荒漠化草原不同机械组成土壤水分运移规律研究

Study on Different Mechanical Composition of Soil Moisture Move Regularity in Desertification Grassland

利用定位观测方法研究了荒漠化草原不同机械组成土壤水分的运移规律。结果表明:受降雨影响,松砂土的保蓄水能力较弱,中壤土较强,年度内土壤贮水量的变化趋势基本相同;荒漠化草原土壤的水分活跃层主要集中在110cm以上土层,且在80cm以上土层最为剧烈;实施围栏封育后,草原植被得到了恢复,植被的生长消耗了大量的土壤水分,造成土壤水分的亏缺,降低了土壤水分储量。

The soil moisture move law was studied by positioning methods of observation in different mechanical composition of desertification grassland. The results showed that water storage capacity and the preservation of the loose sand was less, it was higher in loam soil, and the annual soil water storage trend was basically the same due to the influence of rainfall; desertification grassland soil moisture active level existed in the layer of above depth of 110 cm, while in the layer of above the depth of 80 cm was most intense; the grassland vegetation recovery through the implementation of the fencing consumed a large amount of soil moisture for vegetation growth, resulting in the deficit of soil moisture and reduction of soil moisture reserves.