玉米制种区父、母本花期能否相遇是杂交制种成败的关键。在制种实践中,尽管确定父、母本播期具有科学依据,但因气候、墒情等因素造成双亲花期不调,甚至不遇的现象,仍有可能 Maize seedling area parent and female parent flowering is the key to the success of hybrid seed production. In the practice of seed production, although the determination of the sowing date of the parent and the female has a scientific basis, it is still possible that due to the factors such as climate and soil moisture, the flowering period of the parents is not adjusted or even not met