长苞铁杉天然林水源涵养功能研究

研究了闽西邱家山长苞铁杉天然林、常绿阔叶林和杉木人工林的林冠层、林下植被层和凋落物层的持水量、土壤蓄水能力和渗透性能，结果表明：长苞铁杉天然林地上部分持水量与常绿阔叶林接近，分别为２５８．４２６Ｔ／ｈｍ２和２７７．２４２Ｔ／ｈｍ２，林地土壤的稳渗值亦相近，分别为６．６８ｍｍ／ｍｉｎ和６．９１ｍｍ／ｍｉｎ，是杉木人工林的１．８倍和１．９倍．说明了长苞铁杉天然林具有较好的水源涵养功能．

Study on Water Conservation Function of Natural Tsuga longibracteata Forest

This paper deal with the water holding capacity of canopy,vegetation layer under canopy and litter layer,the water holding capacity and permeability of soil layer in natural Tsuga longibracteata forest,evergreen broad leaved forest and Chinese fir plantation.The results showed that the total water holding capacity of natural Tsuga longibracteata forest and evergreen broad leaved forest were 258 426T/hm 2 and 277 242T/hm 2 in the aboveground part,and that the steady permeation value of their land were 6 68mm/min and 6 91 mm/min respectively,which were 1 8 times and 1 9 times of Chinese fir plantation respectively.It was obviously that natural Tsuga longibracteata forest has a good water conservation function.