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以F优498为材料,设置淹灌和控制性间歇灌溉方式以及5种施氮水平共10个处理,研究其对水稻产量及水、氮利用效率的影响。结果表明,合理的水氮管理模式能够提高水稻产量及水、氮利用效率。控制性间歇灌溉模式较淹灌模式产量平均提高3.22%,其增产原因是每穗总粒数、结实率、千粒重均有一定程度的提高;淹灌模式能够获得较多的有效穗数,从而保证产量不显著降低。与淹灌模式相比,控制性间歇灌溉模式能增加水稻生育后期的氮素积累,促进茎鞘氮素转运,提高氮素利用效率,提高水分生产效率和灌溉水生产力。综合产量与水、氮利用效率,淹灌模式下施氮量180 kg/hm~2表现较好,控制性间歇灌溉模式下施氮量135 kg/hm~2节水节肥效果较明显。
F You 498 was used as material to establish flooding irrigation and controlled intermittent irrigation and five nitrogen fertilization treatments in total of 10 treatments to study its effects on rice yield and water and nitrogen use efficiency. The results show that reasonable water and nitrogen management mode can improve rice yield, water and nitrogen use efficiency. Compared with the control, the intermittent irrigation mode increased the yield by 3.22% on average, the reason was that the total grain number per panicle, the seed setting rate and the 1000-grain weight increased to a certain degree; the flooding irrigation mode could obtain more effective panicles, Yields did not decrease significantly. Compared with the submerged irrigation mode, the controlled intermittent irrigation mode can increase the nitrogen accumulation in the late rice growth stage, promote the nitrogen and nitrogen transport in the stem and sheath, increase the nitrogen utilization efficiency, and improve the water production efficiency and irrigation water productivity. The comprehensive yield, water and nitrogen use efficiency, nitrogen application rate of 180 kg / hm ~ 2 under flooded irrigation was better than that under controlled intermittent irrigation, and the effect of water saving and fertilizer saving was obvious at nitrogen rate of 135 kg / hm ~ 2.