适当增加母本行数减少父本行数是夺取玉米制种高产的有效措施。河北乐亭种子公司经多年试验示范证明,父母本行比由1:5加大到1:8,母本占地率提高5.5％,母本株数亩增加302—330株,而结实率只差0.2—0.5％。由于母本株数的增加,亩制种量增 Properly increasing the number of female parent rows and reducing the number of male parent rows is an effective measure to seize high yield of maize seeds. Hebei Laoting Seed Company after years of demonstration shows that the proportion of parents increased from 1: 5 to 1: 8, the occupancy rate of the mother increased by 5.5%, the number of female parent plants increased by 302-330 acres, while the seed setting rate was only poor 0.2-0.5%. Due to the increase in the number of female parent plants, the increase in the amount of mu produced