对抗虫、感虫毛白杨无性系树皮内含物进行了比较分析 .结果表明 ,毛白杨树皮内含有 17种氨基酸 蛋氨酸 ,异亮氨酸 ,酪氨酸 ,精氨酸含量 ,抗虫高于感虫无性系 ,丙氨酸 ,脯氨酸含量 ,抗虫无性系低于感虫无性系 ;总糖含量低者抗虫 ,反之感虫 ;还原糖 ,可溶性总糖 ,蛋白质 ,总酚等含量与抗性没有明显的相关性 ;单宁含量高 ,还原糖 /单宁值以及可溶性糖 /单宁值低时 ,抗虫 ,反之感虫 The results showed that there were 17 kinds of methionine, isoleucine, tyrosine and arginine in poplar bark, The content of alanine and proline in the susceptible clones was lower than that in the susceptible clones. The lower the total sugar content was insects and insect pests, the other was the susceptible insects. The content of reducing sugar, total soluble sugar, protein, There was no obvious correlation between the content of phenol and resistance; the content of tannin, reducing sugar / tannin value and soluble sugar / tannin value were low,