中文摘要：

通过对湘西喀斯特地区27年生香樟人工林的调查分析,发现该地区香樟的胸径生长在第5年开始进入速生期,20 a后胸径生长开始下降,其连年生长量在11 a时达到最大值,其值为1.2 cm;树高生长在第5年时进入速生期,16 a后生长速度下降;香樟材积生长在10 a后进入速生期,材积的连年生长量在16 a时达到高峰,比胸径连年生长量最大值出现时间推迟5 a;林分生物量不受林分年龄的影响,均出现树干〉树根〉树枝〉树叶〉树皮这样一条规律,且树干生物量占总生物量的75%以上。这将为湘西喀斯特地区香樟造林与管理提供重要理论依据。

英文摘要：

Cinnamomum camphora is an important fast-growing hardwood and native tree species China subtropical area.Survey of the 27-year-old C.camphora plantation in the karst region of western Hunan indicates that the growth in DBH started fast-growing from the 5th year by planting with one-year-old seedlings,and the DBH growth began to decline after 20th year,and the current annual increment recorded at 11th year reached the maximum value,being 1.2 cm.Notable height growth commenced in the 5th year,and slowed down from the 16th year.The volume growth came in the 10th year,and the current annual increment of volume reached the maximum in the 16 th year,which is 5 years later than the current annual increment of DBH maximum arrived.The stand biomass was not affected by the stand age,which was uniformly trunk〉root〉branch〉leaf〉bark,and the stem biomass accounted for 75% of the total biomass.