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湾塌地乔灌幼林生长季土壤水分变化规律，一般丰水年水分活跃层和次活跃层的含水量高低随降雨多少而变化，６～７月为最低值，９～１０月达最大值，土壤水分恢复补偿。旱年亏缺。幼林郁闭前密度对土壤水分影响不明显，而５年生刺槐林和４年生沙棘林土壤水分发生分异。乔灌郁闭成林生长季始末土壤水分变化规律同幼林。且４月份土壤水分受前一年降雨的影响，而汛期降雨则影响生长季末土壤水分的恢复或亏缺。一般全剖面可恢复补偿８０％左右，旱年严重亏缺。沙棘林的相对稳定层水分偏高３％～７％．
The variation law of soil moisture during the growing season of Qiaogou afforestation in the collapsed bay, the water content of the active and active layers of water in normal wet years varied with the rainfall, the lowest in June-July and the highest in September-October, Soil moisture recovery compensation. Dry years deficit. The density of young canopy had no significant effect on soil moisture, while the difference of soil moisture occurred between the 5-year-old Robinia pseudoacacia forest and the 4-year-old Hippophae rhamnoides forest. The changing regularity of soil moisture during the period of closed growth of shrub and canopy in young plantation was the same as that in young plantation. In April, soil moisture was affected by rainfall in the previous year, while rainfall in flood season affected the recovery or deficit of soil moisture at the end of growing season. General profile can be restored about 80% compensation, a serious shortage of dry years. The relatively stable layer of seabuckthorn water moisture 3% to 7%.