| CO2浓度升高对水稻抽穗期根系有关性状及根碳氮比的影响 |
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| 引用本文： | 陈改苹,朱建国,庞静,程磊,谢祖彬,曾青.CO2浓度升高对水稻抽穗期根系有关性状及根碳氮比的影响[J].中国水稻科学,2006,20(1):53-57. |
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| 作者姓名： | 陈改苹 朱建国 庞静 程磊 谢祖彬 曾青 |
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| 作者单位： | 中国科学院,南京土壤研究所,土壤与农业可持续发展国家重点实验室,江苏,南京,210008 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金;中国科学院知识创新工程项目 |
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| 摘 要： | 在FACE (free air carbon dioxide enrichment) 实验平台上,采用水培的方法观测了抽穗期水稻根系的生长情况。结果表明,FACE条件下根生物量、根体积和根冠比极显著增加且不定根明显增多、变粗。高CO2浓度显著降低了根中N含量,而C含量变化不明显,导致碳氮比极显著增加。基于单位根质量的根系活力在CO2浓度增加条件下极显著降低,养分吸收效率的降低可能是根中N含量下降的重要原因。
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| 关 键 词： | CO2浓度增加 水稻 根碳氮比 根系活力 |
| 文章编号： | 1001-7216（2006）04-0053-05 |
| 收稿时间： | 2005-01-04 |
| 修稿时间： | 2005-03-07 |
Effects of Free-Air Carbon Dioxide Enrichment(FACE) on Some Traits and C/N Ratio of Rice Root at the Heading Stage |
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| CHEN Gai-ping,ZHU Jian-guo,PANG Jing,CHENG Lei,XIE Zu-bin,ZENG Qing.Effects of Free-Air Carbon Dioxide Enrichment(FACE) on Some Traits and C/N Ratio of Rice Root at the Heading Stage[J].Chinese Journal of Rice Science,2006,20(1):53-57. |
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| Authors: | CHEN Gai-ping ZHU Jian-guo PANG Jing CHENG Lei XIE Zu-bin ZENG Qing |
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| Institution: | State Key Laboratory of Soil atzd Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008, China |
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| Abstract: | Rice root growth was examined by using hydroponics in a FACE(free-air carbon dioxide enrichment)study. Root biomass, root volume, ratio of root/shoot, number of adventitious roots and root diameter were all increased significantly under FACE conditions. CO_ 2 enrichment decreased the N content in the rice root, but did not change the C content, leading to an obvious increase in the ratio of C/N. Elevated CO_ 2 decreased the rice root activity remarkably. Decrement in nutrient uptake efficiency may be the mechanism of decreased N content in root. |
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| Keywords: | free-air COz enrichment rice C/N ratio of root root activity |
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