[目的]研究杨树品种各生长指标的差异,筛选优良品种.[方法]利用全国森林清查调查材料,用数理统计方法,检验各杨树品种间的差异性.[结果]各树种间指标波动性不大,泰青杨、I-69杨、加拿大杨与其他树种表现出显著性差异.可淘汰泰青杨、I-72杨,适当发展I-69杨和加拿大杨,作为对照的泡桐也可适当发展.[结论]该研究可为杨树的速生丰产提供科学依据.%[Objective]To study the differences of indexes of Populus L.varieties and to select good varieties.[Method]Make full use of the national forest inventory survey materials,the differences of the Populus L.varieties were tested by using mathematical statistics method to test.[Result]The results showed that there was little fluctuation between the tree specie,Taiqingyang,I-69 yang,Populus L.canadensis Moench showed significant differences though comparing with other varieties.[Conclusion]The study can provide scientific basis for the rapid growth of Populus L..
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