| 不同年代中籼水稻品种的产量与氮肥利用效率 |
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| 引用本文： | 剧成欣,陶进,钱希旸,顾骏飞,赵步洪,杨凯鹏,王志琴,杨建昌.不同年代中籼水稻品种的产量与氮肥利用效率[J].作物学报,2015,41(3):422-431. |
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| 作者姓名： | 剧成欣 陶进 钱希旸 顾骏飞 赵步洪 杨凯鹏 王志琴 杨建昌 |
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| 作者单位： | 1扬州大学江苏省作物遗传生理国家重点实验室培育点/粮食作物现代产业技术协同创新中心，江苏扬州225009；2江苏省里下河地区农业科学研究所，江苏扬州225007；3江苏省东海县农业委员会，江苏连云港 222300 |
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| 基金项目： | 本研究由国家自然科学基金项目(31271641, 31471438)，中央级科研院所基本科研业务费专项(农业)(201103003, 201203079), 国家“十二五”科技计划项目(2014AA10A605, 2011BAD16B14, 2012BAD04B08, 2013BAD07B09)，江苏省农业三新工程项目(SXGC[2014]313)和江苏高校优势学科建设工程资助项目(PAPD)专项经费资助。 |
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| 摘 要： | 本研究旨在探明中籼水稻在品种改良过程中产量与氮肥利用效率的变化特点。以江苏省近70年来不同年代在生产上广泛应用的12个代表性中籼水稻品种(含杂交稻组合)为材料,依据应用年代将其分为20世纪40—50年代、60—70年代、80—90年代和2000年以后4个类型,设置0 N(全生育期不施氮)、MN(全生育期施氮210 kg hm–2)和HN(全生育期施氮300 kg hm–2)3个施氮量处理,研究其产量、氮肥利用效率及其生理特性。结果表明,随品种应用年代的演进,不同年代中籼水稻品种的产量和氮肥利用效率均获得较大提高。2000年以后的品种(超级稻)产量和氮肥利用效率较高,根系性状和叶片光合特性以及氮代谢相关酶活性强是其重要生理基础。超级稻抽穗后根系氧化力和剑叶光合速率下降的幅度较大可能是导致超级稻结实率较低的一个重要原因。提高灌浆中后期超级稻的根系氧化力和剑叶光合速率,有望提高超级稻的结实率。
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| 关 键 词： | 中籼水稻 氮肥利用效率 产量 |
| 收稿时间： | 2014-09-04 |
Grain Yield and Nitrogen Use Efficiency of Mid-season Indica Rice Cultivars Applied at Different Decades |
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| JI Cheng-Xin,TAO Jin,QIAN Xi-Yang,GU Jun-Fei,ZHAO Bu-Hong,YANG Kai-Peng,WANG Zhi-Qin,YANG Jian-Chang.Grain Yield and Nitrogen Use Efficiency of Mid-season Indica Rice Cultivars Applied at Different Decades[J].Acta Agronomica Sinica,2015,41(3):422-431. |
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| Authors: | JI Cheng-Xin TAO Jin QIAN Xi-Yang GU Jun-Fei ZHAO Bu-Hong YANG Kai-Peng WANG Zhi-Qin YANG Jian-Chang |
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| Institution: | 1.Jiangsu Key Laboratory of Crop Genetics and Physiology / Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China;2.Lixiahe Region Agricultural Research Institute of Jiangsu, Yangzhou 225007, China;3.Donghai Prefectural Agriculture Committee of Jiangsu, Lianyungang 222300, China |
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| Abstract: | Improvement in rice cultivars plays an important role in increasing grain yield. However, little is known about the relationship between yield and nitrogen use efficiency in mid-season indica rice cultivar improvement process. In this study, 12 typical cultivars (including hybrid combinations) applied in the production in Jiangsu Province during the last 70 years were used, and classified into four types of 1940–1950s, 1960–1970s, 1980–1990s, and after 2000 (super rice) according to their application times. Three treatments of zero N (0N), 210 kg ha-1 N (MN) and 300 kg ha-1 N (HN) were designed. The results showed that grain yield and nitrogen use efficiency were progressively increased with the improvement of cultivars under each nitrogen rate. The super rice cultivars had a higher biomass and nitrogen accumulation, higher activities of root oxidation and nitrogen metabolic enzyme and higher leaf photosynthetic rate resulting in higher grain yield and nitrogen use efficiency when compared with any other types of cultivars. The root oxidation activity and photosynthetic characteristics of super rice were the peak at the heading stage, but sharp declined from heading to maturity, which could account for an important physiological reason for a lower filled-grain percentage of super rice. It would be an important approach to further increase grain yield of super rice through increasing root activity and leaf photosynthetic rate during grain filling. |
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| Keywords: | Middle-season indica rice Nitrogen use efficiency Grain yield |
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