容重对不同有机质含量土壤水分入渗特性的影响  

Influence of Soil Bulk Density on Soil Water Infiltration Characteristics Under Different Soil Organic Matter Contents

作　　者：吴军虎[1] 张铁钢[1] 赵伟[1] 李家科[1] 杨亮 

机构地区：[1]西安理工大学教育部西北水资源与环境生态重点实验室,西安710048 [2]中国华电工程有限公司,北京100035

出　　处：《水土保持学报》2013年第3期63-67,268,共6页Journal of Soil and Water Conservation

基　　金：国家重点基础研究发展计划项目(2011CB411903);陕西省教育厅省级重点实验室科研计划项目(2010JS076);国家水体污染控制与治理科技重大专项(2009ZX07212-002-004-002);陕西省教育厅科研计划项目(11JK0736);陕西省重点学科建设专项

摘　　要：通过不同有机质含量的土壤入渗试验,分析有机质含量及容重对土壤水分入渗特性的影响。结果表明:容重对质地相同而有机质含量不同的土壤表现出不同的影响程度,对高有机质含量的土壤影响显著,有机质含量高的土壤在容重递增的过程中,土壤累积入渗量、湿润深度显著下降,稳定入渗率以乘幂形式迅速下降;有机质含量较低的土壤,容重增加对土壤入渗过程影响相对较小,容重增加时,其累积入渗量、入渗率、湿润深度也有不同程度的减小,但其减小的幅度范围较小,稳定入渗率呈平缓线性降低。采用Green-Ampt模型与Philip模型模拟不同容重及有机质含量的土壤饱和导水率结果与实测值吻合较好。Soil water infiltration characteristics under different soil organic matter contents were researched based on experimental data of infiltration under different soil bulk densities.The results indicated that soil bulk density had different influencing degree on the same soil texture with different soil organic matter content.The influence was obvious on soil with high soil organic matter content,soil accumulative infiltration volume and the wetting depth decreased significantly,stable infiltration rate reduced quickly like a power function with increasing soil bulk density.Soil with low soil organic matter content was affected lower,soil accumulative infiltration volume and the wetting depth slightly decreased with increasing soil bulk density,stable infiltration rate reduced slowly like a linear function.The calculating results of soil saturated hydraulic conductivity by using Green-Ampt model and Philip model agreed with experimental ones under different soil organic matter content and bulk density.

关 键 词：土壤有机质 容重 土壤水分入渗特性 

分 类 号：S152.5[农业科学—土壤学] S153.6[农业科学—农业基础科学]