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首页> 外文期刊>日本作物學會紀事 >Studies on the Photosynthesis and Dry Matter Production of Rice Plants : I. Varietal differences in photosynthetic activity induced by nitrogen top-dressing
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Studies on the Photosynthesis and Dry Matter Production of Rice Plants : I. Varietal differences in photosynthetic activity induced by nitrogen top-dressing

机译：水稻植物光合作用和干物质产量研究：I。氮顶敷料诱导光合活性的变异差异

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摘要

An investigation was made concerning the influence of nitrogen top-dressing at a later stage of growth on the leaf photosynthetic activity in some newly improved rice varieties of Korea obtained by indica-japonica crossing. The results are as follows: 1. Considerable varietal differences were observed in the apparent photosynthetic activity on leaf area basis determined by oxygen evolution. The Milyang lineage and the Iri lineage showed the highest activity, the other varieties being in the order of Suweon lineage, the japonica (Somewake), and the indica (T-136). The early-maturing varieties showed a tendency to have somewhat higher photosynthetic activity than the later-maturing varieties. 2. Nitrogen content on leaf area basis was lower in the indica-japonica hybrid varieties than in the japonica variety. 3. The nitrogen top-dressing promoted photosynthetic activity in all the varieties, but the degree of response differed from variety to variety. 4. Photosynthetic activity on leaf nitrogen basis also showed varietal differences, regardless of the nitrogen top-dressing. 5. Furthermore, the photosynthesis-promoting effect of increased leaf nitrogen content duc to top-dressing was generally higher in the indica-japonica hybrid varieties than in the Japonica or the indica. 6. By nitrogen top-dressing both NAR and leaf area development were enhanced, leading to increased CGR. This trend was especially clear in the indica-japonica hybrid varicties.
机译：关于籼粳横梁叶片叶片光合活性较晚增长的氮顶敷阶段的影响，提出了调查。结果如下：1。通过氧气进化确定的叶面积基础的表观光合作用活动中观察到了相当大的差异。 Milyang谱系和IRI谱系表现出最高的活动，其他品种是苏海谱系的顺序，粳稻（Somewake）和籼稻（T-136）。早熟的品种表明，比后来成熟的品种更高的光合作用活动趋势。 2.叶片面积的氮含量在籼粳杂交品种中较低，而不是粳稻品种。 3.氮顶级敷料在所有品种中促进了光合活性，但反应程度不同于各种品种。 4.叶片氮的光合活性也表现出变种差异，无论氮顶敷。此外，籼粳杂交品种的增加的氮氮含量Duc至籽粒剂的光合作用促进效果通常比在粳稻或籼稻中的籼稻杂交品种更高。 6.通过氮顶敷，增强了NAR和叶面积的开发，导致CGR增加。在籼粳杂交变化中，这种趋势特别清楚。

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