水稻制种中，依据亲本的特征特性，结合本地区的气候条件、土壤情况和栽培技术等因素，确定好亲本的播期是水稻制种花期相遇的根本保障。做好叶龄调查和幼穗分化时期的剥查，掌握亲本的生育进程是进行花期调节的前提和依据。当亲本发育进程不同步时，要及时采取调节措施，前期以肥水调节为主，以抑为主，后期以“９２０”等激素调节为主，以促为主。改变移栽秧龄、喷施多效唑、提前割叶等措施对亲本的生长发育也有一定的调节作用。各种调节措施配合使用，可以达到更好的调控效果。 Rice seed production, based on the characteristics of the parents, combined with the climatic conditions in the region, soil conditions and cultivation techniques and other factors to determine the good sowing date is the fundamental guarantee of rice seedling encounter. To do a good job of leaf age investigation and spike differentiation stage of the investigation, to grasp the parental process of reproduction is the prerequisite and basis for flowering regulation. When the process of parental development is not synchronized, we should take timely regulatory measures, pre-fertilizer and water-based regulation, mainly to suppress the latter to “920” and other hormone-based, to promote the main. Change the transplanting seedling age, spraying paclobutrazone, cutting leaves and other measures in advance of the parental growth and development also have some regulatory role. With the use of a variety of regulatory measures, you can achieve better regulatory effect.