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水果苗圃一般都处于土壤肥力、水源条件较好的场地,而且生产周期较长,一般二周年以上,田间杂草生长快,种群复杂。在雨水较多季节,杂草生长速度更快,用人工除草法或喷灭生性除草剂,即使是干旱季节,两次除草时间相隔一个月,杂草已严重为害,影响苗木根系及枝干的生长。这里介绍的二次施药法,是指10天内连续两次施药,第一次喷灭生性除草剂,第二次用灭生性除草剂混合芽前除草剂喷施。具体方法是:当杂草长出10～15厘米时(少量
Fruit nurseries are generally located in the soil fertility, water conditions better site, and the production cycle longer, generally more than two years, field weeds grow fast, the population is complex. In more rainy seasons, weeds grow faster, using artificial weeding or spraying of herbicides, even in the dry season, the weeds have been severely damaged for one month after weeding twice, affecting the root and branch of seedlings Grow. The secondary application method introduced here refers to spraying two consecutive times within 10 days, spraying the first time with the herbicide and spraying the second time with the herbicide with the extinct herbicide. The specific method is: When weeds grow 10 to 15 cm (a small amount