除草剂胁迫下3种牧草浸提液对受体植物种子萌发和幼苗生长的影响

为探明除草剂胁迫对3种牧草的化感作用,本研究采用室内生测法,采用不同推荐剂量的草铵膦和草甘膦分别处理紫花苜蓿(Medicago sativa)、黑麦草(Loliuim pererme)和红豆草(Onobrychis viciaefolia)幼苗,测定3种牧草浸提液对受体小白菜(Brassica chinensis)种子...

Three Forage Extracts on Seed Germination and Seedling Growth of Recipient Plants under Herbicide Stress

In order to explore the allelopathy of herbicide stress on three forages. In this laboratory bioassay study, the seedlings of alfalfa (Medicago sativa), ryegrass (Lolium perenne) and sainfoin(Onobrychis viciaefolia) were treated with different recommended dosages of glufosinate and glyphosate, respectively. To determine the effects of three forage extracts on the seed germination and seedling growth of the recipient Brassica chinensis, the allelopathy of forage was analyzed by combining allelopathy effect value, which was aimed at providing theoretical reference for weed control and scientific use of herbicides in forage field. The results showed that the three forage extracts had certain effects on the germination rate, germination potential, germination index, seedling height, maximum root length and vigor index of the recipient plants, and the maximum root length had the greatest effect, the allelopathic effects of the two herbicides were significantly stronger than that of the control, especially after glyphosate stress. The order of allelopathic effects on the tested forages was as follows:sainfoin > alfalfa > ryegrass. In conclusion, herbicide stress can significantly enhance the allelogenicity of alfalfa, sainfoin and ryegrass.