摘要
在东北林业大学帽儿山实验林场.对10年生的水曲柳落叶松带状混交林及纯林进行了调查．结果表明：水曲柳在混交林中表现出明显增产,高生长比纯林增加12.1％～25.5％．胸径生长增加12.7％～32.3％.落叶松在混交林中也表现出增产的趋势．高生长比纯林增加4.1％．胸径生长增加12.5％.种间关系属双方有利.运用简单竞争指数对树种的竟争程度进行比较表明：在混交林中仅用地上部测树因子构造的简单竞争指数并不能很好地体现树种间地上和地下部的综合竞争程度，这种指数主要体现了树种间地上部竞争程度。
The stand characteristics of 10-year- old ash and larch pure and strip mixture stands were investigated. The result shows that the growth of ash was improved obviously in the mixed stand. by 12.1%~ 25.5% for tree height and 12.7%~32.3% for diameter of breast height. The growth of larch showed less increase in the mixed stand. 4.1% for tree height and 12.5% for diameter of breast height. The interspecific relationship benefits both tree species. A simplified competition index was engaged to compare the competition level. The comparison result indicates that the simplified competition index constucted by using the above-ground stand characteristics could hardly tell the comprehensive (above-and below-ground)inter- specific competition level. The index shows mainly the above-ground competition.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1999年第2期6-9,共4页
Journal of Northeast Forestry University
基金
国家自然科学基金!39230280
关键词
水曲柳
落叶松
混交林
种间竞争
Manchurian ash (Fraxinus mandshurica)
Dahurian larch (Larix gmelini)
Mixed plantation. Interspecific competition
