太岳山油松人工林土壤水分动态特征的研究

该文研究了太岳山油松人工林不同郁闭度林分以及荒地生长季节内的土壤水分动态。结果表明：整个生长季节内，荒地与林地贮水量差异并不显著，但森林郁闭度越大，贮水量越小．土壤含水量主要受降雨、蒸腾和蒸发的影响，干旱季节，林地蒸腾占主导地位，土壤剖面出现２０～４０ｃｍ的根系分布层偏下层土壤含水率最低，且郁闭度越大，该最低值越小；随着雨季的到来，各层土壤含水率的最大值依次出现，且郁闭度越大，该最大值越大，也出现的越迟；雨季过后，蒸发转变为主要因素，林地土壤含水率大于荒地。随着土层深度的增加，土壤含水量越稳定。

A Study on Soil Moisture Content Dynamics of Pinus tabulaeformis Plantation in Taiyue Forest Region

The soil moisture content dvnamics of Pinus tabulaeformis planted with differ-ent canopy density and abandoned land during growing season is discussed.It shows that thewater-storage capacity of abandoned land is more than those of forest lands,and the morecanopy density is,the less the water- storage capacity is,The soil moisture content is mainlyinfluenced by precipitation,transpiration and evaporation, In dry seasons , moisture contentof forest land is mainly influenced by transpiration distribute as“V”form from the upper tolower soil layers,the moisture content of layer 20～40cm is the least, and the more canopydensity is,the less this value is.With the coming of rainy season, the largest crests of mois- ture content of each soil layer emerge in turn, the crests in abandoned land appear ealier andthe values are less than forest lands, the more canopy density is,the later and more the crestis. After rainy season, transpiration turns to be a main factor, the soil moisture content offorest land is more than that of the abandoned land.With the increment of the depth of soillayer,the moisture content of forest land is more stable.