入侵植物土荆芥不同器官化感作用的差异研究

Study of Different Organs of Allelopathy of Invasive Plant Chenopodium ambrosioides L.

利用培养皿滤纸法,测定了土荆芥不同器官水浸提液对5种受体农作物种子萌发和幼苗生长的效应,初步研究了土荆芥对5种农作物的化感作用。结果表明:土荆芥植株干样、鲜样浸提液对5种受体农作物的种子萌发和幼苗生长均有明显的化感作用,且干样浸提液化感作用强于鲜样浸提液;土荆芥不同器官的化感作用强度不同,其作用强度顺序为:花>叶>根>茎。

Allelopathy played an important role in biological invasion. Chenopodium ambrosioides L. had a strong ability to invasion,but there was little research on the allelopathic influence of it. The allelopathy of C. ambrosioides L. was studied by the method of bioassay of culture plate and filter paper in the experiment in order to explore how the treatments with different organs extract of C. ambrosioides L. affected the growth and germination of 5 crops. The results showed that the aqueous extract of fresh and dry C. ambrosioides L. inhibited the germination and growth of young seedlings of the tested plants. The allelopathy of the aqueous extract of fresh C. amrosioides L. was stronger than that of dry. Allelopathy of different organs of C. ambrosioides L. had different effects on test plant. The order of restraining effect from strong to weak was flower,leaf,root,stem. The result can be a mechanism for the invasion, control and utilization of invasive plants,providing a certain degree of theoretical and practical basis.