Distribution Pattern of Above-ground Biomass and Culm Form Characteristics of Bambusa blumeana | 竹地上生物量分配格局及秆形结构特征

Chinese. 【目的】研究了丛生竹种莉竹（Bambusa blumeana）地上生物量分配格局及秆形结构特征，以期为莉竹的综合开发利用提供理论依据和数据支撑。【方法】参考“毛竹林的调查方法”与SPSS统计软件分析方法。【结果】莉竹地上各器官中，叶片含水率最高，达49．8％；竹秆的干生物量比例最大（73．5％），其次为竹枝（15．1％）和竹叶（11．4％）。秆形特征主要分析了秆高、胸径、鲜秆质量、尖削度、竹壁厚、节间长等指标，其中，筒竹全高（y／m）对胸径（x／cm）的拟合方程为：Y=～0．4197x2＋9．0749z=27．817（R2=0．9586）；鲜秆质量（y／kg）对胸径（x／cm）拟合的幂函数方程为y=0．1454x“（R2=0．9703）；壁厚随竹秆高度变化的拟合方程为Y=0．9897x2“’。（R2=0．9717）。【结论】在竹种的加工利用过程中，生物量分配格局和秆形特征是决定竹材利用率及加工方向的重要指标，本研究为筋竹的开发利用提供了理论参考。

English. [Objective] The purpose of this study was to investigate the distribution pattern of a- bove-ground biomass and culm form characteristics of B. bZurneana, which may be helpful to pro- vide a theoretical reference and data support for its development and utilization. [Method] The in vestigation method of Phyllostachys pubescens and statistic software of SPSS were used in this study. [Results] Among the above-ground organs, the moisture content of leaves （49.8%） were much higher than those of other organs. Culm dry biomass was 73.5 %, which was much greater than those of branches （15.1%） and leaves （11.4%）. The indicators of culm characteristics in this study mainly included culm height, diameter at breast height （DBH）, culm weight, culm ta- per, wall thickness and internode length. The model of culm height （y/m） to DBH （x/cm） was y =-0.4197x2＋9.0749x-27.817 （R2=0.9586）. The model of fresh culm weight （y/kg） to DBH （x/cm） was y=0. 145 4x24616（R2 =0. 970 3）. The model of wall thickness （y/cm） to culm height （x/m） was y = 0. 989 7x175 （R2= 0. 971 7）. [Conclusion] Blomass distribution pattern and culm form characteristics were important indicators which determined the direction of utilization and processing. This research provides a theoretical reference for the development and utilization of B. blumeana.