淡竹林分结构与林分因子相关研究

Related research on structure characteristics and stand factors of Phyllostachys glauca

以中原地区淡竹林为对象,对不同立地条件下淡竹林分结构进行方差分析及主成分分析,研究结果表明:淡竹林结构因子中的立竹密度、胸径、枝下高、整齐度、均匀度差异显著;壁厚、秆高、秆重差异不显著。其立竹胸径、株高、枝下高、整齐度、秆重、总重存在显著相关关系。主成分分析表明,胸径,株高、秆重、均匀度和密度是淡竹林分结构因子主成分,贡献率达88.17%。提出淡竹林中原地区优良淡竹林分标准:其中,林分密度20 000株/hm2、胸径5 cm、株高10 m、枝下高7 m、秆重6 Kg,林相整齐均匀。

Bamboo forests in central plains play an important role in the used bamboo resources of China.The high yield structure of Phyllostachys glauca for different types of irrigation bamboo was studied.The investigation results of P.glauca show that there were significant differences in stand density,diameter at breast height,under branch height,uniformity and evenness of different types of P.glauca;whereas,the differences in bamboo wall thickness,plant height and culm weight were not significant;the correlations among diameter at breast height,plant height,under branch height,uniformity,culm weight and total weight were remarkable;The diameter at breast height,plant height,culm weight,uniformity and density accounted for 88.17% of the principal component of bamboo stand structure factors.The excellent standards of stand structure for P.glauca in China central plains area were put forward,they are： stand density 20 000 plants hm-2,diameter at breast height 5 cm,plant height 10 cm,height under branch 7 cm,culm weight 6 kg and forest form tidiness and uniform.