matter and soil nutrients showed the same regularity as the soil clay particles.

关 键 词：植物篱 土壤养分 土壤颗粒组成 平面分布 

分 类 号：S153.6[农业科学—土壤学] S157.2[农业科学—农业基础科学]