摘要
为了解钩栗的生长规律,以湘西龙山县永龙界国有林场54a生钩栗天然林为研究对象,对其生长规律进行研究。结果表明:钩栗胸径、树高和材积均随年龄的增长而增加,54a生时分别达到24.50 cm(去皮)、17.40 m和0.526 6 m^3;钩栗胸径速生期为5~15a,其连年、平均生长量在43a生左右相交;钩栗树高速生期为5~10a,其连年、平均生长量分别在10~15a、20~25a和30~35a这三段时期内相交;钩栗材积速生期为15~45a,其连年、平均生长量并未在54a生以前相交,表明钩栗材积还未达到数量成熟。
In order to research the growth regularity of Castanopsis tibetana natural forest,the 54 a natural forest of C. tibetana has been selected in Yonglongjie State-owned Forest Farm,Longshan Country,Zhangjiajie City. The results showed that the DBH,height and volume increased with ages in C. tibetana,and the values reached to 24. 50 cm,17. 40 m and 0. 526 6 m^3 at 54 a,respectively. The rapid growth period of DBH displayed between 5 -15 a. The current annual increment curve and mean annual increment curve of DBH were met at 43 a. The rapid growth period of height displayed between 5 - 10 a. The current annual increment curve and mean annual increment curve of height were met in the three periods of 10 - 15 a,20 - 25 a and 30 - 35 a,respectively. The rapid growth period of volume displayed between 15 - 45 a,which indicates that the natural stand of C. tibetana hasn＇t reached its mature age before 54 a.
作者
侯海龙
龚玉子
吴琼玲
郭雄华
向祖恒
李志辉
HOU Hailong;GONG Yuzi;WU Qiongling;GUO Xionghua;XIANG Zuheng;LI Zhihui(Junshan State-owned Forest Farm of Zhuzhou County,Zhuzhou 412107,China;Hunan Academy of Forestry,Changsha 410004,China;The Bureau of Land Resources of Zhuzhou County,Zhuzhou 412100,China;Forestry Bureau of Zhuzhou County,Zhuzhou 412100,China;Forestry Bureau of Longshan County,Longshan 416800,China;Central South University of Forestry and Technology,Changsha 410004,China)
出处
《湖南林业科技》
2018年第3期39-43,共5页
Hunan Forestry Science & Technology
基金
湖南省科技计划项目:速生珍贵用材新品种选育及精准培育技术研究(2017NK2221)
关键词
钩栗
天然林
生长规律
Castanopsis tibetana
natural forest
growth regularity
