27年生江南油杉人工林天然更新及其幼苗生长特征  

Natural Regeneration and Seedlings Growth Characteristics of 27-year-old Keteleeria cyclolepis Plantation

作　　者：张烨[1] 韦铄星[1] 蒋燚[1] 刘菲[1] 刘雄盛[1] 王勇[1] ZHANG Ye WEI Shuo-xing JIANG Yi LIU Fei LIU Xiong-sheng WANG Yong(Guangxi Forestry Research Institute, Key Laboratory of Central South Fast-growing Timber Cultivation of Forestry Ministry of China, Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Nanning 530002, Chin)

机构地区：[1]广西壮族自治区林业科学研究院国家林业局中南速生材繁育实验室广西优良用材林资源培育重点实验室,南宁530002

出　　处：《广西林业科学》2016年第3期334-337,共4页Guangxi Forestry Science

基　　金：国家林业公益性行业科研专项(201304108);广西林业科技项目(桂林科字[2014]第05号);广西十百千人才专项资金;广西林科院基本科研业务费专项(林科201418号);广西优良用材林资源培育重点实验室自主课题(14-A-03-02)

摘　　要：对27年生江南油杉（Keteleeria cyclolepis）人工林的生长状况和天然更新特征调查,结果表明：树高年均生长0.87 m,胸径年均生长0.96 cm;天然更新幼苗地径分布在0.5-3.0 mm之间,苗高在30 cm以内,并集中于东、南方位树冠垂直投影范围;幼苗生长密度峰值出现在距离树干1 m和4 m处。江南油杉人工林的幼苗生长期,应及时抚育除草,避免遮挡光照,从而提高造林成活率。Survey on the growth characteristics and natural regeneration of 27-year-old Keteleeria cyclolepis found that the tree height of yearly average growth was 0. 87 m, diameter at breast height of yearly average growth was 0. 96 cm; basal diameter of seedlings from natural regeneration ranged from 0. 5 mm to 3.0 mm with the height less than 30 cm, mainly distributed in eastern and southern side; the density peak of seedlings concentrated between 1 m and 4 m from tree trunk. It was concluded that during the seedling stage, it should weed in a timely manner and avoid shading in order to improve survival rate of afforestation.

关 键 词：江南油杉 天然更新 幼苗 

分 类 号：S791.15[农业科学—林木遗传育种]