黄花蒿对绿豆种子萌发及幼苗生长的化感效应

Allelopathic Effect of Artemisia annua L. on Seed Germination and Seedling Growth of Mung Bean

以绿豆种子为受体,采用室内生测法,探讨黄花蒿不同部位水浸提液对绿豆种子的萌发率、幼苗生长及叶绿素含量的影响。结果表明:黄花蒿各部位(根、茎、叶)水浸提液随处理浓度增加,对绿豆的化感效应增强,对种子萌发的抑制强弱为:叶>茎>根,且随处理浓度升高,发芽率降低;对幼苗的根系生长表现为低浓度(20mg/mL根、茎水浸提液)促进,当浓度高达40mg/mL均有明显抑制作用;幼苗高度总体降低,最高降幅分别为46.29%,47.67%和56.48%;叶绿素a和叶绿素b的含量也不同程度减少。可见黄花蒿影响绿豆种子萌发及幼苗生长,因此大面积栽培黄花蒿或绿豆种植应考虑黄花蒿的化感效应。

With mung bean （Vigna radiata L.）as receptor materials, the effects of aqueous extracts on the seed germination rate, seedling growth and chlorophyll content in different parts of Artemisia annua L.were studied by using interior bioassay method in laboratory. It was showed that the allelopathic effect increased with the increasing treatment concentration of the aqueous extracts of the root, stem and leaf of Arternisia annua L..The degree of inhibition of different sections in A.annua plant on mung bean seed germination was the following：leaf〉stem〉root, and the rate of seed germination decreased with increasing concentration of the aqueous extracts;when the root growth of the seedlings was treated by low concentrations （20 mg/mL aqueous extract from A.annua root and stem） ,its seedling growth was promoted,but obviously prohibited as concentrations reached up 40 mg/mL; the seedling height declined generally with the increase of concentration, the largest declines were 46.29%, 47.67 % and 56.48% respectively; and chlorophyll content a and b also declined at various degree.It was showed that A.annua affected the seed germination and seedling growth of mung seed.Therefore,it is necessary to consider the allelopathic effect of Artemisia annua L.when cultivation of Artemisia annua L.or mung beans in large areas.