摘要
利用闽北 1 1～ 2 7年生杉木人工林的 36块临时样地和 2 5块固定样地材料 ,研究立地、年龄、保留密度、平均胸径、平均树高对杉木林分材种出材率变化规律的影响 .研究表明 :影响杉木中小径材成材的主要限制因子是立地 ,其次是保留密度和培育年限 .地位指数大于或等于1 6,保留密度为 1 0 0 0～ 1 40 0株 /hm2 ,年龄为 2 0～ 2 5 a时 。
The data from 36 temporary plots and 25 fixed plots of 17~25 years old Cunninghamia lanceolata plantation in the north of Fujian Province were used to study the influence of site,age,and reserved density mean DBH and mean tree beight on the change law of out put of wood sort for C.lancelata.The results showed that the dominant factor influencing the formation of middle and small dimension wood was site,followed by reserved density and cultivation duration.It is suitable to cultivate middle dimension wood when the site index is no less than 16,the reserved density is 1 000~1 400 trees per hectare,and the age of tree is between 20~25 years old.
出处
《福建林学院学报》
CSCD
北大核心
2002年第2期146-149,共4页
Journal of Fujian College of Forestry
基金
福建省自然科学基金资助项目 (B0 0 10 0 19)
关键词
人工林
林分材种
变化规律
杉木
中小径材
出材率
Cunninghamia lanceolata
the merchant volume of middle and small dimension timber
