The impacts of ragweed on soil animals in reproductive period exceeded that in vegetative period,that of A. artemisiifolia exceeded that of A. trifida, that in pure ragweed community exceeded that in the community with ragweed and other plants.

• 豚草对土壤动物的影响 ,生殖生长期大于营养生长期 ,普通豚草大于三裂叶豚草 ,豚草纯群落大于豚草与其它植物混生群落。