| 不同氮肥水平下结实期灌溉方式对水稻弱势粒灌浆及产量的影响 |
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| 引用本文： | 朱宽宇,展明飞,陈静,王志琴,杨建昌,赵步洪. 不同氮肥水平下结实期灌溉方式对水稻弱势粒灌浆及产量的影响[J]. 中国水稻科学, 2018, 1(1): 155-168. DOI: 10.16819/j.1001-7216.2018.7060 |
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| 作者姓名： | 朱宽宇 展明飞 陈静 王志琴 杨建昌 赵步洪 |
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| 作者单位： | 1.扬州大学江苏省作物遗传生理重点实验室/粮食作物现代产业技术协同创新中心,江苏扬州,225009;2.江苏里下河地区农业科学研究所,江苏扬州 225009 |
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| 基金项目： | 国家863计划资助项目(2014AA10A605-4);国家自然科学基金资助项目(31471447, 31461143015,31471438);江苏省农业科技自主创新资金资助项目[CX(16)1001,CX(17)3042];江苏省自然科学基金资助项目(BK20131238);2015年江苏省水利科技项目(92) |
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| 摘 要： | 【目的】旨在阐明氮肥和灌溉方式对水稻产量、籽粒灌浆及生理特性的影响。
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| 关 键 词： | 水稻 产量 强势粒 弱势粒 互作 生理特性 |
| 收稿时间： | 2017-05-24 |
Effects of Irrigation Regimes DuringGrain Filling Under Different Nitrogen Rates on Inferior SpikeletsGrain-Filling and Grain Yield of Rice |
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| Kuanyu ZHU,Mingfei ZHAN,CHENJing,Zhiqin WANG,Jianchang YANG,Buhong ZHAO. Effects of Irrigation Regimes DuringGrain Filling Under Different Nitrogen Rates on Inferior SpikeletsGrain-Filling and Grain Yield of Rice[J]. Chinese Journal of Rice Science, 2018, 1(1): 155-168. DOI: 10.16819/j.1001-7216.2018.7060 |
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| Authors: | Kuanyu ZHU Mingfei ZHAN CHENJing Zhiqin WANG Jianchang YANG Buhong ZHAO |
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| Affiliation: | 1.Key Laboratory of Crop Genetics and Physiology of Jiangsu Province / Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China;2.Lixiahe Region Agricultural Research Institute of Jiangsu, Yangzhou225009, China |
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| Abstract: | 【Objective】 To investigate the effects of water and nitrogen application on yield and grain filling,【Method】 an indica/japonica hybrid Yongyou 2640 with large-panicle and a japonica inbred Huaidao 5 with mid-panicle were grown in pots. After field seedling nursing then transplanting to pots, we designed three N rates, namely 0N (0 g N/pot), medium N level(MN, 2 g N/pot), and high N level(HN, 4 g N/pot), and three irrigation regimes post-anthesis consisting of conventional irrigation (CI, soil water potential was kept at 0 kPa), alternate wetting and moderate drying irrigation (WMD, rewatered when soil water potential reached -15 kPa), and alternate wetting and severe drying irrigation (WSD, rewatered when soil water potential reached -30 kPa). 【Result】 In the CI regime, MN showed the highest grain yield; in the WMD regimes, however, there was no significant difference in grain yield between MN and HN. Furthermore, in the WSD regime, grain yield under HN was the highest. In terms of grain filling, the superior spikelets present no significant difference in grain filling rate and final grain weight compared with all water-nitrogen treatments; Inferior spikeletsperforms better in grain filling rate and final grain weight at 0N and MN under CI and WMD regimes. However, in the WSD regime, 0N led to the lowest while HN showed the highest grain filling and final grain weight, but not significantly differentto MN. The above results showed that there was an obvious interaction between water and nitrogen. Among the varieties, grain filling rate and grain weight of inferior spikeletsof indica/japonica hybrid Yongyou 2640were lower than that ofjaponica inbred Huaidao 5, and the advantage of grain yield ofYongyou 2640 stemed from higher spikelet number per panicle. Finally, in the WMD+MN treatment, there was a higher nitrogen efficiency, creating higher grain yield with less nitrogen, and achieving the purpose of water and nitrogen saving. Secondly, it also eahanced the activity of root and leaves, improving the non-structural carbohydrate(NSC) remobilization, which promoted the upground biomass development and dry matter translocation in order to strengthen the inferior spikelets filling to induce an increase in grain yield. Therefore, it turns out to be the best water-nitrogen management in this research. |
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| Keywords: | rice yield superior spikelets inferior spikelets interaction physiological traits |
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