Abstract: Large-area grain producers adopt mechanical transplanting cultivation in double seasons rice, would aggravate the contradiction of late season rice varieties in Yongkang city, Zhejiang Province. 7 new double cropping late rice varieties of indica and japonica hybrids which suitable for mechanical transplanting and cultivating locally were screened in this experiment. The suitable sowing dates were also provided. This result will guide large grain producers to achieve high yield for late rice.

Key words: double cropping late rice, variety, sowing date, safety full heading, high yield

摘要： 在浙江，如果种粮大户早晚稻双季都采用机插栽培，大大加剧了前后季品种搭配矛盾。通过试验筛选出7个适合永康作连作晚稻机插栽培的籼粳杂交稻品种，并确定了适宜的播种期，以指导种粮大户夺取晚稻丰收。

关键词: 连作晚稻, 品种, 播种期, 安全齐穗, 丰产