| 亚种间杂交稻光合特性及物质积累与运转的研究 |
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| 引用本文： | 杨建昌,朱庆森.亚种间杂交稻光合特性及物质积累与运转的研究[J].作物学报,1997,23(1):82-88. |
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| 作者姓名： | 杨建昌 朱庆森 |
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| 作者单位： | 扬州大学农学院农学系,江苏扬州,225009 |
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| 基金项目： | “863”计划101-01-03课题 |
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| 摘 要： | 亚种间杂交稻穗大粒多，增产潜力大，同亚种内品种间杂交稻相比，亚种间杂交稻剑叶的气孔密度和气孔导度大，抽穗以后叶片的光合速度高。在抽穗期，亚种间杂 亚种内杂种的干物质积累量相关很小，叶和叶鞘中储存的可生碳水化合物以及干重颖花比前者则小于后者。抽穗至成熟，亚种间杂种的干物质积累量和干重颖花比明显刘于亚种内杂处，但前者的物质运转率、茎鞘物质的输出率和转换率均低于后者。对亚种间杂种物质运输率的原因进行了计
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| 关 键 词： | 亚种间杂种 光合特性 物质积累 运转率 杂交水稻 |
| 收稿时间： | 1995-06-12 |
| 修稿时间： | 1996-04-22 |
Photosynthetic Characteristics, Dry Matter Accumulation and Its Translocation in Intersubspecific Hybrid Rice |
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| Yang Jianchang,Zhu Qingsen,Wang Zhiqin,Lang Youzhong.Photosynthetic Characteristics, Dry Matter Accumulation and Its Translocation in Intersubspecific Hybrid Rice[J].Acta Agronomica Sinica,1997,23(1):82-88. |
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| Authors: | Yang Jianchang Zhu Qingsen Wang Zhiqin Lang Youzhong |
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| Affiliation: | Agronomy Dept., College of Agriculture, Yangzhou University, Yangzhou, Jiansu 225009 |
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| Abstract: | The yield-increasing potential of Intersubspecific hybrid rice (ISHR) was greater because of its large panicles, Compared with that of intervarietal hybrid rice (IVHR). ISHR had greater stomatal density and stomatal conductance, and higher photosynthetic rate from heading to maturity, The difference in dry matter accumulation was rather small between ISHR and IVHR before or at heading stage, but the former was lower or less than the latter in terms of the ratio of dry weight to spikelets DW(mg)/spikelet] and the usable carbohydrate reserved in steams, leaves and sheaths at heading stage. The dry matter production and DW(mg)/ spikelet of ISHR, however, were more or higher than those of IVHS after heading. ISHR was lower than IVSR in the transfer ratio of assimilate, the export and transformation percentage of the matter in steams and sheaths. Reasons for the low translocation of the assimilate to grains of ISHR were discussed. |
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| Keywords: | Intersubspecific hybrid rice Photosynthetic characteristics Dry matter accumulation Translocation percentage of assimilate |
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