文献类型：期刊文献

中文题名：岩溶石山降香黄檀人工林的天然更新

英文题名：The natural regeneration of karst plantation of Dalbergia odorifera

作者：农友[1,2] 卢立华[1,2] 孙冬婧[1,2] 黄德卫[1,2] 李华[1,2] 雷丽群[1,2] 明安刚[1,2]

第一作者：农友

机构：[1]中国林业科学研究院热带林业实验中心;[2]广西友谊关森林生态系统国家定位观测研究站

年份：2017

卷号：37

期号：3

起止页码：63-68

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2014】；CSCD:【CSCD_E2017_2018】；

基金：广西自然科学基金青年基金项目(2014GXNSFBA118100);西南退化岩溶山地植被恢复与可持续土地管理(GEF);中国林科院中央级公益性科研院所基本科研业务专项资金项目(CAFYBB2014QA033)

语种：中文

中文关键词：岩溶石山;降香黄檀;人工林;天然更新;环境因子

外文关键词：Karst; Dalbergia odorifera; artificial forest; natural regeneration; environmental factors

分类号：S718.551.2

摘要：为深入了解降香黄檀Dalbergia odorifera人工林天然更新的特点及其与环境因子的关系,应用典型样地法,研究广西西南部岩溶石山降香黄檀人工林的天然更新,分析降香黄檀实生幼苗幼树的结构特征、空间分布格局,以及影响其种群更新的环境因子。结果表明:在20个5 m×5 m的样方中共调查降香黄檀幼苗幼树94株,其平均密度1 880株/hm^2,空间分布以随机分布为主。幼苗幼树的个体主要集中在DBH≤3 cm和H≤4.0 m以内,且胸径随树高的增加而增长;其多度随径级的增加而减少,随高度级的增加先增加后减少,均呈现偏锋型曲线。用Canoco对可能影响降香黄檀幼苗幼树更新的9个环境因子进行主成分分析(PCA)表明,选取的环境因子共解释幼苗幼树分布信息的81.91%,影响降香黄檀幼苗幼树密度的主要因子依次为草本个体数、草本覆盖度、林窗面积、土壤含水率、土壤表层p H值、灌木覆盖度、岩石裸露率、土壤有机质含量、灌木个体数。其中,降香黄檀幼苗幼树密度与草本个体数及其覆盖度之间存在极显著正相关(P<0.01);土壤表层pH值、灌木覆盖度、岩石裸露率与降香黄檀幼苗幼树密度呈负相关。
The natural regeneration of karst artificial forest of Dalbergia odorifera of Southwest Guangxi was studied by using the method of typical plots. The structural characteristics, spatial distribution pattern and the environmental factors influencing the population regeneration of the seedlings and saplings were analyzed. The purpose of the study is to find out the characteristics of natural regeneration of Dalbergia odorifera artificial forest and its relationship with environmental factors. The results showed that： A total number of 94 seedlings and saplings were found in twenty plots, the density was 1 880 plants/hm： The abundance of the seedlings and saplings was decreased with diameter while increased first and then decreased with the height class. Seedling and sapling individuals were concentrated within the range of DBH ≤3 cm and H ≤ 4.0 m, and the larger diameter the higher tree height. The spatial distribution of seedlings and saplings was mostly randomly distributed. The principal component analysis of 9 environmental factors showed that, the environmental factors were explained the information of 81.91%. There was a significantly positive correlation between density and the number of individuals of herbs and its coverage （P 〈 0.01）; soil pH, shrub coverage, the rock exposed rate were negatively correlated with the density of seedlings and saplings.