杂草的人工防除是苗圃管理中，特别是当年播种苗圃的一项繁重而艰巨的劳动，不仅费工、费时，而且劳动强度大。再加上苗木初期生长缓慢，很难与一些杂草竞争，稍不及时就容易形成草荒，严重影响苗木生产。因此，苗圃田化学除草技术的研究已成为生产中亟待解决的问题。为提高生 Artificial control of weeds is a heavy and arduous task in nursery management, especially in the year when planting nurseries, which is not only labor-intensive, time-consuming but also labor-intensive. Coupled with the early growth of seedlings slow, it is difficult to compete with some weeds, a little less likely to form grassland in time, seriously affecting the production of seedlings. Therefore, nursery field chemical weeding technology has become an urgent problem in production. To improve students