三种阔叶次生林的茎流研究

A STUDY ON THE STEMFLOW OF THREE TYPES OF NATURAL SECONDARY FOREST

本文测定了白桦林、水曲柳林、蒙古栎林的树干茎流量及其养分元素含量,结果表明:三个林分的茎流差异十分明显(白桦:水曲柳:蒙古栎≈1:2:3),这种差异与树叶形态、枝条分枝角度及林分的叶面积指数有关。茎流中绝大多数元素的含量显著地高于降雨中的含量。蒙古栎林借助于它的形态结构使其根系区域获得的水分、养分最多,从而有助于它适应干旱、瘠薄的立地环境。

This paper deals with the relationship between stemflow and morphological characteristics of each dominant tree species of three types of natural secondary forest (Betula platyphylla,Franxinus mandshurica,and Quercus mongolica) and stemflow chemistry. The stemflow varies obviously with types of forest and depends on their leaf morphological characteristics, branch angle and leaf area index . Q . mongolica can get mbre water and nutrients through stefriflow that help it to adapt to dry. meager soil at the mounta'n ridge.