不同牧草混播方式对冬闲田杂草发生及种类的影响

摘要

为了解冬闲田播种的不同种类牧草田的杂草群落发生动态，调查了30％黑麦草＋70％白三叶，30％黑麦草＋70％紫云英，30％黑麦草＋70％紫花苜蓿，3种不同牧草混播处理下冬闲田杂草的生长特点。结果表明：牧草混播种类的变化使冬闲田杂草的发生有差异，主要表现为杂草种类和危害程度不同，其中以30％黑麦草＋70％紫云英处理下的冬闲田杂草危害程度最低。%In order to understand the dynamics growth of weeds during fallow winter season,experiments of forage grasses mixture were carried out:30% ryegrass mixed with 70% white three leaves (Treatment 1 ),30% ryegrass mixed with 70% milk vetch (Treatment 2),and 30% ryegrass mixed with 70% alfalfa (Treatment 3).The results indicates that:weed species and damage degree of weeds of different forage grasses mixture were different.The damage of weeds in winter fallow fields was minimum under the treatment of 30% annual ryegrass mixed with70% milk vetch.