文献类型：期刊文献

中文题名：马尾松人工林强度采伐后套种阔叶树种的生长动态

英文题名：Growth dynamics of hardwood species inter-planted under intensively thinned Pinus massoniana plantations

作者：曾冀[1,2] 雷渊才[2] 唐继新[1] 贾宏炎[1] 蔡道雄[1]

第一作者：曾冀

机构：[1]中国林业科学研究院热带林业实验中心;[2]中国林业科学研究院资源信息研究所

年份：2018

卷号：38

期号：3

起止页码：64-69

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：国家自然科学基金项目(31300532);中国林业科学研究院热带林业实验中心主任基金项目(RL-2012-022)

语种：中文

中文关键词：马尾松;套种;阔叶树;生长动态

外文关键词：Pinus massoniana; interplantation; hardwood species; growth dynamics

分类号：S791.248

摘要：研究马尾松人工林强度采伐后套种的不同树种的生长动态规律,筛选适宜的套种树种,为马尾松人工林近自然经营提供技术支撑。2008年2月于15年生马尾松人工林采用4个强度进行采伐,即保留密度分别为225(Ⅰ)、300(Ⅱ)、375(Ⅲ)和450(Ⅳ)株/hm2,于林下均匀套种大叶栎、红椎、灰木莲、香梓楠、格木等5个乡土阔叶树种,2008年底调查套种阔叶树的胸径、树高和冠幅等生长指标,此后至2016年每2年测定1次,应用方差分析和Duncan多重比较分析这些生长指标对不同强度采伐的动态响应。结果表明:采伐强度显著影响林下套种阔叶树的生长,其中大叶栎和灰木莲的胸径、树高和冠幅以及红椎的胸径和冠幅的生长随保留密度增大而减小,而红椎、格木的树高生长受采伐强度影响不大;格木的胸径和冠幅以及香梓楠的树高和冠幅生长在套种第7年之前受采伐强度影响不大,此后其生长随保留密度增大而减小;香梓楠的胸径生长则一直随保留密度增大而增大。大叶栎的胸径、树高和冠幅以及灰木莲的树高和冠幅、红椎的树高生长高峰出现在套种后第3年;红椎、灰木莲、香梓楠的胸径生长高峰出现在第5年;格木的胸径、树高和冠幅以及香梓楠的树高和冠幅、红椎的冠幅生长高峰出现在套种后第9年。马尾松人工林强度采伐后套种阔叶树的生长动态表现为大叶栎>红椎>灰木莲>香梓楠>格木。大叶栎、红椎、灰木莲的生长随采伐强度的增大而增大,而香梓楠、格木受采伐强度的影响不显著。综合比较5种套种树种的生长特性,在桂西南开展马尾松中龄林近自然化改造,选用大叶栎、红椎、灰木莲进行林下套种,宜采用采伐强度Ⅰ、Ⅱ,而套种香梓楠、格木则宜采用采伐强度Ⅲ、Ⅳ。
The growth dynamics of different tree species interplanted under Pinus massoniana with four thinning intensities were investigated in order to determine the suitable intercropping species in various types of stand structure,which will provide a technical support for the close-to-natural management ofPinus massoniana plantation.Fifteen-year-old Pinus massoniana plantation was thinned in February 2008 and the reserved densities were 225（I）,300（II）,375（III）and 450（IV）stems per hatter,respectively.Five indigenous broadleaf species were then interplanted meanly under the Pinus massoniana plantation and the diameter at breast height（DBH）or root collar diameter,tree height and crown width were investigated every two years for eight consecutive years since 2008.The analyses of variance and Duncan multiple＇ s comparison were conducted to examine the growth dynamic response of intercropped tree species to the thinning intensity.There was significant effect of thinning intensity on the growth of understory interplanting broad-leaved tree species.For example,the DBH,tree height and crown width of Quercus griffithii and Manglietia glauca,and the DBH and crown width of Castanopsis hystrix decreased significantly with the increase of reserved density,while the tree height of Castanopsis hystrix and Erythrophleumfordii were little influenced by the thinning intensity.The DBH and crown width of Erythrophleumfordii,and tree height and crown width ofMichelia hedyosperma were also declined with the increase of reserved density although the thinning intensity hadno significant influence on the growth initially.Contrarily,the DBH of Michelia hedyosperma increased with the increasing reserved density.Additionally,the DBH,tree height and crown width of Quercus griffithii,the tree height and crown width ofManglietia glauca,and tree height of Castanopsis hystrix reached the maximum at the third year after interplanting,while the DBH of Castanopsis hystrix,Manglietia glauca and Michelia hedyosperma reached the peak value at the fifth year after interplanting.The DBH,tree height and crown width of Erythrophleum fordii,the tree height and crown width of Michelia hedyosperma,and the crown width of Castanopsis hystrix peaked at ninth year after interplanting.Among the broad-leaf tree species interplanted under the Pinus massoniana plantation atter thinning,the best growth was Quercus griffithii,followed by Castanopsis hystrix,Manglietia glauca,Michelia hedyosperma and Erythrophleumfordii.The growth of Quercus griffithii,Castanopsis hystrix and Manglietia glauca increased as the thinning intensity increased,while the growth ofMichelia hedyosperma and Erythrophleumfordii were not significantly affected by the thinning intensity.The result suggested that Quercus griffithii,Castanopsis hystrix and Manglietia glauca were suitable intercropping species in the thinning intensity（I,II）and the Michelia hedyosperma and Erythrophleum fordii were suitable intercropping species in the thinning intensity（III,IV）of fifteen-year-old Pinus massoniana plantation in southwest Guangxi.