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探讨不同施氮水平对超级稻源库特性的影响。以超级杂交稻Q优6号和金优527为材料,设计不同施氮水平田间试验进行研究。结果表明,随着施氮量的增加,作物群体生长率、最大叶面积指数、有效叶面积指数和高效叶面积指数、叶面积比率、光合势、拔节期-孕穗期叶源总量值均逐渐增加,而有效叶面积率、高效叶面积率、净同化率、孕穗期单茎茎鞘重逐渐降低随氮肥的增加而减少。在施氮量0～315kg/hm2的范围内,随着施氮量的增加,总颖花数、总库容量逐渐增大,而饱粒千粒重、颖花数/叶、实粒数/叶、粒重/叶逐渐降低。颖花数/叶、实粒数/叶和粒重/叶均与饱粒千粒重、结实率达显著的正相关,总库容量与总颖花数呈极显著正相关。
Effects of different nitrogen application rates on characteristics of source sinks of super rice. The super hybrid rice Qyou 6 and Jinyou 527 were used as materials to design field experiments with different nitrogen levels. The results showed that with the increase of nitrogen application rate, the growth of crop population, the maximum leaf area index, effective leaf area index and high leaf area index, leaf area ratio, photosynthetic potential and total leaf area at jointing and booting stage gradually increased Increased, and the effective leaf area ratio, high leaf area efficiency, net assimilation rate, booting stems sheath weight decreased gradually with increasing nitrogen fertilizer. In the range of 0 ~ 315 kg / hm2 of nitrogen application, with the increase of nitrogen application, the total number of spikelets and the total pool capacity increased gradually. However, the grain weight per spike, spikelets / leaf, Grain weight / leaf gradually decreased. The number of spikelet, leaf number, leaf number, leaf weight and leaf weight were positively correlated with the grain weight per 1000 kernel weight and seed setting rate, and the total volume was significantly and positively correlated with the total spikelet number.