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玉米种子纯度是影响产量最重要的因素之一．而根据我们几年来承担的种植鉴定．无论是辽宁省，还是全国范围内．玉米种子纯度偏低的现象普遍存在．纯度达标率很低。应该尽力防杂保纯、提高制种田杂株率要求、改进去雄方式、利用高纯度亲本等综合措施抓起，扭转目前玉米种子纯度低的局面。
Maize seed purity is one of the most important factors affecting yield. And according to the identification we have been planting for several years. Whether it is Liaoning Province, or nationwide. The phenomenon of low purity of corn seeds is widespread. Purity compliance rate is very low. We should try our best to prevent pollution and increase the rate of miscellaneous crops in farming system. We should improve the method of demolishing farmland and use comprehensive measures such as high purity parents to start up and reverse the current situation of low purity of corn seeds.