入侵植物香丝草化感作用的生物测定

用入侵植物香丝草Conyza bonariensis(L.)Crong]地上部分的水浸提液对几种作物种子进行发芽试验,通过发芽率、根长以及苗高来研究香丝草的化感作用。结果表明,香丝草的化感作用是存在的,其水浸提液在高浓度下对供试作物种子活力、根长和苗高均有明显的抑制作用,而在低浓度下则对小麦苗高、绿豆和萝卜的根长具有促进生长的作用;香丝草水浸提液含有酚类物质。

Bioassay of Allelopathy in Invasive Plant Conyza bonariensis

The aqueous solution from the above-ground part of Conyza bonariensis(L.)Crong was used to treat the seeds of four crops,then the seed germination rate,root length,seedling height and simple vigour index were determined.The results showed that the allelopathic effects of C.bonariensis existed.Higher concentration of aqueous solution had significant inhibiting effect on the seed vigour,root length and seedling height,while low concentration of aqueous solution could stimulate the infancy development of Triticum aestivum L.,Phaseolus munge L.,and Raphanus sativus L.The aqueous solution of C.bonariensis contains phenol chemicals.