| 春小麦品种氮的吸收积累和转运特征及与籽粒蛋白质的关系 |
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| 引用本文： | 张庆江,张立言.春小麦品种氮的吸收积累和转运特征及与籽粒蛋白质的关系[J].作物学报,1997,23(6):712-718. |
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| 作者姓名： | 张庆江 张立言 |
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| 作者单位： | 河北省农科院粮油作物研究所，河北石家庄，050031 |
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| 摘 要： | 春小麦个体发育的各个时期，不同器官全Ｎ含量均存在着差异，表现为叶片〉叶鞘〉茎杆。叶片、叶鞘、茎杆和籽粒Ｎ积累峰值依次出现有孕穗期、抽穗期、开花盛期和乳熟末期。开花前Ｎ素主要积累在叶片中，生育后期籽粒成为Ｎ素的主要贮存场所。籽粒Ｎ主要来自开花前营养器官贮存Ｎ的再分配，再分配Ｎ占籽粒Ｎ的５３．０％－８０．８％，各营养器官贮存Ｎ对籽粒Ｎ贡献的大小是叶片〉茎杆〉叶鞘。在籽粒灌浆过程中，籽粒Ｎ素含量的变化曲
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| 关 键 词： | 春小麦 氮素 积累分配 蛋白质含量 |
| 收稿时间： | 1995-07-07 |
| 修稿时间： | 1996-09-11 |
The Absorption, Accumulation and Translocation of Nitrogen and Their Relationships to Grain Protein Content in Spring Wheat Variety |
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| Zhang Qingjiang,Zhang Liyan,Bi Huanwu.The Absorption, Accumulation and Translocation of Nitrogen and Their Relationships to Grain Protein Content in Spring Wheat Variety[J].Acta Agronomica Sinica,1997,23(6):712-718. |
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| Authors: | Zhang Qingjiang Zhang Liyan Bi Huanwu |
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| Institution: | Cereal and Oil Crops Institute, Hebei Academy of Agricultural and Forestry Science, Shijiazhuang,050031 |
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| Abstract: | There were differences in the total N content of different vegetative organs at different stages of individual development in spring wheat. The total N content in the leaf blade was higher than that in the leaf sheath and the stem. The peak values of the N accumulation in the leaf blade, leaf sheath, stem and grain appeared successively at the booting stage, heading stage, full anthesis and late milky stage. N was mainly accumulated in the leaves before anthesis, and in the grains after that. About 53. 0%-80. 8% of the N in the grains come mainly from redistribution of the N accumulated in different vegetative organs before anthesis. The order of their contribution to the grain N is leaf blade>stem>leaf sheath. The total N content in the grains was higher initially, then it decreased, and increased again until maturity. But a "S" curve of grain-N accumulation was observed. The grain protein content was significantly positively correlated to the total N content accumulated in single plants and different vegetative organs at different growth stages. But there were little positive correlations between the grain protein content and the N accumulation, N-translocation rate or N-harvest index. Both the grain yield and the protein content were affected by the application levels of N fertilizer. The optimum rates of N fertilizer application for maximum grain yield and protein content were different for different cul-tivars. |
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| Keywords: | Spring wheat Accumulation and translocation of N Grain protein content |
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