Study on the Young-aged Wood of 13 Clones of White Poplar in Intensive Cultivation

Wood anatomy,fibre quality,microfibrillar angle of S2 layer of the secondary wall of the wood cell and the degree of relative crysta-llinity of the wood cellulose,chemical composition,wood density and pulp-making wood properties of 135-year-old White Poplar clones in intensive cultivation have been studied.The results show that for the 6 clones:Baihang 1,Baihang 17,Baihang 10,Linye,Xinmao and Wuming,the fibre length range is 845~917μm,the Cv(/LN) range 0.24~0.28,the total fibre ratio range 62.8%~64.7%,air-dried density range 0.41~0.519 g/cm3,the high yield pulp 87.7%~91.6% and the other properties,such as tear index,burst index,tensile index etc.,all of which are superior than those of the other clones.The above mentioned 6 poplar clones may be selected for further cultivation.