玉米制种成败的关键环节是花期能否相遇。一般来说,在玉米生育期间,母本比父本多1～2片叶或母本的生长锥比父本大一倍左右,花期可较好相遇。但由于播种期安排不妥,气候条件变化如干旱、雨涝、地力不匀、管理不当等各种因素对制种双亲产生不同影响的原因,常常出现玉米制种花期不遇或相遇不好的问题。为此,宜采取以下补救措施。 1.偏水偏肥促发育。在玉米制种田内选择3～5个有代表性的点,每点取有代表性的父母本2～3株,定期检 The key to the success or failure of maize seed production is whether the flowering can meet. In general, during the maize growth period, the female parent more than the father of 1 or 2 leaves or female parent growth cone twice the size of the female parent, flowering can better meet. However, due to improper sowing schedule, different climatic conditions such as drought, rain and flood, uneven soil fertility and improper management, the parents of seeding parents may have different effects on their parents. . To this end, the following remedial measures should be taken. Partial partial fertilizer to promote development. Select 3 to 5 representative points in the field of maize farming. Take 2 to 3 representative parents from each point,