准噶尔盆地南缘无灌溉造林区土壤水分变化规律

对准噶尔盆地南缘——奇台县沙区典型样地土壤水分变化规律进行调查,结果显示:准噶尔盆地南缘无灌溉造林区土壤水分呈规律性的季节变化和垂直变化,春季冰雪融水是土壤水分的重要补给阶段,对土壤垂直分布影响较大,其他季节降雨少且雨量小,土壤水分的影响深度主要集中于地表30 cm的范围。另外,不同部位不同坡向的含水量及变化程度也不同,背风坡明显好于迎风坡,因此,可根据植物种的生物学特性和生态适应性,因地制宜地进行无灌溉植被恢复,现有的调查研究工作也证明植被可自然恢复,但需要一定的时间。

Variation of Soil Moisture in Non-irrigated Afforestation Area in Southern Margin of Junggar Basin

Variation of soil moisture of typical sample on sandy area in Qitai county in southern margin of Junggar Basin were investigated.Result shows that： the soil moisture appears a regular seasonal vertical changes in southern margin of Junggar Basin;meltwater in spring is an important supply stage of soil moisture,which have greater impact on the vertical distribution of soil;it has less frequent little rainfall in other season;impact depth of soil moisture focus on range of 30 cm on the ground surface.In addition,water content degrees of changes for different parts aspect are different;the leeward slope is significantly optimal than the windward slope,therefore,according to the biological characteristics ecological adaptation of plant species,non-irrigated revegetation should be acted according to circumstances;existing research work also proved that vegetation can be recovered,but it will take some time.