热带珍稀树种陆均松幼苗的更新现状及其影响因素  

Regeneration Status and Influencing Factors for Dacrydium pectinatum Seedlings of Tropical Rare Tree Species

作　　者：张涛 许涵[1] 李艳朋[1] 林明献[1] 陈巧[2] 杨繁 王灵 何声强 ZHANG Tao;XU Han;LI Yanpeng;LIN Mingxian;CHEN Qiao;YANG Fan;WANG Ling;HE Shengqiang(Research Institute of Tropical Forestry,Chinese Academy of Forestry/Jianfengling National Key Field Research Station for Tropical Forest Ecosystem,Hainan Island,Guangzhou,Guangdong 510520,China;Institute of Forestry Resource Information Techniques,Chinese Academy of Forestry,Beijing 100091;Jianfengling Department of Hainan Tropical Rainforest National Park Administration,Ledong,Hainan 572542,China)

机构地区：[1]中国林业科学研究院热带林业研究所/海南尖峰岭森林生态系统国家野外科学观测研究站,广东广州510520 [2]中国林业科学研究院资源信息研究所,北京100091 [3]海南热带雨林国家公园管理局尖峰岭分局,海南乐东572542

出　　处：《林业与环境科学》2023年第1期12-21,共10页Forestry and Environmental Science

基　　金：国家科技基础资源调查专项课题(2019FY101607);中央级公益性科研院所基本科研业务费专项资金(CAFBB2017ZB004-02);2019年中央财政林业改革发展资金尖峰岭珍稀濒危野生动植物保护项目(YCJSHN2020-011(A包))。

摘　　要：为了摸清陆均松Dacrydium pectinatum幼苗的更新现状及其影响因素,文章通过对海南吊罗山、霸王岭和尖峰岭地区的陆均松天然群落及其幼苗的更新状况进行调查,运用方差分析和回归分析,探究了影响陆均松幼苗数量的生物和非生物因子。结果表明:(1)吊罗山和霸王岭地区的陆均松存在一定程度的更新限制,而尖峰岭地区的陆均松更新能力极低。(2)陆均松的胸径大小对其幼苗更新具有最好的解释能力,主要表现为中等胸径的母树周围具有更高的幼苗数量;而在包括陆均松生物学特性和陆均松母树所处的环境条件等所有影响因子中,坡度对幼苗更新数量有最好的解释能力,主要表现为幼苗数量随着坡度的增加而减少。To study the seedlings regeneration status of Dacrydium pectinatum and its influencing factors,the seedlings regeneration status of D.pectinatum was studied by investigating the natural communities of D.pectinatum in Diaoluoshan,Bawangling and Jianfengling,Hainan,China.The biotic and abiotic factors that affect the number of D.pectinatum seedlings were summarized by using variance analysis and regression analysis.The results showed that there was a certain degree of regeneration limitation for D.pectinatum in Diaoluoshan and Bawangling,but the regeneration ability of D.pectinatum in Jianfengling was extremely low.Among the characteristics of D.pectinatum,the diameter was the best predictor of the number of seedlings,which was mainly manifested in the higher number of seedlings around the mother tree with medium diameter;Among all the factors(including the biological characteristics and the environmental factors of D.pectinatum),the slope was the best predictor to the number of seedlings,which was mainly shown as the number of seedlings decreases with the increase of slope.By studying the seedlings regeneration status of D.pectinatum and its influencing factors,we hope this paper would provide new insights for the conservation and management of this species.

关 键 词：陆均松 幼苗 更新 环境因子 

分 类 号：S791.47[农业科学—林木遗传育种]