| 小麦不同器官氮素累积分布动态规律的研究 |
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| 引用本文： | 侯有良,L.O′Brien,钟改荣.小麦不同器官氮素累积分布动态规律的研究[J].作物学报,2001,27(4):493-499. |
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| 作者姓名： | 侯有良 L.O′Brien 钟改荣 |
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| 作者单位： | 山西省农科院玉米研究所，山西忻州， 034000 |
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| 摘 要： | 在自然条件下，研究了4个小麦基因型各组织器官氮素的动态分布与累积变化。结果表明：基因型间在叶、茎、颖壳、叶鞘未包被的穗下节部分的氮素含量和籽粒蛋白质含量上存在着显著差异。叶片是前期组织氮素的重要贮存器官和籽粒灌浆中氮素的主要供给源。叶片组织氮素的含量在幼苗期最高，而叶氮总量的累积则在孕穗期最多。籽粒
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| 关 键 词： | 氮素累积分布 组织器官 小麦 基因型差异 籽粒蛋白质 |
| 收稿时间： | 1999-12-07 |
| 修稿时间： | 1999年12月7日 |
Study on the Dynamic Changes of the Distribution and Accumulation of Nitrogen in
Different Plant Parts of Wheat |
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| Hou Youliang,L.O′Brien,Zhong Gairong.Study on the Dynamic Changes of the Distribution and Accumulation of Nitrogen in
Different Plant Parts of Wheat[J].Acta Agronomica Sinica,2001,27(4):493-499. |
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| Authors: | Hou Youliang LO′Brien Zhong Gairong |
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| Abstract: | A field trial was conducted to examine the changes of the distribution and accumulation of nitrogen in various plant parts throughout the growing season. The results indicated that significant genotypic differences existed for the nitrogen content of leaf, stem, peduncle and chaff, as well as the protein content of developing grain. The leaf was the major storage organ for nitrogen and the source of nitrogen for grain filling. The nitrogen content of the leaf was the highest at the seedling stage, but the highest nitrogen accumulation occurred at the booting stage. Increase of the grain protein content and grain protein yield was usually accompanied by decrease of nitrogen levels of the various plant organs. Application of nitrogenous fertilizer could markedly increase the plant part nitrogen content and the grain protein content. It was found from the 5 samplings after the booting stage that, in most cases, the plant part nitrogen content was usually significantly positively correlated with grain protein content, indicating that selection for higher plant part nitrogen are helpful for the identification of genotypes with high grain protein content. |
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| Keywords: | Nitrogen distribution and accumulation Plant organs Wheat Genotype differences Grain protein |
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