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为研究超级杂交稻两优培九在湖南制种产量低而不稳的问题 ,1999年国家杂交水稻工程技术研究中心开始组织协作攻关。选择高、中、低海拔 3个试验点 ,重点研究花期日均温对异交结实率的影响及 93 11高产群体的培育技术。经过两年 3点的研究 ,确定了 2 5～ 2 7℃是适宜花期日均温条件 ,探索出了父本移栽后 4～ 6d、幼穗分化Ⅱ期追施氮肥 ,一期或两期父本 ,行比为 2∶14的 93 11高产群体培育技术
In order to study the problem of low and unstable yield of super hybrid rice Liangyou Peijiu in Hunan, 1999 National Hybrid Rice Engineering and Technology Research Center began to organize collaborative research. Three high, middle and low elevations were chosen to study the effect of daily average temperature on the rate of outcrossing and the cultivation techniques of 9311 high yield population. After 2 years of study at 3 o’clock, it was confirmed that 25 ~ 27 ℃ was the optimum daily average temperature for flowering, and 4 to 6 days after transplanting of male parent were explored. Male parent, line ratio of 2:14 93 11 high-yielding population cultivation techniques