初植密度对白桦食用菌原料林生长的影响

Effect of Planting Density on the Growth of Betula Platyphylla Edible Fungi Raw Material Forest

在黑龙江省铁力林业局退耕还林迹地进行白桦食用菌原料林试验,初植密度分别为2 500、3 300、4 400和5 500株/hm2,营造白桦与落叶松混交林作为对比试验林分,研究不同初植密度和造林方式对白桦生长的影响。结果表明:2 500株/hm2栽植密度林木生长最快,各生长性状表现较好;初植密度与树高、胸径的相关程度不明显;初植密度与树高、胸径的拟合方程均为3次方程,拟合程度一般;白桦与落叶松混交林较白桦纯林生长性状表现更好。

The raw material forest test for the culture of Betula platyphylla edible fungi was carried out in the conservation of cropland to forest in Tieli Forestry Bureau.The Betula platyphylla and larch mixed stand was used as a comparative test with four initial densities of 2500,3300,4400,and 5500 per ha,respectively,to analyze the effects of different planting density and afforestation methods on the growth of Betula platyphlla.The results showed that：the trees with 2500/ ha planting density grow fastest and all the growth traits performed better.The correlation relationship between planting density and tree height,DBH were not significant.The fitting equations between planting density and tree height,DBH were cubic equation,and the fitting degree was general.Betula platyphylla and larch mixed forest grow better than Betula platyphylla pure forest.