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为研究不同氮肥运筹对超级杂交晚稻五丰优T025养分吸收、转运、分配及产量的影响,并探讨各养分及其与产量的相互关系,开展了本试验。结果表明,在不同氮肥运筹条件下,水稻各生育期氮、磷、钾的吸收、转运均存在明显的协同效应,且合理的氮肥运筹能促进各养分的吸收及转运。在本试验条件下,随分蘖肥比例的提高,孕穗期至成熟期水稻叶片及茎鞘各养分转运总量和穗部来源于叶片及茎鞘各养分转运的贡献率均有增大的趋势。孕穗期至成熟期叶片和茎鞘氮、磷、钾养分转运量最高分别达17.1%、21.2%、14.8%。在纯氮用量为195 kg/hm2时,基肥、蘖肥、穗肥最佳施肥比例为5∶2∶3。
In order to study the effects of different N application strategies on nutrient uptake, translocation, distribution and yield of super hybrid late rice N5Feng T025, and to explore the relationship between nutrients and their yield, this experiment was carried out. The results showed that there were obvious synergistic effects on the absorption and translocation of nitrogen, phosphorus and potassium in different growth stages of rice under different nitrogen application conditions. The rational nitrogen fertilizer application could promote the absorption and transport of nutrients. Under the conditions of this experiment, with the increase of the ratio of tillering fertilizers, the total amount of nutrient transport in the leaves and stems of rice and the contribution rate of nutrients from the leaves and stems sheaths in the booting stage to maturity increased. The highest N, P, and K nutrient transport rates from booting stage to mature stage were 17.1%, 21.2% and 14.8% respectively. When the amount of pure nitrogen was 195 kg / hm2, the best proportion of basal fertilizer, tillering fertilizer and spike fertilizer was 5: 2: 3.