文献类型：期刊文献

中文题名：林分改造模式对马占相思森林群落木本植物更新的影响

英文题名：Effects of transformation mode on woody plant regeneration in Acacia mangium plantations

作者：曾伟[1] 雷江丽[1] 史正军[1] 袁峰均[1] 裴男才[2] 孙冰[2]

第一作者：曾伟

机构：[1]深圳市中国科学院仙湖植物园,深圳518004;[2]中国林业科学研究院热带林业研究所,广州510520

年份：2023

卷号：42

期号：1

起止页码：164-171

中文期刊名：生态科学

外文期刊名：Ecological Science

收录：CSTPCD;;CSCD:【CSCD2023_2024】；

基金：广东省林业科技创新项目(2021—2023)珠三角城市群彩叶林相美学文化与功能评价;国家林草局林业科技创新平台运行补助项目(2020-KYXM-09)“广东深圳城市森林生态系统国家定位观测研究站运行补助”;广东省林业科技创新平台建设项目“林业生态监测网络平台建设”;深圳市仙湖植物园科研基金项目“深圳市低效林不同改造模式生态效益评估”;深圳市仙湖植物园科研基金项目“相思林碳汇模型构建及低效林改造技术探讨”。

语种：中文

中文关键词：改造模式;物种多样性;林分结构;马占相思;木本植物

外文关键词：transformation mode;species diversity;stand structure;Acacia mangium;woody plant

分类号：S754.5

摘要：随着全国森林质量精准提升工程的全面实施,急需开展林分改造模式效果评估。采用4种改造模式的马占相思纯林(12年林龄)经过16年森林群落演替后生态系统达到相对稳定,拟从林分密度、物种多样性、径级分布等方面对这4种林分改造模式效果进行分析和评价。结果表明:(1)4个模式改造的林分中,皆伐后天然更新模式Ⅰ林分(简称皆伐Ⅰ林分)的木本植物密度最高;其次是不存在显著差异的间伐后补种更新模式Ⅲ林分(简称间伐补种Ⅲ林分)和封山育林更新模式CK林分(简称封育CK林分);皆伐后补种更新模式Ⅱ林分(简称皆伐补种Ⅱ林分)最低,仅为皆伐Ⅰ林分的35%(P<0.01)。(2)间伐补种Ⅲ林分和皆伐补种Ⅱ林分的Margalef指数没有显著差异,且均高于没有显著差异的封育CK林分和皆伐Ⅰ林分。Shannon-Wiener指数以间伐补种Ⅲ林分最高,而封育CK林分、皆伐Ⅰ林分、皆伐补种Ⅱ林分三者之间没有显著差异。Simpson指数也以间伐补种Ⅲ林分最高,而封育CK林分、皆伐Ⅰ林分、皆伐补种Ⅱ林分三者之间没有显著差异。间伐补种Ⅲ林分和封育CK林分两者的Pielou均匀性指数没有显著差异,均高于没有显著差异的皆伐Ⅰ林分和皆伐补种Ⅱ林分(P<0.05)。(3)在Ⅰ、Ⅱ、Ⅲ、CK这4个改造模式林分中,胸径小于10cm的木本植物株数所占比重均在60%以上,它们的胸高断面积占林分总胸高断面的比重依次减少。综合分析改造林分中木本植物密度、物种多样性、林分径阶分布等特性,4种马占相思林改造模式中以间伐补种模式Ⅲ较为合理。
With the comprehensive implementation of the national forest quality precision improvement project, it was urgent to evaluate the effect of the forest stand reconstruction mode. The 12-year-old Acacia mangium pure forests transformed by 4models had become relatively stable ecosystems after 16 years’ forest successions, and the effects of the 4 forest transformation models were evaluated in terms of forest density, species diversity, and size distribution. The results are as follows.(1) Among the 4 transformed forests, the natural regeneration pattern Ⅰ stands after clear cutting(referred to as stands Ⅰ) had the highest density of woody plants;followed by the replanting model Ⅲ standsafter thinning(referred to as stands Ⅲ) and the closed forest’s natural regeneration model CK stands(referred to as stands CK) which there was no significant difference between;the clear cutting and replanting mode Ⅱ stands(referred to as stands Ⅱ) was the lowest, only 35% of the stands Ⅰ(P <0.01).(2) There was no significant difference in Margalef index between stands Ⅲ and stands Ⅱ,which were both higher than that of stands CK and stands Ⅰ. The Shannon-Wiener index of the stands Ⅲ was highest, and there were no significant differences among the stands CK, stands Ⅰ, and stands Ⅱ. The Simpson index of the stands Ⅲ was also the highest, and there were no significant differences along the stands CK, stands Ⅰ, and stands Ⅱ. There was no significant difference in Pielou index between stands Ⅲ and stands CK, which were both higher than that of stands Ⅰ and stands Ⅱ(P <0.05).(3) Among the stands Ⅰ, stands Ⅱ, stands Ⅲ and stands CK, the proportions of woody plants whose diameters at breast height were less than 10 cm were over 60%, and the ration of their basal areas to the total forest basal areas decreased respectively. A comprehensive analysis was based on the woody plant density, species diversity, and distribution of forest diameter in the 4 transformed forests, the thinning and replanting model Ⅲ was more reasonable among the 4 transformation modes of Acacia mangium.