梁山慈竹和硬头黄竹秆形结构和地上生物量分配特性

Culm Structure and Above-ground Biomass Allocation of Dendrocalamus farinosus and Bambusa rigida

以赤水市主要竹浆竹梁山慈竹和硬头黄竹为试材,对梁山慈竹和硬头黄竹竹节变化规律、地上生物量分配规律、构件生物量与调查因子的相关性进行了研究。结果表明:梁山慈竹和硬头黄竹竹节的分布都呈现“短-长-短”的分布规律。梁山慈竹和硬头黄竹地上部分各构件含水率平均值呈叶>秆>枝的趋势,叶的含水率分别是62.80%和54.77%。梁山慈竹和硬头黄竹两个竹种地上部分生物量随竹龄的增大而减少,表现为1 a生>2 a生>3 a生;同一竹龄两个竹种都表现为秆的生物量显著高于枝、叶,两个竹种地上部分不同构件生物量占地上生物量的比值都表现为秆占比例最大,分别为67.58%和73.54%,枝和叶构件的比例无显著差异。

Test bamboos were taken as the D.farinosus and Bambusa rigida in Chishui County,Guizhou Province of China.The node length of bamboo and the allocation pattern of above-ground biomass were then measured to determine the correlation of modular biomass and survey factors.The results showed that there was the trend of“short-long-short”in the bamboo node length of D.farinosus and B.rigida.The moisture content of two kinds of bamboos was ranked in the descending order of the leaf>stem>brand,where the moisture contents of leaf were 62.80%,and 54.77%,respectively.The above-ground biomass of two kinds of bamboos decreased with the increase of age class.The biomass of stems of two kinds of bamboos were higher than that of branches and leaves.The stem module was accounted for the largest proportion in each bamboo,which were 67.58%and 73.54%respectively.There was no significant difference between the proportion of branch and leaf in the two kinds of bamboos.