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1设置隔离,避免串粉玉米是异花授粉作物,花粉很轻,容易随风传播,因此制种设置隔离区是保证甜玉米杂交种纯度的重要条件。一般要求空间隔离500m左右,可根据开花季节的风向、田间种植作物的高矮及有无树带等情况适当调整隔离距离,但最短距离不少于350m;也可利用山峰、森林在特殊地理位置进行隔离;时间隔离,要与其他玉米的开花期错开20~25d。2亲本种子处理播种前要精选玉米亲本种子,去除杂粒、病粒。并在晴天把选好的种子晒1~2d。利于出苗整齐一致,培育壮苗。
1 set the isolation, to avoid stringy corn is cross-pollination crops, pollen is very light, easy to spread with the wind, so seed setting quarantine area is to ensure the purity of sweet corn hybrids important conditions. The general requirements of the spatial isolation of about 500m, according to the flowering season of the wind direction, the height of the field planting crops with or without tree belt and other circumstances appropriate to adjust the isolation distance, but the shortest distance of not less than 350m; can also use the peaks, forests in special geographical locations Isolation; time isolation, staggered with the flowering of other corn 20 ~ 25d. 2 parent seed treatment Prior to sowing corn seed selection Featured, remove particles, sick tablets. And sunny in the selected seed drying 1 ~ 2d. Conducive to emergent neat and consistent, nurturing strong seedlings.