干旱地区冻结滞水的形成及其在造林中的应用

Formation of Frozen Stagnant Water and Its Application to Afforestation in the Arid Areas

为探索干旱地区冻结滞水形成及融化规律， 经室内冻融模拟试验结果表明， 在冻结势作用下包气带水和空气中水分以液态和气态向冻结滞水层迁移富集， 含水率比冻结前增加１１． １５％ ～１４． ７５％ ， 主要富集在０～２０ ｃｍ 的深度，形成倒置富水性在解冻期间由上向下融化，融水以蒸发为主消耗部分向下运动可见， 冻结滞水是干旱区林木等植物越冬春季繁衍不可缺少的水资源应用冻结滞水的理论和动态规律， 采用科学的技术措施， 提高其含水量和造林成活率及生长量，

The formation of frozen stagnant water and its thawing are studied in the arid areas Modelling experiment of freezing thawing shows that owing to frost water migrates into the freezing stagnant water layer from kremastic water and atmospheric water in terms of vapour and moisture It is found that water content increases 11 15%～14 75% after frost, mainly enriching at the depth of 0～0 2 m During the thawing period, the soil is thawing from the surface downwards, and the meltwater is mainly consumed with transpiration and partly percolates downwards The frozen stagnant water becomes an important water supply for plant growth and reproduction during winter and spring in the arid areas Applying the formation theory and the moving regulation of the frozen stagnant water, and taking scientific measures to increase this water content, afforestation survival rate and growth amount in order to restore vegetation and eco environment has obvious theoretical and social significance