为明确银胶菊的花组织对稗草的化感作用及其活性物质成分,采用培养皿法和室内盆栽法,研究了其水浸提液的乙酸乙酯相、正丁醇相和剩余水相对稗草生长的影响。结果表明,乙酸乙酯相的化感抑制活性最高,其中,温室盆栽试验中对稗草萌发、株高、鲜重的抑制率分别为11.1%、10.2%和14.6%。采用GC-MS技术,从乙酸乙酯相较高活性组分中分离鉴定了15种主要化合物,分别为烃类及其衍生物、萘类、醇类、苯类、酸类、酮类和酯类。 In order to clarify the allelopathic effect of the flower tissue of guayule on the Echinochloa crusgalli and its active substances, the ethyl acetate phase, the n-butanol phase and the remaining water Relative to the growth of barnyardgrass. The results showed that the ethyl acetate phase had the highest allelopathic inhibitory activity. Among them, the inhibition rates on the germination, plant height and fresh weight of barnyardgrass in greenhouse were 11.1%, 10.2% and 14.6%, respectively. Fifteen main compounds were isolated and identified from the higher active components of ethyl acetate by GC-MS. They are hydrocarbons and their derivatives, naphthalene, alcohols, benzene, acids, ketones and esters class.