国家储备林改培采伐强度对马尾松人工林生长的影响  

Effect of National Reserve Forest Conversion and Harvesting Intensity on the Growth of Pinus massoniana Plantation

作　　者：张洁 王元顶 舒德远 叶红环 何光辉 ZHANG Jie;WANG Yuanding;SHU Deyuan;YE Honghuan;HE Guanghui(Guizhou Academy of Forestry,Guiyang 550005,Guizhou,China;Forestry Bureau of Shiqian County,Tongren City,Guizhou Province,Shiqian 555100,Guizhou,China)

机构地区：[1]贵州省林业科学研究院,贵州贵阳550005 [2]贵州省铜仁市石阡县林业局,贵州石阡555100

出　　处：《贵州林业科技》2024年第4期28-34,共7页Guizhou Forestry Science and Technology

基　　金：贵州省林业局林业优秀青年人才培养专项资金项目,国家储备林改培采伐强度对林分蓄积及补植幼树生长量的影响研究(黔林科合J字〔2022〕08号)。

摘　　要：研究国家储备林改培采伐强度对马尾松人工林生长的影响,为培育马尾松大径级用材提供参考。以贵州省东北部石阡县国储林建设地块中马尾松人工林为研究对象,结合龄林(中龄林、近熟林)、郁闭度(中郁闭度、高郁闭度),实施轻度采伐(LT)(10%~20%)、中度采伐(MT)(21%~30%)和重度采伐(HT)(31%~40%)3种采伐强度,通过3 a的观测,利用方差分析和Duncan多重比较分析改培采伐强度对马尾松生长量的影响。结果表明:采伐强度显著影响马尾松的胸径和单株材积,尤其是林龄为中林龄,郁闭度为中郁闭度的林分最为敏感,其年均增长量随采伐强度的增大而增大,而采伐强度对于树高的生长促进作用有限。综合比较建议在选择国储林改培地块时,优先选择中龄林中郁闭度、中龄林高郁闭度和近熟林中郁闭度林分,并实施31%~40%的采伐强度。This study aims to investigate the impact of cutting intensity on the growth of Pinus massoniana plantations in the national reserve forest.The research object was then selected as the Pinus massoniana plantations in Shiqian County,northeastern Guizhou Province.The forest age(medium-aged forest and nearly mature or over-mature forest)and canopy density(medium and high canopy density)were also combined as well.Three cutting intensities were implemented:light cutting(LT)with 10%~20%removal,moderate cutting(MT)with 21%~30%removal,and heavy cutting(HT)with 31%~40%removal.Variance analysis and Duncan's multiple comparison analysis were carried to investigate the influence of cutting intensity on the growth of Pinus massoniana after three-year observations.The results indicate that the cutting intensity significantly dominated the diameter at the breast height and individual tree volume of Pinus massoniana.The most sensitive effects were found in the medium-aged forests with the medium canopy density.The annual growth rate of these forests increased with the intensity of cutting.While there was the limited promotion effect of cutting intensity on tree height growth.It was recommended to prioritize the medium-aged forests with the medium and high canopy densities,as well as nearly mature or over-mature forests with the medium canopy density,under the cutting intensity of 31%~40%after comparison.The finding can provide a strong reference to cultivate the Pinus massoniana with the large-diameter timber in the national reserve forest.

关 键 词：国储林改培 采伐强度 马尾松 生长量 

分 类 号：S753[农业科学—森林经理学]