Abstract:Abstract:In order to realize the relationship between green moisture content of bamboo, linear shrinkage rate, dry density, bending strength, elastic modulus of bending and compressive strength and the processing in utilization for two years to seven years Phyllostachy pubescens, which were studied by author. The result indicated that: green moisture content of bamboo and linear shrinkage rate of bamboo were decreased with age. With the increase of height from root to top, moisture content of fresh bamboo and linear shrinkage rate of bamboo were also decreased. The linear shrinkage rate of bamboo in different directions follows the order of tangential direction＞radial direction＞longitudinal direction. Dry density, bending strength, elastic modulus of bending and compressive strength of Phyllostachy pubescens were increase with the increased age. The differences of physical and mechanical properties between two years bamboo and three years bamboo are significant while the differences among bamboos with longer than three years age are insignificant. With the increase of height from root to top, dry density, bending strength, elastic modulus of bending and compressive strength parallel to grain of the bamboo increased. Three years bamboo is most suitable for harvesting with respect to the physical and mechanical properties of bamboo, as well as the economical benefits of bamboo wood. And the cut bamboo should be classified according to the parts of bamboo, which can improve the physical/chemical performance and quality stability of bamboo product as well.
