异速生长模型估算不同林龄杉木人工林生物量  

Allometric Equations to Estimate Biomass of Different Age-sequence of Chinese fir(Cunninghamia lanceolata) Plantations

作　　者：苏瑞兰 

机构地区：[1]三元区林业局,福建三明365001

出　　处：《福建林业科技》2017年第2期105-108,共4页Journal of Fujian Forestry Science and Technology

摘　　要：在福建省三明市三元区城东乡荆东村,采用树干解析法对不同林龄(10、24、40 a)的杉木人工林生物量及其分配模式进行测定,并采用回归模型:W=a(D2H)b进行生物量拟合。结果表明:W=a(D2H)b可作为3个年龄序列的杉木人工林不同器官生物量的估算模型。杉木人工林不同器官生物量随林龄的增加呈递增趋势,幼龄阶段叶片和枝增长较快,中龄阶段树干增长较快,从中龄林向成熟林过度阶段生物量积累速率减慢。在不同生长阶段,杉木人工林不同器官对总生物量的相对贡献明显不同,其中树干所占比例最大(50.0%~73.4%),且随种植年限呈递增趋势,而根系所占比例随林龄的增加呈递减趋势,说明树干是杉木人工林生物量积累的重要组成部分。Destructive measurements of the patterns and biomasses of above-and below-ground components were performed on different age-sequence（10,24 and 40-year-old） of Chinese fir plantations in Jingdong Village,Chengdong town,Sanyuan District,Sanming City,Fujian Province.We used the regression model（W=a（D^2H）~b） to assessment the total biomass.Our results indicated that the model（W=a（D^2H）~b） is best fit for biomass estimation.The biomass of different components of Chinese fir increased with the ages of plantation;the leaves and branches grew faster in young stage,and the stem grew faster in mature stage;the accumulation rate of biomass became slowly from mature stage to over-mature stage.The contribution of different components to the total biomass was significantly different with each other during the processes of tree growth;the contribution of the stem was the biggest,which accounted for 50.0% to 73.4% of the total biomass;and the contribution increased with the ages while the contribution of the root to the total biomass decreased with the ages.These results demonstrate that the stem is an important part in the Chinese fir plantation of biomass accumulation,which could play a vital role for the management of plantation in the future.

关 键 词：杉木人工林 年龄序列 生物量 分配模型 

分 类 号：S791.27[农业科学—林木遗传育种] S758.62[农业科学—林学]