紫茎泽兰对三叶鬼针草的化感作用研究

Studyon the Allelopathy Effect of Eupatorium adenophorum(Spreng)on the Bidens pilosa L

为了探索紫茎泽兰对三叶鬼针草的化感作用,研究了紫茎泽兰叶片水浸液和枯落物对三叶鬼针草种子萌发及幼苗生长的影响。结果表明,紫茎泽兰叶片水浸液对三叶鬼针草种子萌发有一定的抑制作用,随着浓度越多的增加,种子发芽率逐渐降低,3%浓度时,种子已不能萌发,对胚根的抑制作用强于胚芽,对幼苗的生长有微弱的促进作用;枯落物水浸液对种子的萌发抑制作用弱于叶片水浸液,枯落物添加量,三叶鬼针草长势越好,能够促进植株体内物质的积累。说明三叶鬼针草能够在紫茎泽兰入侵地上生长良好,可以采用三叶鬼针草代替紫茎泽兰,为紫茎泽兰的防控发挥作用。

The experiment was conducted to find the effects of water extract of Eupatorium adenophorum （Spreng.） leaf and leaf litter on the germination and seedling growth of Bidens pilosa L. and to explore allelopathic effects of Eupatorium adenophorum （Spreng.） on Bidens pilosa L. Results showed that the water extract of Eupatorium adenophorum （Spreng.） leaf had certain inhibitory effect on seed germination of Bidens pilosa L., with the increase of concentration, the seed germination rate decreased gradually, when the concentration was 3%, the seeds could not germinate; inhibitory effect on the radicle was superior to that on the germ, and showed weak promotion effect on the growth of the seedlings. The inhibition effects of extract of litter on seed germination was weaker than that of leaf water extracts, with the increase in litter amount, Bidens pilosa L. grew better and accumulation of material in the plant was promoted. The conclusion suggests that the Bidens pilosa L. grow well on the ground invaded by Eupatorium adenophorum （Spreng.）, so Bidens pilosa L. can be used instead of Eupatorium adenophorum （Spreng.）, plays a role in the prevention and control of Eupatorium adenophorum （Spreng.）.