Ⅱ优沈98分期播种试验小结

Study on Different Sowing Yimes of Ⅱ You Shen 98

以Ⅱ优沈98为材料进行分期播种试验。结果表明,随着播种期推迟(每期间隔10 d),全生育期明显缩短,中稻每期缩短5 d左右,连晚每期缩短3 d左右;中稻不同播种期的产量及经济性状的影响差异不显著,连作晚稻随播种期的推迟,产量呈递减趋势,达极显著水平。温光反应特性与对照汕优63基本相同。

Different sowing times of a hybrid rice combination Ⅱ You Shen 98 was conducted. The results showed that the whole growth stage was significantly shorter with delayed sowing time （each interval of 10d）. Mid-season rice and continuous late rice were shortened about 5d and 3d each period,respectively. They were no significant difference of yield and economic traits for mid-season rice under different sowing times. The yield had a decrease under delayed sowing times and reached a significant level. Its characteristics of temperature and light reaction was basically the same as control variety Shanyou 63.