偏迟 熟中粳 在淮北地 区种植产 量水平 高，但 若抽 穗过 迟或 熟 期过 晚， 则不 能稳 产， 甚至不能成 熟。我们 通过查 阅１９５０ ～１ ９９８ 年４９ａ 的 气象资 料，明确了 我市粳 稻的最佳 抽穗期 为８ 月２０～３０ 日，安 全齐穗期 为９ 月５ 日，最 迟成熟期 为１０ 月１８ 日。 本文总结 了偏迟熟 中粳早 丰９ 号的适期早播 、扩行缩 株、均衡 施氮等高 产配套技 术。 Late ripening medium Japonica rice planted in Huaibei high level of production, but if heading too late or late maturity, you can not stable, or even not mature. By referring to the meteorological data of 49a from 1950 to 1998, we found that the best heading date for japonica rice in our city is August 20-30, the safe heading date is September 5, and the latest maturity date is October 18 . This paper summarizes the late maturing early Japonica Xifeng 9 early sowing date, expansion of reduced strains, a balanced production of nitrogen and other high-yielding technology.