Abstract: In Shu County, Huaibai Plain, 36 sample trees of Populus deltoides cv."Lux" ex Ⅰ-69/55 were collected from three poplar fertilization trial plantations (trial plantations of N+organic fertilizers, P+K and check) to study thewood anatomy, chemical composition and wood physical strength of thesetrees. The results are as follows: 1. In the fertilized plantations, the poplarsgrow fastor, wood fibre length, amount of acellulose, and holocellulose,and wood airdry density of these trees lower down a little; after the testingof variance analysis, their variances does not reached remarkable level; 2.The poplars with a fastest growth in the trial plantation of N+ organic fertilizerc, whose rate of gelatinous fibre is higher, but their crushing strength,bending strength, shear parllel to the grain shearing strength and hardnessdecline to a certain extent separately; the decline variances of shear to thegrain shearing and hardness haven't reached remarkable level.

Key words: Populus delioides Bartr cv. "Lux"ex I-69/55, Fertilization effect, Wood property