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在总施尿素量600 kg/hm2条件下,研究了氮肥运筹方式对超级稻扬两优6号及新两优6号茎蘖动态、后期光合性能及产量的影响。结果表明,与全部作基肥相比,重施分蘖肥(基肥、分蘖肥各占50%)使分蘖期延长,无效分蘖增加,每穗粒数及粒重下降,产量降低;适当减少分蘖肥、增加穂粒肥,使分蘖期缩短,无效分蘖减少,后期光合性能提高,每穗粒数、粒重增加,产量提高。其中,以基肥、分蘖肥、促花肥、保花肥、粒肥用量比为1∶1∶0∶0∶0的处理产量最低,较对照(全部作基肥)分别减产7.69%和6.32%,基肥、分蘖肥、促花肥、保花肥、粒肥用量比为3∶1∶1∶1∶0的处理产量最高,较对照分别增产22.86%和27.15%。
Under the condition of a total amount of 600 kg / hm2 of urea, the effects of nitrogenous fertilizer on the tillering dynamics, later photosynthesis and yield of super hybrid rice combination Yangliangyou 6 and Xinliangyou 6 were studied. The results showed that tillering stage (50% of basal and tillering fertilizers respectively) increased the tillering stage, the increase of ineffective tillers, the decrease of grain number and grain weight per panicle, Increased granular fertilizer, so that the tillering stage shortened, ineffective tiller reduction, late photosynthetic performance, grain number per spike, grain weight, yield increased. Among them, the basal fertilizer, tillering fertilizer, flower and fertilizer, flower and fertilizer, granule fertilizer ratio of 1: 1: 0: 0: 0 treatment lowest, compared with the control (all as a base fertilizer), respectively, yield 7.69% and 6.32% Fertilizer, fertilizer, flower fertilizer, fertilizer ratio of 3:1:1:1:1 the highest yield, respectively, compared with the control yield 22.86% and 27.15%.