红壤地区典型农田土壤饱和导水率及其影响因素研究  

Saturated Hydraulic Conductivity and Its Influential Factors of Typical Farmland in Red Soil Region

作　　者：方堃[1] 陈效民[1] 张佳宝[2] 王伯仁[3] 黄晶[3] 甘再福[1] 

机构地区：[1]南京农业大学资源与环境科学学院,南京210095 [2]中国科学院南京土壤研究所,南京210008 [3]中国农业科学院祁阳红壤实验站,湖南祁阳426182

出　　处：《灌溉排水学报》2008年第4期67-69,共3页Journal of Irrigation and Drainage

基　　金：国家重点基础研究发展计划(973计划)项目(2005CB121103);中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室开放课题(0751010015)

摘　　要：研究了湖南祁阳红壤地区旱地、水田的原状土和扰动土的饱和导水率，并分析了土壤的有机质含量、土壤质地、土壤容重等土壤基本性质对土壤饱和导水率的影响状况。结果表明：原状土的饱和导水率变化于44．8×10^-4～1．94×10^-4cm／s之间，扰动土的饱和导水率变化于2．59×10^-4～1．09×10^-4cm／s之间；同一水稻土剖面上的饱和导水率基本呈现由上向下逐渐减小的趋势，且原状土的饱和导水率普遍大于扰动土的饱和导水率。原状土和扰动土的饱和导水率与土壤的主要物理性质之间存在着一定的相关性。通过SPSS统计软件分析显示，土壤容重是影响饱和导水率的最主要因素，而其它如有机质含量和粘粒含量等因素也有着一定的影响。The undisturbed and disturbed soil saturated hydraulic conductivities of a typical red soil from dry land and paddy land respectively were studied. In addition, the influencing factors of the soil saturated hydraulic conductivities also had been studied, including soil bulk density, soil texture and the organic matter content. The results show that the range of the undisturbed soil saturated hydraulic conductivity was between 44.8 × 10^-4 and 1.94 × 10^-4 cm/s, and the disturbed soil saturated hydraulic conductivity was between 2.59×10^-4 and 1.09 × 10^-4 cm/s. The surface layer＇s saturated hydraulic conductivity was the largest one. According to the results of SPSS, it can be concluded that bulk density was the main influencing factor, soil texture and the organic matter content also influence the soil saturated hydraulic conductivity.

关 键 词：红壤地区 饱和导水率 影响因素 

分 类 号：S152.5[农业科学—土壤学]