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金华几年来早季制种试验研究结果表明,早制条件下父母本播始历期延长,出叶、分蘖缓慢,抽穗开花快而集中,主茎叶片数和有效积温则相对较稳定,故确定父母本播差及花期相遇标准时应有别于夏制;早制适宜始穗期在7月10～15日,隔离条件好的也可安排在7月16日前后,以利于晚稻早栽高产;早制以早、中熟组合最为适宜,其次是密阳46配组的近熟组合;晚稻以特早熟晚粳品种为宜,制种田成熟早的也可适当搭配中迟熟晚粳糯品种;早制优质高产的技术关键在于安排好父母本播差,建立稳产高产苗穗结构,适当增加“九二0”用量,减轻高温低湿天气对抽穗扬花的不良影响及防止水泥地高温烫种。
The results of early-season seed production experiment in Jinhua over the past few years show that under the conditions of early growth, the parents extended the duration of their sowing, leaf out, tillering slowly, fast and concentrated flowering and heading, and the number of main stem leaves and effective accumulated temperature were relatively stable To determine the parents of sowing and flowering meet standards should be different from the summer system; early heading appropriate heading date in July 10 to 15, the isolation conditions may also be arranged around July 16, in order to facilitate early rice high yield late rice ; The best combination of early maturity and medium maturity was most suitable for the early maturing date, followed by the maturing combination of Miaoyang 46 maturity group; the late maturing date was the special precocious late japonica variety, ; The key to the early high-quality and high-yielding technology lies in arranging the sowing of the parents and establishing a stable and high-yielding plantlet structure, appropriately increasing the dosage of “920”, alleviating the adverse effects of the high temperature and low humidity on heading and flowering, and preventing the high temperature scalding of the cement.