[1]卢德浩,陈世清,谢惠燕,等. 不同密度杉木人工林林分生长和林分结构差异研究[J].西北林学院学报,2023,38(6):162-170.[doi:10.3969/j.issn.1001-7461.2023.06.22]
　LU De-hao,CHEN Shi-qing,XIE Hui-yan,et al. Differences in Stand Growth and Structure of Cunninghamia lanceolata Plantations With Different Densities[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2023,38(6):162-170.[doi:10.3969/j.issn.1001-7461.2023.06.22]
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 不同密度杉木人工林林分生长和林分结构差异研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第38卷
期数:
2023年第6期
页码:
162-170
栏目:
出版日期:
2023-11-30

文章信息/Info

Title:
 Differences in Stand Growth and Structure of Cunninghamia lanceolata Plantations With Different Densities
文章编号:
1001-7461(2023)06-0162-09
作者:
 卢德浩; 陈世清; 谢惠燕; 邓宁栊; 冯铭淳; 林娜*
 （华南农业大学 林学与风景园林学院，广东 广州 510642）
Author(s):
 LU De-hao; CHEN Shi-qing; XIE Hui-yan; DENG Ning-long; FENG Ming-chun; LIN Na*
 (South China Agricultural University,Guangzhou 510642,Guangdong,China)
关键词:
 ; 杉木人工林; 林分密度; 林分结构; 林分生长
Keywords:
 ; Chinese fir plantation;  stand density;  stand structure;  stand growth
分类号:
S791.27
DOI:
10.3969/j.issn.1001-7461.2023.06.22
文献标志码:
A
摘要:
 探究不同密度杉木人工林林分结构与生长的差异，为杉木人工林的可持续经营提供科学依据。以清远市11年生3个不同密度（2 100、3 100、4 100株·hm-2）杉木人工纯林为研究对象，每个密度设置6个固定标准样地（20 m×20 m），选取大小比数、角尺度、直径结构、树高结构以及树冠结构5个参数探究林分结构特征，选取林分平均胸径、平均树高、蓄积和林木单株材积等指标探究林分生长特征，通过方差分析探讨林分密度对杉木人工林林分结构和生长的影响。结果表明，1）林分生长指数受林分密度影响差异显著（P＜0.05），4 100株·hm-2杉木人工林的平均胸径、树高、单株材积显著低于其他2种密度林分，3 100株·hm-2杉木人工林的蓄积显著高于其他2个密度林分。2）林分直径结构和树高结构在较高的林分密度下，小径级的林木较多，其分布曲线呈现为截尾正态分布。3）3 100株·hm-2的平均冠幅显著大于其他2种林分，4 100株·hm-2的平均树冠表面积以及树冠体积显著小于其他2种林分，3种不同密度之间的林分树冠投影比和冠长均呈现显著差异性（P＜0.05），不同密度杉木林的活冠比没有显著性差异（P＞0.05）。4）林分密度对林分角尺度的影响显著（P＜0.05），对林分大小比数的影响不显著（P＞0.05）。综合林木生长和林分结构等2个方面，林分密度为3 100株·hm-2的杉木人工林总体生长表现最好，具有培育速生、优质大径材的潜力，有利于形成稳定、可持续的人工林。
Abstract:
 The objectives of this study were to explore the differences in stand structure and growth of Chinese fir (Cunninghamia lanceolata) plantations with different densities,so as to provide scientific basis for sustainable management of Chinese fir plantation.Three 11-year-old pure Chinese fir plantations with different densities (2 100,3 100,4 100 plants·hm-2) in Qingyuan City were selected as the research objects,and six fixed standard plots (20 m×20 m) were set for each density.Five parameters,including neighborhood comparison,angle index,diameter structure,tree height structure and crown structure were selected to investigate the characteristics of stand structure.The average DBH,average tree height,stock and volume per tree were selected to explore the growth characteristics of the stand,and the influences of stand density on the structure and growth were analyzed by ANOVA.The results showed that 1) the growth index of each stand was significantly affected by stand density (P<0.05).The average DBH,tree height and volume of the stands with density 4 100 plants·hm-2 were significantly lower than those of the stands with density 2 100 and 3 100 plants·hm-2.The stock of the stands with density 3 100 plants·hm-2 was significantly higher than those of the other two density stands.2) For the stand diameter structure and tree height structure,more small diameter trees were found in the stands with higher stand density,and the distribution curve showed a truncated normal distribution.3) The average crown breadth of the stands with the density 3 100 plants·hm-2 was significantly larger than those of the other two density stands,and the average crown surface area and crown volume of the stands with density 4 100 plants·hm-2 were significantly smaller than those of the other two density stands.The canopy projection ratio and crown length of the three densities were significantly different (P<0.05),but there was no significant difference in the live crown ratio between different densities (P>0.05).4) Stand density had a significant effect on stand angle index (P<0.05),but had no significant effect on stand neighborhood comparison (P>0.05).Considering the two aspects of tree growth and stand structure,the Chinese fir plantation with a stand density of 3 100 plants·hm-2 demonstrates the best overall growth performance,and has the potential to cultivate fast-growing and high-quality large-diameter trees,which is conducive to the formation of stable and sustainable plantations.

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备注/Memo

备注/Memo:
 收稿日期：2022-05-29修回日期：2022-10-31
基金项目：广东省基础与应用基础研究基金自然科学基金项目（2021A1515011092）。
第一作者：卢德浩。研究方向：森林可持续经营。E-mail:875363261@qq.com
*通信作者：林娜，博士，硕士生导师。研究方向：森林经理。E-mail:nalin@scau.edu.cn
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