鹫峰地区林木根系和石砾对土壤水分运移速率的影响  

Effects of plant roots and rock fragments on rate of water movement in Jiufeng area

作　　者：张英虎[1] 牛健植[1] 韩旖旎[1] 杜晓晴[1] 陈上杰[1] 

机构地区：[1]北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室,北京100083

出　　处：《干旱区资源与环境》2014年第5期121-126,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目"林木根系对溶质优先运移的影响机制研究"(41271044)资助

摘　　要：石质山地森林生态系统林木根系和石砾形成复杂的综合体系,为量化根系和石砾对土壤水分运移的影响,文中以鹫峰国家森林公园为研究对象,利用室内原状土柱穿透试验分析根石结构对水分运移速率的影响。结果表明：土壤深度0-40cm范围内,随着根系体积和干重的增加,水分运移速率增加,相关系数分别为0.91和0.88;石砾含量增加时,水分运移速率呈现降低趋势,显著性不强,相关系数为0.73,即：根石结构对土壤水分运移影响较复杂,水分运移速率与根系体积和干重呈正相关关系,与石砾含量呈负相关关系。Conspicuously,it is well established that soil water movement which influences on soil nutrition absorption,water quality and plants growth is a considerable yield with respect to soil science. With consideration of forest ecosystems,it is difficult to confirm relation of controlling factors to water movement due to comprehensive synthesis containing plant roots and rock fragments. In view of pivotal effects of plant roots and rock fragments on water movement,Jiufeng area located in Beijing was studied. Laboratory experiments with undisturbed soil columns were applied to confirm effects of such on rate of water movement. Results indicated that within a depth of 40cm there was a positive correlation between root volume,dry weight and rate of water movement with correlation efficient 0. 91 and 0. 88 respectively,while 0. 73 for rock fragments with a negative correlation.

关 键 词：土壤水分运移 根系体积 根系干重 石砾含量 水分运移速率 鹫峰地区 

分 类 号：S157[农业科学—土壤学]