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1988—1989年以籼粳杂种亚优2号为材料,以籼型杂种汕优63为对照,探讨了亚优2号高产的生理基础。与汕优63相比,亚优2号生物产量高13.0％,经济系数高6.4％。叶面积延续时间长25.5％,光合日积累量增加17.1％;茎鞘叶物质运转系数高1.5％;齐穗期以前群体相对生长速率和净同化率分别高8.3％和49.3％;最后三片叶功能期长8—19天。亚优2号生育前期株型较松散,后期较紧凑,群体受光姿态良好,产量比汕优63增加10—15％。
In 1988-1989, the indica hybrid rice “Youyou 2” was used as the material, and the indica hybrid “Shanyou 63” was used as the control to investigate the physiological basis of high yielding Yayou 2. Compared with Shanyou 63, Yayou 2 had a high biomass yield of 13.0% and a high economic coefficient of 6.4%. The leaf area duration was 25.5% longer and the photosynthetic daily accumulation was increased by 17.1%. The stems and leaves were 1.5% higher. The relative growth rate and net assimilation rate were 8.3% and 49.3% higher than those before heading stage respectively. The last three leaves Function of a long period of 8-19 days. Yayou No.2 had a loose plant type and a more compact late stage. The population received good light and the yield was increased by 10-15% compared with that of Shanyou 63.