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草害是影响夏玉米制种壮苗的重要因素之一。1984年,我们在郊区千亩玉米制种基地试验示范了化学除草新技术,取得显著效果。制种基地地多人少,每户制种5亩以上的占63%,多的15亩以上,劳力显得特别紧张。夏玉米生长期间温度高,雨水多,杂草生长快,除草不及时往往造成草荒。玉米自交系又比杂交种长势弱,造成草荒后对产量影响很大。为此,我们积极推广化学除草剂,每亩比人工除草可节省费用57%,收到工省效宏的效果。
Grass damage is one of the important factors affecting seed production of summer maize. In 1984, we experimented and demonstrated new chemical weeding technologies on the acres of corn seed base in the suburbs and achieved remarkable results. Seed production base to a small number of people, more than 5 acres of seed production per household accounted for 63%, more than 15 acres, labor is particularly tense. Summer corn growing during high temperature, rain, weeds grow fast, weeds often do not cause grass shortage. Maize inbred lines and hybrids grow weak, resulting in a significant impact on the yield after the grassland shortage. To this end, we actively promote chemical herbicides, which can save 57% of the cost per acre compared to artificial weeding, and receive the effect of saving the macro effect.