福建柏人工林生长规律的研究

Study on the Growth Laws of Fokienia hodginsii Plantation

福建柏人工林树高、胸径生长随坡面升高而呈下降趋势，但至坡面近顶部，差异才达显著；树高连年生长量最大值出现在８年生，平均生长量最大值出现在１０～１２年生之间；直径连年生长量最大值出现在６年生；材积连年生长量在２０年生达到最大值，到３２年生为止材积平均生长量未达到最大；运用聚类分析方法，将福建柏生长发育分为４个阶段，第一阶段１～４年生为幼林期，第二阶段４～１４年生为速生期，第三阶段１４～２４年生为杆材阶段，第四阶段２４～３２年生为近成熟期。

The results show that the tree height and dbh growth of Fokienia hodginsii plantation assume the reductive tendency with the ascension of slopes,but this difference is not significant until near the slope top;the greatest current annual height growth appears at the age of 8;the greatest mean growth appears at the age of 10～12;the greatest current annual diameter growth appears at the age of 6;and the greatest current annual volume growth appears at the age of 20.By using the cluster analysis method,the growth and development of F.hodginsii are divided into 4 stages,i.e.the first stage is the young forest one at the age of 1～4,the second stage is the fast growing one at the age of 4～14,the third stage is the pole one at the age of 14～24 and the fourth stage is the nearly mature one at the age of 24～32.