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采用盆栽与大田试验相结合的方式，筛选出了二季晚稻中后期生长发育化学调控剂的最佳配方，明确了最佳配方的合理施用时期及次数。４ 种配方化控剂的增产效应依次为 Ｂ＞ Ｄ＞ Ａ＞ Ｃ，其中 Ｂ、 Ｄ 两配方比 Ｃ Ｋ 显著增产，增幅为７ ．４０ ％ ～１４ ．０８ ％ 。经济有效的化控方案为：对稻穗包颈现象严重的品种，于孕穗期喷施一次 Ｄ 配方化控剂。对稻穗包颈现象不严重的品种，于抽穗期喷施一次 Ｂ 配方化控剂，每次用药量７５０ｋｇ／ｈ ｍ ２ 。
The best formula of chemical regulators for growth and development of late season rice in the second season was screened by pot and field experiment, and the rational application period and times of the best formula were clarified. The effects of four kinds of formulations were: B> D> A> C, in which B and D increased significantly compared with C K by 7%. 40% ~ 14. 08%. Cost-effective program of chemical control: for the phenomenon of severe cases of panicles in the panicle of rice, spraying once in the booting stage D formulation control agent. In the case of the earring which is not serious in the neck of the rice, B formulating control agent is sprayed at the heading stage with a dosage of 750kg / hm 2.