Comparative Analysis of Culm Form and Timber Characteristics in Three Dendrocalamus Species
牡竹属三竹种的秆形质量与材性比较

Culm form and timber properties of Dendrocalamus mino, Dendrocalamus asper and Dendrocalamus brandisii was comparative analyzed. The results indicated that there was significant difference on height under branch and very significant difference on relative total height amony three bamboo species. Diameter at breast height(DBH), total height, height under branch, taper and wall thickness ratio of D. brandisii was the biggest one of three bamboo species, and relative height under branch was smallest of them. With the increase of bamboo age, water content of bamboo culm decreased significantly, and ordered by D. minor> D. brandisii > D. asper. The relative volume of D. brandisii, D. minor, D. asper was 1771.35cm3.cm-1, 1166.66 cm3.cm-1,659.78 cm3.cm-1 respectively, and very significant difference was found among bamboo species. With the increase of bamboo age, timber density increased significantly, the highest was found in D. minor, middle in D. brandisii and lowest in D. asper. Timber density of 3a D. minor, D. brandisii and D. asper was 0.914 g.cm-3, 0.812g.cm-3, 0.749 g.cm-3 respectively. All results was summarized that D. minor with graceful culm form and elegant weeping top-branch was suitable to be used for garden and urban landscaping or shooting, otherwise D. brandisii with best culm form, biggest culm biomass and timber volume was more suitable used for timber and shoot production.