| 穗肥施用时期对优质稻产量、氮素积累及品质的影响 |
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| 引用本文： | 吴嘉乐,戚文乐,武晶晶,阙仁伟,曾勇军,潘晓华,谢小兵.穗肥施用时期对优质稻产量、氮素积累及品质的影响[J].核农学报,2023,37(2):362-369. |
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| 作者姓名： | 吴嘉乐 戚文乐 武晶晶 阙仁伟 曾勇军 潘晓华 谢小兵 |
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| 作者单位： | 作物生理生态与遗传育种教育部重点实验室/江西农业大学，江西 南昌 330045 |
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| 基金项目： | 江西省教育厅科学技术研究项目(GJJ190170);江西省水稻产业技术体系专项(JXARS-04) |
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| 摘 要： | 为了探明优质晚籼稻(Oryza sativa L. subsp. xian)产量和品质协同提升的适宜的穗肥施用时期，采用大田微区15N示踪技术，以优质晚籼稻Y两优911和野香优莉丝为材料，设置3个穗肥施用时期(D1：倒4叶期施肥；D2：倒3叶期施肥；D3：倒2叶期施肥)，研究穗肥施用时期对优质稻产量、籽粒氮素积累及食味品质的影响。结果表明，随着穗肥施用时期的推迟，两个优质晚籼稻品种的产量先升高后降低，在D2达到最高产量，较D1、D3显著增产4.30%～6.39%；籽粒总氮积累量、15N标记肥料氮素积累量及其占比、15N标记肥料氮素回收利用率、15N标记肥料氮素收获指数表现为增加趋势，D2和D3较D1显著增加19.16%～21.26%、32.54%～50.75%、0.91～2.49、12.42～23.34和...
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| 关 键 词： | 优质稻 穗肥施用时期 产量 氮肥利用率 稻米品质 |
| 收稿时间： | 2022-07-29 |
Effects of Panicle Fertilizer Application Periods on Yield,Nitrogen Accumulation and Quality in High-quality Rice |
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| WU Jiale,QI Wenle,WU Jingjing,QUE Renwei,ZENG Yongjun,PAN Xiaohua,XIE Xiaobing.Effects of Panicle Fertilizer Application Periods on Yield,Nitrogen Accumulation and Quality in High-quality Rice[J].Acta Agriculturae Nucleatae Sinica,2023,37(2):362-369. |
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| Authors: | WU Jiale QI Wenle WU Jingjing QUE Renwei ZENG Yongjun PAN Xiaohua XIE Xiaobing |
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| Institution: | Key Laboratory of Crop Physiology，Ecology and Genetic Breeding，Ministry of Education/Jiangxi Agricultural University，Nanchang，Jiangxi 330045 |
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| Abstract: | To improve grain yield and quality simultaneously， this study aimed to find the best timing for panicle fertilizer application of high-quality late indica rice （Oryza sativa L.subsp. xian）. Three panicle developmental stages （D1： elongation phase of the fourth leaf from the last； D2： elongation phase of the third leaf from the last； D3： elongation phase of the penultimate leaf） were chosen to understand the effects of fertilization timing on yield， nitrogen accumulation and eating quality. The 15N tracing technique was used in field micro-plot experiments with two rice varieties （YLY911 and YXYLS）. The grain yield of both varieties increased at first and then decreased during the sequential panicle fertilizer applications and D2 fertilization produced the highest yield with a significant increase of 4.30%~6.39% compared to D1 and D3. Total grain nitrogen accumulation， and 15N labeled fertilizer nitrogen accumulation and its ratio to total grain nitrogen accumulation， 15N labeled fertilizer nitrogen recovery rate， and nitrogen harvest index of 15N labeled fertilizer showed an increasing trend towards the late fertilization. In comparison to D1， significant increases of 19.16%~21.26%， 32.54%~50.75%， 0.91~2.49， 12.42~23.34 and 5.18~8.31 percentage points were observed for these parameters in D2 and D3. There was no significant difference between D2 and D3 in YXYLS. The grain protein content and setback value increased， while the gel consistency， peak viscosity and breakdown value decreased as the panicle fertilization delays and therefore eating quality was reduced， but the breakdown and setback values were not different between D1 and D2 in YXYLS. Moreover， the yield， grain nitrogen accumulation， 15N labeled fertilizer nitrogen recovery rate， and nitrogen harvest index of 15N labeled fertilizer of YLY911 were significantly higher than those of YXYLS. The response of YLY911 to late panicle fertilization was greater than YXYLS. In conclusion， applying panicle fertilizer at D2 stage could synergistically achieve higher yield， better quality and higher nitrogen use efficiency in high-quality late indica rice. The results of this study provide a theoretical basis for optimizing the application period of panicle fertilizer of high-quality late indica rice. |
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| Keywords: | high-quality rice panicle fertilizer application period yield nitrogen use efficiency rice quality |
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