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1998和 1 999年以两系法亚种间杂交稻两优培九为材料 ,以三系法品种间杂交籼稻汕优 63为对照 ,探讨了两优培九的高产生理基础。与汕优 63相比 ,两优培九生物学产量高 1 2 .1 % ,经济系数高 1 2 .5 %。生物学产量高是因为叶面积延续时间长 1 7.1 %和较高的光合速率 ;经济系数高是由于茎鞘叶物质转运系数高和齐穗期以前群体相对生长速率及净同化率较高。两优培九生育前期株型较松散 ,后期较紧凑 ,群体受光姿态良好。
In 1998 and1999, two-line sub-subspecific hybrid rice “Liangyoupeijiu” was used as material, and the cross between indica hybrid rice Shanyou 63 was used as control to explore the high-yielding physiological basis of Liangyoupeijiu. Compared with Shanyou 63, the yield of Liangyoupeijiu was 12.1% higher than that of Shanyou 63, and the economic coefficient was 12.5% higher. The high biological yield is due to the prolonged leaf area duration of 7.11% and higher photosynthetic rate. The high economic coefficient is due to the high translocation coefficient of stem and sheath leaves and the relative growth rate and net assimilation rate before heading stage. Liangyoupeijiu early plant type loose, later more compact, good light group attitude.