花吊丝竹地上部分生物量分配及立竹生态构件关系特征

在福建省华安县竹类植物园研究了1～3年生花吊丝竹地上部分生物量分配和主要生态构件因子间的关系。结果表明:立竹地上部分器官含水率为竹叶>竹枝>竹秆,竹秆、竹枝含水率随立竹年龄的增长而降低,不同年龄立竹竹叶含水率无显著差异;1～3 a立竹器官生物量分配比例均为竹秆>竹枝>竹叶,竹秆生物量比例随立竹年龄的增长呈"V"型变化,竹枝、竹叶生物量比例随立竹年龄的增长而提高;立竹全高、枝下高是立竹胸径的从属因子,器官和地上部分总生物量与立竹胸径、全高呈显著或极显著正相关,可以用生物量相对生长模型模拟;立竹壁厚率从竹秆基部到顶部呈高—低—高分布规律,与立竹胸径、立竹全高分别呈极显著、显著负相关,与立竹胸径的关系方程式为AWT=0.2899-0.0539D+0.0041D2。

Study on above-Ground Biomass Allocation and Ecological Component Characteristic of Dendrocalamus minor var. amoenus

The 1～3-year-old bamboo were sampled to research the relationship between the biomass and ecological component factor in the Bamboo Plant Garden in Hua'an,Fujian.The results indicated that water content of above-ground organ was ordered by leaf>branch>culm,and there was a significant negative correlation relationship between bamboo age and water content of branch and culm,and not different between that of leaf with different ages.1～3a old biomass organ above ground partition was ordered by culm>branch>leaf.With the increase of age,culm biomass showed "V" shape variation trend,and biomass of branch and leaf increased.Total height and branch height was dependent factor of DBH,and significant or highly significant positive correlation was found between DBH,total height and organ and total biomass,which were simulated by biomass relative growth model.The wall thickness showed high-low-high tendency from bottom to top of bamboo,which had extremely significant and significant negative correlation with DBH and total height.The equation of DBH and wall thickness relation was AWT=0.2899-0.0539D+0.0041D2.