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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。
In this paper, the stratified cutting method was used to determine the biomass of various parts of the aerial parts of the sample. The underground biomass of the underground part was determined by the trenching method. The stand biomass of the 22-year-old M. virginiana tree was estimated by the “relative variable ratio growth” model. The results showed that the biomass of 22-year-old stands was 165.165 t / ha, of which the tree layer was 161.571 t / ha and the average net production was 8.933 t / (ha · a) (7.344 t / (ha · a) The biomass of tree trunks (including bark), branches, leaves and roots in tree layers were 83.572, 40.039, 15.526 and 24.474 t / ha, respectively. Logistic growth equation fitted to each analytical wood data showed that: DBH, tree height and rapid growth rate of the material appeared in 9 ~ 12, 9 ~ 14 and 15 ~ 17 years old or so. The stand is still a strong growth period.