In order to investigate the ecological adaptability of late rice varieties for disaster relief after flood disaster, a so-wing date experiment was carried out in Hunan with 8 Japonica rice varieties with different growth duration introduced from Northeast China. The results showed that:(1) compared with the duration in origin, the growth duration of Japonica rice varieties which could normally mature Hunan became shorter by 15~45 d, their yield was 1. 43~9. 61 t/hm2 , in which varieties sown in early July showed an average yield of 7. 51 t/hm2 , shorter growth period, higher dry matter accumulation at maturity. (2) In varieties could become mature normally, the overall performance of late maturing varieties was best, their showed higher yield and quality, and the next was special early ones, early maturing ones and mid-early maturing ones. Seen from disaster relief and improvement of rice quality in Hunan, late maturing Japonica rice varieties from North-east China could be cultivated as late rice in Hunan, and their optimal sowing date was early July.%为了探讨洪涝灾害后晚稻救灾品种的生态适应性,从东北引进8个不同熟期粳稻品种在湖南开展了播种期试验。结果表明：(1)在湖南能正常成熟的东北粳稻品种,全生育期与原产地相比缩短了15~45 d,产量在1．43~9．61 t/hm2,其中7月上旬播种的品种,平均产量为7．51 t/hm2,生育期较短,成熟期干物质积累量大,均能安全齐穗。(2)3个播期能正常成熟的品种表现因类型而异,晚熟品种整体表现优于特早熟早粳、早熟早粳和中早熟早粳,主要是产量较高,稻米品质较优。从应急性避灾救灾和改善湖南稻米品质状况来看,可以利用东北晚熟粳稻品种作为湖南晚稻品种栽培,但是其播种期不宜太晚,最适宜播期为7月上旬。
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