In this paper

four different forest stands (larch pine forest

camphor pine forest

mixed forest of larch pine and camphor pine

and mixed forest of camphor pine and elm) of yudaokou pasture in weichang County

Chengde city were chosen as objects and their hydrologic effect of litter was studied by sample survey and indoor soaking method. The results showed that the amount of litter in various forest stands was 5.42~24.59 t/hm2

of which larch pine forest had the largest amount

24.59 t/hm2

and the amount of mixed forests of camphor pine and elm was the smallest

5.42 t/hm2. The contents of the semi-partition layer of the four stands of forest were all larger than the undecomposed layer. The average maximum water holding capacity was larch pine forest (16.61 t/hm2) > mixed forest of larch pine and camphor pine (14.80 t/hm2) > camphor pine forest (10.22 t/hm2) > mixed forest of camphor pine and elm (9.99 t/hm2). The average maximum water holding rate was larch pine forest (427.02%) > mixed forest of camphor pine and elm (396.30%) > mixed forest of larch pine and camphor pine (360.88%) > camphor pine forest (303.13%). The effective retaining content was mixed forest of larch pine and camphor pine (74.65 t/hm2) > larch pine forest (71.21 t/hm2) > camphor pine forest (48.82 t/hm2) > mixed forest of camphor pine and elm (17.66 t/hm2). The effective retaining rate was larch pine forest (344.99%) > mixed forest of camphor pine and elm (326.66%) > mixed forest of larch pine and camphor pine (286.27%) > camphor pine forest (215.49%). The comprehensive results showed that larch pine forest has the best water holding capacity in litter layer

and the function of retaining water in litter layer of larch shelter forest in this area is better than other types of forest stand.