黑龙江省中西部地区典型土壤入渗特征及影响因素

Infiltration Characteristics of Typical Soil in Midwestern Regions of Heilongjiang Province & Influencing Factors

选择黑龙江省中西部典型土壤类型作为研究对象,通过对土壤水分入渗率的测定,各典型土壤类型入渗特征及影响因素进行分析,结果表明:该区域土壤水分入渗率总体表现由大到小依次为风沙土、黑钙土、黑土。土类类型决定了土壤入渗率的级别;森林植被能减少土壤容重,增大土壤孔隙度和贮水量,进而增加土壤入渗能力;坡位对稳渗率的影响表现为由坡上部到坡下部稳渗率逐渐提高;土壤含水率与初始入渗率和稳渗时间呈负相关。

Selecting typical soil types in midwestern H eilongjiang Province as the research object, through the determination of soil water infiltration rate, infiltration characteristics of typical soil types and influencing factors were analyzed, the result shows that., the order of the overall performance of the soil infiltration rate in this region from large to small is： wind sand, chernozem, and black soil. Soil types which are the decisive factor for soil infiltration determines the level of the soil infiltration rate. Forest vegetation can reduce soil bulk density, increase soil porosity and storage capacity, thus increasing soil infiltration capacity. Influence of the slope position on the steady infiltration rate appears that steady infiltration rate gradually increases from upper slope to the lower slope. Soil moisture content and initial infiltration rate and steady infiltration time is negatively correlated.