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用作物群体物质生产研究法对粳型杂交稻“榆杂29”超高产的光合生产进行研究,结果表明:粳型杂交稻产量15t/hm ̄2的群体生产率(CGR)19.7~25.3g/m ̄2·d.CGR变化在同一地区呈相同变化趋势,不同海拔地点的CGR存在差异。超高产的CGR变化特点是齐穗后10天至成熟出现第二个峰值(24.5~42.7g/m ̄2·d);孕穗期叶面积指数(LAI)达最大值9.26~9.58,抽穗后20天仍保持较高值的LA15.99~7.43.本田期平均净同化率(NAR)333~4.8Ig/m ̄2·d,提高本田期两头的NAR是粳型杂交稻超高产的关键。超高产与组合的不落粒性、灌浆期长、穗大有关。超高产的技术路线有两种,构成产量的光合产物形成有区别。
The research on photosynthetic production of japonica hybrid rice “Yu-han 29” with high yield was conducted by crop population production research method. The results showed that the population productivity (CGR) of 15t / hm ~ 2 for japonica hybrid rice was 19.7-25. 3g / m ~ 2 · d. CGR changes in the same area showed the same trend, CGR differences at different altitudes. The characteristics of super high yielding CGR were the second peak (24.5 ~ 42.7g / m ~ 2 · d) from 10 days after heading to maturity, the highest LAI (leaf area index) at booting stage was 9.26 ~ 9.58, and LA15.99 ~ 7.43 remained high after 20 days of heading. Honda average net assimilation rate (NAR) 333 ~ 4.8Ig / m ~ 2 · d, to improve the Honda two NAR is the key to the high yield of japonica hybrid rice. Super high yield and combination of non-droplet, grain filling period, spike large. There are two technical routes for super-high-yielding, which make up the difference between the photosynthetic products that make up the yield.