摘要
通过对林龄15a、25a、35a疏伐后的红松果林,三种不同保留密度、三次重复的试验样地、连续5a的结实量等情况进行调查,采用方差分析的方法得出了不同年龄阶段、不同径阶的红松果林经营密度。
There are three ages of Pinus koraiensis fruit forest after thinning which is 15years old,25years old and 35 years old,three different reserve densities,three repeated samples and seed yielding quantity of these trees was inspected during the 5 years continually.Based on the investigated data,the management density of Pinus koraiensis fruit forest in different ages and diameter grades was obtained using variance analysis.
出处
《林业勘查设计》
2007年第2期49-51,共3页
Forest Investigation Design
关键词
红松果林
密度
结实量
Pinus koraiensis fruit forest
Density
Fruit-bearing quantities