ragweeds

Profile sampling method, macro-group classification method, and statistical method were used to study the community structure and dynamics of soil insects in ragweeds Ambrosia artemisiifolia and A.

采用分层取样法、大类群分类法和数理统计方法，研究了普通豚草Ambrosia artemisiifolia和三裂叶豚草A。

Ragweeds reduced the individual number and community diversity of soil insects. According to the results of monthly ANOVA and LSD, in August and September the individual number and diversity indices of soil insects in the control plot without ragweeds were significantly higher than those in ragweed plots.

豚草降低了土壤昆虫的个体数量和群落多样性，根据逐月方差分析和多重比较，8月和9月对照样地土壤昆虫个体数量和多样性指数均显著高于豚草样地。

Comprising the ragweeds; in some classification considered the type genus of a separate family ambrosiaceae.

包含豚草；在有些分类中被作为一个独立的豚草科的模式属。

According to law of community succession, using perennial herbs and shrubs that later successional species displace ragweeds is an ecological control method of weeds.

用演替中后期出现的有经济价值的多年生草本和灌木取代豚草种群，是一种生态防除豚草的有效方法。

In some classifications considered a separate family comprising a subgroup of the Compositae including the ragweeds. any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma.

在某些分类中认为是豚草属中菊科小群中的一科。北美洲任何构成豚草属的植物，有变应原的花粉，治疗花粉热和气喘。