贵州省杂稻区试对照种生育期分析及参试组合熟期类型划分指标探讨

Growth Period Analysis and Mature Type Classification for Guizhou Hybrid Rice Varieties in Regional Test

分析了贵州省杂交稻区试对照威优 6 4、汕优 6 4、汕优晚 3和汕优 6 3的生育期。结果表明 :杂交水稻组合对照种生育期与海拔高度呈正相关 ,海拔每上升 10 0 m,生育期约延长 2～ 3d;威优 6 4、汕优 6 4和汕优晚 3的生育期比迟熟对照汕优 6 3分别早熟 13.1、6 .6和 5 .9d;在 5个相同试点 ,比汕优 6 3分别早熟 18.1、14 .1和 11.4 d,结合误差确定威优 6 4比汕优 6 3早熟 19.4 d。由此提出了参试组合熟期类型划分指标 ,经检验证明适用。

In regional test of hybrid rice combination, the growth period of the check varieties Weiyou 64, Shanyou 64, Shanyou wan 3 and Shanyou 63 are analysed. Hybrid rice check's growth period is positively correlated to the elevation. Every 100 m raised, the growth period lengthen 2~3 days; Weiyou 64, Shanyou 64 and Shanyou wan 3 matured earlier 18.1, 14.1, and 11.4 days than Shanyou 63 Separately. Excluding the permitled error, Weiyou 64 is earlier 19.4 days than Shanyou 63.Based on this result, the index for classifying the mature type of the tested varieties is provided and proved to be adaptable for practice.