福建柏人工林生物量的研究

福建柏 (ＦｏｋｉｅｎｉａｈｏｄｇｉｎｓｉｉＨｅｎｒｙｅｔＴｈｏｍａｓ)为我国二类重点保护树种 ,其树形优美 ,主干通直 ,适应性强 ,木材性质优良 ,是我国南方值得推广的树种。由于人为破坏 ,福建柏天然纯林被毁殆尽 (张炳荣 ,1 982 )。自 50、60年代 ,福建省开始营造福建柏人工林 ,不少已进入中成龄阶段 ,成为重要的森林资源。但对其进行的研究还很少。 1 997年我们对安溪半林国有林场福建柏人工林的生物量及其结构进行了研究 ,以期对福建柏人工林的研究提供基础资料 ,也为了解福建柏人工林的生产力 ,以对其进行合理经营提供科学依据。1…

A STUDY ON BIOMASS OF FOKIENIA HODGINSII PLANTATION

Forkienia hodginsii is one of the most important tree species in south of China. However, the natrual forest of Forkienia hodginsii nearly does not exist now in China because of disorderly cut and bad management. For this reason, a large area of plantation of Forkienia hodginsii was planted in Fujian Province since 1950's, but the study on it was very little. In 1997, we studied the biomass of Forkienia hodginsii plantation in order to provide scientific basis for the other studies and management about it. We set the plots on the continuous slope and used the usual methods to study the biomass of Forkienia hodginsii plantation. The results showed: (1) We could estimate the biomass of F. hodginsii plantation with both models W=aD b and W=a(D 2H) b; (2) The biomass distribution on the continuous slope decreased gradually from bottom to top of the slope and the biomass had the smallest value on the top of the slope; (3) The biomass of trunk and bark went obviously down from base to top of tree, and did the ratio of branch to leaf so; (4) The proportion of photosynthetic yield that used to make up the trunk increased with the growth of stands, however, the proportion that used for other organs of tree decreased; (5) The ratio of root to whole tree almost always was same,about 20%; (6) In accordance with the diameter grade distribution of biomass, the diameter grade of biomass maximum was always larger one diameter class than that of number maximum.