入侵杂草圆叶牵牛的化感作用研究

Study on Allelopathic Effects of the Invasive Plant Ipomoea Purpurea

采用生物测定法研究入侵杂草圆叶牵牛对白菜种子萌发和幼苗生长的影响。结果表明:较低浓度的圆叶牵牛浸提液对白菜种子的萌发有促进作用,且随浓度的增高抑制作用加强;浸提液对白菜根的生长基本上表现为抑制作用;浸提液对白菜苗的生长表现为中、低浓度时促进,高浓度时抑制。

Biological test was adopted to study the effect of invasive plant Ipomoea purpurea on the seed germination of Chinese cabbage and the seedling growth. The results show that when treated with lower concentration of the water extract from Ipomoea purpurea, the seed germination could be promoted, and the inhibition increases with the increasing of the concentrations; most water extract could restrain the root growth of Chinese cabbage; extracts of middle and lower concentrations could accelerate growth of seedlings while extracts of high concentrations inhibit the growth of seedlings.