Allometric equations for predicting the aboveground biomass of square bamboo, Chimonobambusa quadrangularis (Franceschi) Makino, were developed. To this end, 20 samples of C. quadrangularis were harvested, and the aboveground biomass of the culm and that of the branches and leaves were measured. The whole aboveground biomass of C. quadrangularis ranged from 128 g to 2,075 g, with the average of 910 g. The results showed that the culm diameter at breast height (D) was a better practical predictor of aboveground biomass than other culm attributes such as total culm length (H) and D²H. The allometric power exponent between biomass and D was larger in the culm (2.258) than in branches and leaves (1.262). The aboveground biomass partitioning to the culm increased from 46% to 75% with increasing D, which was lower than that of other bamboo species. This implies that the branches and leaves should be the indispensable components when quantifying the aboveground biomass of C. quadrangularis. The allometric equations presented here will be useful and beneficial when establishing the sustainable management strategy as well as evaluating the site productivity of C. quadrangularis stands.

建立了预测方竹地上生物量的异速方程。为此，收获了20个四角梭菌样品，并测量了茎秆和枝叶的地上生物量。四角梭菌的整个地上生物量为128 g至2,075 g，平均为910 g。结果表明，与其他茎秆属性（如总茎秆长度（H）和D ² H）相比，乳房高度（D）的茎秆直径是更好的地上生物量的实用预测指标。生物量与D之间的异速幂指数在茎中（2.258）比在树枝和树叶（1.262）中更大。随着D的增加，分配到茎秆上的地上生物量从46％增加到75％，低于其他竹种。这意味着在量化四角梭梭地上生物量时，枝叶应该是必不可少的组成部分。在建立可持续管理策略以及评估四边金线莲林分的生产力时，这里介绍的异速方程将是有用和有益的。