【摘要】 通过对原有刺槐林地、实行更新改造后形成的萌生幼林地和各种形式的刺槐、油松混交林地土壤水分的测定，结果表明：对刺槐林实施改造后，林地水分状况明显改善，土壤湿度平均提高１７．４２％；林地土壤干层未因改造措施而消失，但其出现的位置会发生一定的变化；土壤水分的季节动态分析表明，各林地在４０ｃｍ以下直到２００ｃｍ土层均属于次强度变化或弱度变化土层，从而说明２ｍ深层土壤水分仍然受林木根系吸水的影响；对刺槐实施改造后，林地在生长季节的蒸散耗水量有增大的趋势。更多还原

【Abstract】 Through measuring soil moisture of black locust (Robinia pseudoacacia L.) forest as control, regenerated young forest of black locust and various mixed forests of regenerated black locust and planted pine, following results were obtained: water condition of forestlands was bettered after improving, the soil moisture increased by 17.42% averagely; soil dry─layer in the forestlands did not vanished after improving, but its location moved definitely; according to seasonal analysis on the soil moisture, the soil layer of 40～200cm in the forestlands belonged to inferior great change or weak change layer respectively. This indicated that the soil water of 200cm deep was also affected by the tree roots; the evapotranspiration of forest lands during the growing season was increased after improving.更多还原