A preliminary study of the hydrological effects of litters layer and soil layer was carried out in five kinds of planted forest stands in Baoku forest farm

Qinghai Province.Results showed that(1)the total litter storage capacity was about 34.69-67.84 t/hm2which was in the order of Larxi principis-rupprechtii Mayr>Picea asperata Mast mixed Larix principis-rupprechtii Mayr>Picea asperata>Betula platyphylla Suk>Picea asperata Mast mixed Betula platyphylla Suk.The maximum water holding capacity ranged from 80.30 to 150.73 t/hm2

which was in the order of Picea asperata Mast mixed Larix principis-rupprechtii Mayr> Larix principisrupprechtii Mayr>Betula platyphylla Suk>Picea asperata Mast mixed Betula platyphylla Suk>Picea asperata Mast.The modified intercept amount of Picea asperataMast mixed Larix principis-rupprechtii Mayr was the strongest;being 94.32 t/hm2;and Picea asperata Mast was the worst，being 45.40 t/hm2.(2)Semi-decomposition litter reached saturation in 6 h;and without-decomposition litter.in 8 h.In first half-hour

absorption rate was the largest

and the rate was obviously slowed down after 6 h.(3)The soil water-holding capacity of Picea asperata Mast mixed Larix principis-rupprechtii Mayr was the strongest

while Picea asperata Mast mixed Betula platyphylla Suk was the worst.