闽粤栲人工林生物量研究

The biomass of Castanopsis fissa plantation

利用树干解析计算分析福建省牛姆林自然保护区22年生闽粤栲人工林的生长量、生物量及生产力特征。结果表明:闽粤栲树高、胸径和材积总生长量分别达到16.5 m,19.5 cm和0.27 m3,期间分别出现3次、5次和2次生长高峰,其中,树高和胸径生长高峰出现年份一致,材积生长高峰出现相对滞后;树高、胸径连年生长量曲线与平均生长量曲线出现多次相交,材积各生长量曲线基本不相交且变化幅度相对较小;将闽粤栲树高、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;闽粤栲各器官生物量表现为干>枝>根>叶,各器官含水率表现为根>干>枝>叶,单株平均含水率为48.05%;闽粤栲种群生物量为295 261 kg/hm2,种群净生产力为13 420.95 kg/(hm2·a)。

The increment,biomass and productivity of Castanopsis fissa plantation in Niumulin Nature Reserve of Fujian Province were studied using method on stem analysis. The results showed that： the height,diameter at 1. 3 m（ DDBH） and timber volume of Castanopsis fissa reached 16. 5 m,19. 5 cm and 0. 27 m3. There was 3 pinnacle in height growth,5 pinnacle in DDBHgrowth and 2 pinnacle in timber volume growth. The high growth rate of DDBHwas consistent with the year of height growth while timber volume was relatively backward. The annual growth curve of height intersected with the average growth curve multiple times and changed drastically. While the various growth curve of timber volume nearly disjoint and little changed. Simulating total increment of height,DDBHand timber volume of C. fissa with tree age by regression equation showed ideal fitting effect. The biomass order of C. fissa organs was stem 〉 branch 〉 root 〉 leaf,and the distribution of moisture was root 〉 stem 〉 branch 〉 leaf,the average moisture content of single plant was 48. 05%. The total biomass of22-year-old C. fissa population was 295 261 kg / hm2,and its net productivity was 13 420. 95 kg/（ hm2·a）.