Influence of growth stress level on wood properties in Poplar I-69 （Populus deltoides Bartr.cv."Lux" ex I-69/55

Six inclined poplar I-69 (Populus deltoids cv. I-69/55) trees were collected for studying the influence of growth stress level on wood properties. Growth stress indicator (GSI) was measured at 8 positions around the periphery of each trunk at breast height and corresponding wood samples were obtained. Wood anatomical, physico-mechanical and chemical characteristics were measured including cell diameter, fibre length, double wall thickness excluding gelatinous layer, lumen diameter after gelatinous layer removal, proportion of wood tissues, basic density, FSP, MOE, compressive strength, shrinkage and chemical composition. Each property was regarded in relation to the growth stress level to be discussed.

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