粘粒含量对砂壤土水分常数的影响

土壤水分常数是评价土壤改良效果的主要指标。文章通过研究不同掺粘量对砂壤土水分常数的影响及机理分析。旨在为内蒙古旱作农业砂壤土改良、扩蓄、提高生产力提供有力的科技支撑和理论依据。研究表明：砂壤土掺粘后土壤的饱和导水率明显下降，当掺粘量为5％时，饱和导水率降低约为砂壤土的36％；田间持水量、毛管持水量、饱和含水量和萎蔫含水量随着粘粒含量的增加而增加；土壤有效含水率随着掺粘量的增加呈现出先增加后降低的趋势。

The Effects of Clay Content on Soil Moisture Constant

The soil moisture constant is a major indicator which evaluates the soil function. The effect and mechanization of adding clay in sandy loam was investigated in this paper, which provided technological support and theoretical basis on improving sandy loam. The results showed that, the saturated hydraulic conductivity decreased with the increasing clay mixing rate, which was the 36% of sandy loam＇s when adding clay was 5% of sandy loam weight; soil field capacity, capillary water capacity and saturated water capacity increased with the increasing clay mixing rate; Moisture content of soil effective with the increment of mixed sticky showed increasing trend decreases after then.