| 氧肥后移对超高产小麦产量及生理特性的影响 |
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| 引用本文： | 王晨阳,朱云集.氧肥后移对超高产小麦产量及生理特性的影响[J].作物学报,1998,24(6):978-983. |
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| 作者姓名： | 王晨阳 朱云集 |
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| 作者单位： | 国家小麦工程技术研究中心，河南郑州，450002 |
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| 摘 要： | 在小麦超高产栽培条件下，研究了氮肥不同追施时期追施量对籽粒产量及植株生理特性的影响。结果表明，超高产小麦施氮量以２４０ｋｇ／ｈｍ＾２，基追比例５：５为宜，追氮量过少或过多均不利于进一步提高小麦产量。氮肥不同追施时期对小麦产量也有不同的影响，小花雌雄蕊分化期和药隔形成期追肥可明显改善植株后期光合性能，降低叶片气孔阻力，并使植株体内保持高水平的保护酶活性，降低后期细胞膜脂过氧化水平，延缓植株衰老，从而
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| 关 键 词： | 小麦 氮肥后移 籽粒产量 生理特性 |
| 收稿时间： | 1998-07-10 |
| 修稿时间： | 1999-03-02 |
Effects Application of Nitrogen at the Later Stage on Grain Yield and Plant Physiological Characteristics of Super-High-Yielding Winter Wheat |
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| Wang Chenyang Zhu Yunji Xia Guojun Song Jiayong Li Jiuxing Wang Yonghua Lo Yi.Effects Application of Nitrogen at the Later Stage on Grain Yield and Plant Physiological Characteristics of Super-High-Yielding Winter Wheat[J].Acta Agronomica Sinica,1998,24(6):978-983. |
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| Authors: | Wang Chenyang Zhu Yunji Xia Guojun Song Jiayong Li Jiuxing Wang Yonghua Lo Yi |
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| Affiliation: | National Engineering Research Center for Wheat, Zhengzhou,450002 |
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| Abstract: | Effects of different nitrogen application on yield and plant physiological charac
teristics of winter wheat were studied under the super-high-yielding conditions. The results indi
cated that the application rate, 240 kg/ha, with base fertilization 50% and application 50% at
jointing stage, was suitable for getting super-high grain yield. Too much or too little application
of nitrogen might be unsuitable for making further improvement on wheat yield. Different effects
on wheat yield and plant physiological characteristics were also obtained among different nitrogen
application stages. Nitrogen application at stages of pistil-stamen formation and tetrad formation
markedly increased photosynthetic ability and activities of SOD and POD of plant leaves, and also
decreased stomatal resistance and membrane peroxidation level in later period of plant senescence,
thus promoted grain filling and increased grain yield significantly. |
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| Keywords: | Super-high-yielding wheat Application of nitrogen at the later stage: Grain yield Physiological characteristics |
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