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Hydrological Effects of Litters in Different Forest Types

Pan Zizhong(the Forestry Bureau of Jidong County, Heilongjiang Province, Jidong 158200, P. R. China); Yang Wenhua(Maoershan Experimental Forest Farm of Northeast Forestry University); Qu Yinpeng(Hebei Forestry School)  
Based on field observation combined with analysis in experiment, the hydrological effects of litters in five kinds of forest types were studied in Maoershan Experimental Forest Farm. Results are as follows: the storage of litters in different forests ranges from 4.154 9 to 10.186 3 t/hm 2, which is in the order of Scots pine, Dahurian larch, Mongolian oak, Manchurian ash birch and. The dynamics of water content ratio of litters in different forests range from 311.49% to 682.60% which is in the order of Manchurian ash, Mongolian oak, birch, Dahurian larch and Scots pine. The storage of litters and the water content get increasing with the increase of the closure, but decreasing for the water content ratio in the same stand. The water capacity and its ratio of semi-decompound litter layer are the highest in broadleaved forests, but the water capacity is the highest in the full-decompound layer for the conifer plantation.
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