拉氏栲人工林生长量·生物量及生产力研究

利用树干解析计算分析福建省牛姆林自然保护区18 a生拉氏栲（Castanopsis lamonteii）人工林的生长量、生物量及生产力特征.结果表明：拉氏栲树高、胸径和材积总生长量分别达到16.4m,15.85 cm和0.17 m3,期间分别出现5次、3次和1次生长高峰,按生长高峰出现年份先后顺序依次为胸径、树高和材积;树高、胸径连年生长量曲线起伏波动较大,且与平均生长量曲线出现多次相交,材积各生长量曲线变化幅度相对较小;将拉氏栲树高、胸径和材积总生长量与林龄进行回归方程拟合,拟合效果理想;拉氏栲各器官生物量表现为干〉枝〉根〉叶,各器官含水率表现为叶〉根〉枝〉干,单株平均含水率为41.9%;拉氏栲种群生物量为189 133 kg·hm^-2,种群净生产力为10507.39 kg·hm^-2·a^-1.

Research on Increment,Biomass and Productivity of Castanopsis Lamonteii Plantation

The increment, biomass and productivity of Castanopsis lamonteii plantation in Niumulin Nature Reserve of Fujian province were studied using method of stem analysis. The results showed that： the height, DBH and timber volume of C. lamonteii have reached 16.4 m, 15.85 cm and 0.17 m^3. There was 5 pinnacle in height growth, 3 pinnacle in DBH growth and 1 pinnacle in timber volume growth, the earliest year of growth pinnacle occurred in order of DBH, height and timber vol- ume. The annual growth curve of height and DBH presented large fluctuation, meanwhile, intersected with the average growth curve multiple times, the various growth curve of timber volume was the opposite. Simulated total increment of height, DBH and timber volume of C. lamonteii with tree age by regression equation showed ideal fitting effect. The biomass order of C. lamonteii organs was stem 〉 branch 〉 root 〉 leaf, and the distribution of moisture was leaf 〉 root 〉 branch 〉 stem, the average moisture content of single plant was 41.9%. The total biomass of 18-year-old C. lamonteii population was 189 133 kg. hm^-2, and its net productivity was 10 507.39 kg. hm^-2. a^-1.