文献类型：期刊文献

中文题名：杉木人工林不同密度间伐林分生长优势的变化规律分析

英文题名：Variation of Growth Dominance in Thinned Chinese Fir Stands with Different Planting Densities

作者：王翰琛[1,2] 张雄清[1,2] 张建国[1] 屈彦成[1] 姜丽[1]

第一作者：王翰琛

机构：[1]中国林业科学研究院林业研究所,国家林业和草原局林木培育重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,江苏南京210037

年份：2021

卷号：34

期号：5

起止页码：32-38

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家自然科学基金(31971645)。

语种：中文

中文关键词：生长优势;间伐;初植密度;竞争;杉木

外文关键词：growth dominance;thinning;planting density;competition;Cunninghamia lanceolata

分类号：S753

摘要：[目的]利用杉木密度间伐林探究林分生长优势在间伐处理下的变化规律,为杉木林栽培管理提供有效的管理策略。[方法]以江西省分宜年珠林场青石湾杉木密度间伐林为研究对象,用线性混合效应模型分析了生长优势与林龄、累积间伐强度、保留株数密度以及这些变量相互作用的关系。[结果]在间伐前后,生长优势伴随着累积间伐强度、林龄以及保留株数密度的增加而增加。生长优势的负值未在最后的观测年出现。同一保留株数密度下,生长优势随累积间伐强度的增加而增加。[结论]低密度种植,低密度管理,使得生长优势更趋近于0,有利于林木均衡生长,提高大径材产量。高密度种植,低密度管理不仅在间伐收获小树的同时,伴随着累积间伐强度的增强,生长优势增加,促进林分内大树的生长,从而收获大径材。
[Objective]The thinned Chinese fir(Cunninghamia lanceolata)stands with different planting densities were used to explore the variation of growth dominance under different thinning treatments,so as to provide management strategies for cultivation and management of Chinese fir.[Method]The data for this study were sampled from Chinese fir plantation in Nianzhu Forest Farm,Fenxi city,Jiangxi Province.The linear mixed effect model was used to illustrate the growth dominance in relation to age,accumulated thinning intensity,living number of trees per hectare and the interaction of these variables.[Result]The growth dominance increased with accumulated thinning intensity,age,and living number of trees per hectare before or after the thinning.The negative value of growth dominance was not observed during the last observation.When the stands had the same living number of trees per hectare,the growth dominance increased with accumulated thinning intensity.[Conclusion]The sparse planting density and sparse density management make the growth dominance closer to the value 0,which is beneficial for balanced growth of all sized trees,and increasing the yield of larger trees.The dense planting density and sparse density management can not only harvest smaller trees,but also increase the growth dominance and promote the growth of larger trees with the increase of accumulated thinning intensity,as a result of harvesting the large size trees.