在牧草生长期间有效地控制田间杂草生长,能使牧草的产量及质量大幅提高,是牧草管理中不可忽视的环节。杂草对牧草造成威胁主要有两个比较关键的时期:一是在幼苗期,这个时期牧草幼苗生长较慢,很容易被杂草抑制生长,并对以后的牧草生长产生不良的影响。另外夏季温度高,雨水大,杂草生长迅猛,影响牧草的生长及产草量。杂草防除主要方法有下列几种:一、生物防除法:1.播前处理:在牧草播种前对土地应及时 Effectively control the growth of weeds in the field during the growth of forage grass can greatly improve the yield and quality of forage grass, which can not be ignored in pasture management. There are mainly two key periods in which weeds threaten forage: first, during the seedling stage, forage seedlings grow slowly and are easily weed-suppressed growth and have adverse effects on later forage growth. In addition the summer temperature is high, heavy rain, weeds grow rapidly, affecting the forage growth and yield. The main methods of weed control are the following: First, the biological control method: 1. Pre-sowing: the grass should be sown in time for the grass before sowing