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我场杂交玉米制种工作,已搞了二年。今年种了18.8亩,收到母本8169斤,平均单产447.6斤。父本2231斤,平均单产123.2斤。实践证明,玉米制种是能够获得高产的。一、花期相遇问题玉米是一种喜温作物,玉米制种期的气温是由低到高,早期在低温控制下生长发育,后期受强光高温影响。所以制种成败与产量高低,关键在于安全授粉期内,父、母本的花期是否相遇?为此,必须了解父、母本的
My field hybrid corn seed work, has been engaged in two years. This year planted 18.8 acres, received 8,169 pounds of female parent, the average yield 447.6 pounds. Father of 2231 pounds, the average yield of 123.2 pounds. Practice has proved that corn seed is able to obtain high yield. First, the flowering encounter Maize is a hi-temperature crop, the temperature during maize seeding is from low to high, early growth and development under the control of low temperature, late by the glare high temperature. Therefore, the success or failure of seed production and the level of output, the key lies in the safe pollination period, the parental flowering date is met? To this end, we must understand the parental