中文摘要：

在森林生态系统中，地被物由林下枯落物、苔藓层以及表层土壤的根系组成（Kosugieta1．，2001；程金花等，2003）。在动物、微生物以及环境温湿度的作用下，地被物不断分解，补充了土壤养分含量（刘洋等，2006）。地被物在地表形成一层结构疏松的毡层，不仅能够减小雨水对地面的冲击，阻滞和分散降水，还增加了地表粗糙度，能够阻滞地表径流，吸收和储存降水，促使水分缓慢人渗，在防止土壤侵蚀和保持水土方面发挥了重要作用（张洪江等，2003）。

英文摘要：

Water holding capacity, absorption rate and saturated water stock of a different forest＇ s floor were studied in Liu Pan Mountain. The results showed that at the beginning of dipping in water, the absorption rate was high, and then it leveled off with the time going on. Un-decomposed litter and half-decomposed litter were saturated with water in 2 and 4 h, respectively. Except Pinus tabulaeformis litter, water holding capacity of haff-decomposed layer was 3.5 to 8 times as the dried weight and the water holding capacity of half-decomposed layer was 1.8 to 7.6 as the dried weight. The water holding capacity of broad-leaved litter was greater more than that of needle litter, and the capacity of moss was greater than branch litter. The water absorption rate was regressed to the time with the equation of Y = a ＋ bt^-1. Litter saturated water reflects hydrologic function. Litter saturated water Larix principis-rupprechtii and Quercus Liaotungensis were larger than other species in the valley. Additionally, there was abundant grass stock in Lar/x principis-rupprechtii and Betula platyphylla forest, and the grass water stock was respectively 5.4 t·hm-2 , 3.9 t·hm-2 , which accounted for 9.3% and 12.0% of that of litter in the two forests.