宝天曼自然保护区不同林龄锐齿栎林枯落物层水文特性

Hydrological features of litter layer of quercus aliena var.acuteserrata forest of different age in Baotianman Nature Reserve

对宝天曼自然保护区不同林龄锐齿栎林下枯落物层蓄积量、自然含水量和持水过程进行了研究.枯落物蓄积量幼龄林、中龄林、成熟林分别为14.61,15.60,13.99 t.hm-2;不同林龄枯落物中占比重最大的均是叶,其次是枝;各林龄林分枯落物最大持水量均是未分解层小于半分解层,未分解层最大持水率是200%～219%,半分解层最大持水率是216%～279%;3种林龄林分枯落物层最大持水量排序为中龄林>幼龄林>成熟林;3种林龄枯落物层有效拦蓄深分别为2.50,2.83,2.21 mm.

This paper has studied on the litter layer accumulation, natural moisture content and water- holding process of quercus aliena var. acuteserrata forest of different age in Baotianman Nature Reserve. The amount of litter accumulation in young forest, middle-aged forest, mature forest was 14. 61, 15.60,13.99 t . hm^-2 respectively; the largest proportion of litter layer of different forests was the leaves, followed by branches ; for all age of the forests, the water holding capacity of semi-decomposed layer was stronger than undecomposed layer, with the largest water holding ratio for the undecomposed layer ranging from 200 percent to 219 percent and 216 percent to 279 percent for the semi-decompoesd layer ; the order of the greatest water-holding capacity of litter layer from three kinds of forest was ： mid- dle-aged forest 〉 young forest 〉 mature forest; the effective storing depth of litter layer of three kinds of forest were 2.50,2.83,2.21 mm respectively.