慈利县水土保持林下凋落物的蓄水功能

Water reserve function of litter in soil and water conservation forests of Cili County

采用野外实地观测与室内分析相结合方法,对慈利县6种林分类型的凋落物的水文效应进行了研究,结果表明：凋落物的存储量动态变化幅度为3.468-5.736 t·hm^-2,其排列顺序为油桐纯林〉毛竹杉木混交林〉杜仲纯林〉润楠次生林〉杉木纯林〉马尾松纯林;持水能力的变化幅度为47.36%-90.23%,排列顺序为润楠次生林〉杜仲纯林〉油桐纯林〉毛竹杉木混交林〉杉木纯林〉马尾松纯林。总体来说,阔叶树种的持水能力比针叶树种大。

By the field investigation and experimental measurement,Water reserve function of litter in 6 kinds of forest types of Cili county were studied,the results show that the litter storage changed from 3.468t·hm^-2 to 5.736t·hm^-2,and ranked as the following： pure forest of Vernicia fordii〉mixed forest of Phyllostachys pubescens and Cunninghamia lanceolata〉pure forest of Eucommia ulmoides secondary forest of Machilus pingii 〉pure forest of Cunninghamia lanceolata〉pure forest of Pinus massoniana,and the water-holding capability ranged from 47.36% to 90.23%,with a rank of secondary forest of Machilus pingii pure forest of Eucommia ulmoides pure forest of Vernicia fordii mixed forest of Phyllostachys pubescens and Cunninghamia lanceolata〉pure forest of Cunninghamia lanceolata pure forest of Pinus massoniana.In general,the water-holding capability of broadleaf tree species were better than that of conifer.