<正>本文用分层切割法测定了样木地上部分各器官生物量,用壕沟法测定地下部分根系生物量,用“相对变比生长”模型估得22年生木荚红豆树的林分生物量。结果表明:22年生林分生物量为165.165t/ha,其中乔木层为161.571 t/ha;平均净生产量为8.933 t/(ha·a)(乔木层7.344 t/(ha·a)),乔木层中树干(包括树皮)、枝、叶和根系的生物量分别为83.572、40.039、15.526和24.474 t/ha。用Logistic生长方程拟合各解析木数据表明:胸径、树高和材积速生期分别出现在9～12,9～14和15～17年生左右。该林分尚属生长旺盛期。

Fitted with component biomass data of individual trees with variable allometric rates model for armosia xylocarpa plantation stands in 22-year-old, the result showed that total stand biomass was 165. 165 t/ha, crops were 161. 571 t/ha, average net production was 8. 983 t/(ha ?a) (Crops were 7. 344 t/(ha ?a)). Components biomass were 83. 572, 40. 039, 13. 526 and 24. 474t/ha for stem (wood and barks), branches, leaves and roots respectively. Based on the DBH, the result from tree hight and timber volume data of analysis tree with Logistic increment equation showed that fast growing stage was 9-12, 9-14 and 15-17 year-old for DBH, tree hight and timber volume respectively.