不同播期对晚稻品种岳优9113和岳优360生长发育及产量的影响

岳优9113和岳优360系湖南省岳阳市农科所育成的晚稻新组合,为探索其在桂林市的生态适应性及趋利避冷害措施,以金优207为对照,进行不同播种期对水稻品种生长发育及产量的影响试验。结果表明,岳优9113、岳优360、金优207（CK）3个品种的全生育期均随着播期提早而延长;稳产性以金优207最好,岳优360次之;丰产性岳优9113与金优207相当;抗寒性以金优207最好,其次是岳优360,岳优9113最弱;岳优9113、岳优360在桂林市最适宜的播种期为6月25日～7月5日。

Effects of different sowing dates on growth and yield of late rice varieties Yueyou 9113 and Yueyou 360

Yueyou 9113 and Yueyou 360 are new late rice varieties bred by Yueyang Institute of Agricultural Sci-ences,Hunan.The present experiment has been conducted to study the effects of different sowing dates on growth and yield of these two late rice varieties in order to explore their ecological adaptability in Guilin and to study the control mea-sures for avoiding cold.Variety Jinyou 207 was used as the control.The results showed that the whole growth period of three varieties was postponed with the sowing date delay.The yield stability and cold resistance of Jinyou 207（CK） was found to be the best followed by the variety Yueyou 360.Both Yueyou 9113 and Jinyou 207 showed similar yields.The suitable dates for sowing Yueyou 9113 and Yueyou 360 varieties were between 25th June and 5th July.