Study on Water Conservation of Near-Natural Forest and Pure Forest in Upper Reaches of the Huangpu River
This study focuses on water-holding capacity (WHC) of forest for conservation of water supply in upper reaches of the Huangpu River.Specifically,WHCs of canopy,litter layer and soil were compared with each other in the near-natural forest,the pure Cinnamomum camphora forest and the pure Sapindus mukorossi in the study region.The results showed that aboveground WHC of pure Cinnamomum camphora forest (16.36 t/hm2) was approximately equal to the aboveground WHC of near-natural forest (16.85 t/hm2),and was greater than the aboveground WHC of pure Sapindus mukorossi forest (12.54 t/hm2).Order of WHCs among different forest types was the near-natural forest (0.370 t/hm2),pure Sapindus mukorossi forest (0.004 t/hm2) and the pure Cinnamomum camphora forest (0.003 t/hm2) in terms of the litter layer,and the near-natural forest (2 657.02 t/hm2),the pure Sapindus mukorossi forest (2 526.81 t/hm2) and the pure Cinnamomum camphorar forest (2 474.80 t/hm2) with respect to the soil layer.The soil layer of the studied forest played the major role in the conservation of water supply,but it could not reach such a state without interactions with the aboveground and litter layers.The total water conservation is higher in the near-natural forest (2 673.73 t/hm2) than the pure Sapindus mukorossi forest (2 539.35 t/hm2),and is the lowest in the pure Cinnamomum camphora forest (2 491.65 t/hm2).These results consistently suggested that the near-natural forest with complex community structure and high species diversity had the highest WHC,followed by the pure Sapindus mukorossi forest and the pure Cinnamomum camphora forest.
near-natural forestwater conservationcanopy interceptionwater-holding capacity of littersoil physical properties
国家科技期刊平台
NSTL
万方数据
维普
