Quantitative analysis for interspecific relationship of larch stand mixed with ash

Abstract

Permanent sample plots were set up for researching interspecific relationship of the artificial larch stand mixed with natural ash in the slash site in Maoershan Experiment Forestry Farm of Northeast Forestry University. All trees in the plots were taken as objective trees and tree number, DBH, distance between trees and that of crown diameter were measured in range of 1–6m from every objective tree. Then study by Alemdag competition index, variance analysis and quantitation method were made. The result showed that the intraspecilic competition was more intensive than the interspecific competition. Especially the competition between larch and ash was least relatively For these kinds of site, the suitable mixture at 20–30 ages should be 2800 Ind./hm² in density and 2 larch: 1 ash in mixed ratio, which might improve site condition to promote stand productivity.