花吊丝竹立竹构件与生物量关系的研究

Studies on Relationship between Biomass and Modules of Dendrocalamus minor var. amoenus

对大型优良丛生竹花吊丝竹(Dendrocala musminor var.amoenus)1～4a生的立竹构件与生物量的关系进行了研究。结果表明:立竹胸径与其他立竹构件间达显著(P<0.05)或极显著相关(P<0.01),立竹胸径与立竹全高(R2=0.7804,Radj2=0.7682,F=63.9525,P<0.0001)、立竹枝下高(R2=0.5017,Radj2=0.4741,F=18.13,P=0.0005)均呈线性关系,与立竹平均壁厚率呈二次多项式关系(R2=0.7728,Radj2=0.7559,F=45.9109,P<0.0001);立竹胸径、立竹全高均与器官生物量呈极显著正相关,构建了立竹胸径、立竹全高与器官生物量间的逐步回归模型,模型检验相关参数R2>0.66,F>15,P<0.0052。1～2a生立竹器官生物量由立竹胸径、立竹全高决定,3～4a生立竹器官生物量由立竹胸径决定。

The relationships between modules Modular and biomass of Dendrocalamus minor var. arnoenus were studied. The results showed that diameter at breast height （DBH） had significant correlation with other components. The DBH was linear to total height （H）, height under branch （L）, with R^2=0.5017 ,Radj^2=0.4741 ,F= 18.13, P = 0.0005, R^2 = 0.7804, Radj^2 = 0.7682, F = 63.9525, P 〈 0.0001, respectively, and had quadratic polynomial relation to wall thickness ratio, with R^2 = 0.7728, Radj^2 = 0.7559, F = 45.9109, P 〈 0.0001. The relationship between organ biomass and DBH, H were significant, and the stepwise regression model （R^2〉0.66,F〉 15,P 〈0.0052） was established of 1- 4-year-old bamboo. It indicated that the biomass of 1- and 2-year-old individuals were determined by DBH and H, while those of 3-, and 4-year-old individuals were only by DBH.