Soil hydrological effects of Pinus tabulaeformis forest at different slope positions in the northern mountain of Hebei Province
The preliminary study on the hydrological effect in the soil layer of Pinus tabulaeformis forest at different slope positions in the northern mountain of Hebei Province was conducted.The results showed that:(1) in the soil layer of 0-40 cm,the variation range of soil bulk density was 0.97-1.19 g/em3,which increased with soil depth,and the soil total porosity was 45.43％-54.50％,which decreased with the soil depth;(2) the saturated water content per 10 cm of Plot Ⅱ and Plot Ⅰ at the upper slope was the maximum,with 713.67t/hm2 and 708.56 t/hm2,respectively,while that of Plot Ⅲ at the mid slop was the smallest,only with 583.00 t/hm2.The soil effective moisture per 10 cm of Plot Ⅲ at the mid slope and of Plot Ⅳ at the lower slope was the maximum,with 196.33 t/hm2 and 185 t/hm2,respectively;while that of the Plot Ⅱ at the upper slope was the minimum,only with 74.67 t/hm2;(3) the soil initial infiltration rate under the forest was 76.09～20.81 mm/min,with the steady infiltration rate of 1.95 ～ 4.06 mm/min.There existed an obvious functional relationship between infiltration rate and infiltration time.
northern mountain of Hebei ProvincePinus tabulaeformis Carr.soil hydrologicalslope position
NETL
NSTL
万方数据
维普
