| 中苜一号紫花苜蓿碳同化分配与转移速率的研究 |
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| 引用本文： | 杨世超,邓波,张蕴薇,杨富裕. 中苜一号紫花苜蓿碳同化分配与转移速率的研究[J]. 草地学报, 2012, 20(4): 679-685. DOI: 10.11733/j.issn.1007-0435.2012.04.013 |
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| 作者姓名： | 杨世超 邓波 张蕴薇 杨富裕 |
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| 作者单位： | 中国农业大学动物科技学院, 北京 100193 |
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| 基金项目： | 国家科技支撑项目(2009BADA7B04)(2011BAD17B02);国家牧草产业技术体系(CARS-35)资助 |
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| 摘 要： | 对紫花苜蓿(Medicago sativa L.)(中苜一号)的生长条件进行控制,并在分枝期对其进行13C脉冲标记,收集标记后第6,12,18,24,30 d的叶、茎、根以及土壤样品,测定各样品中13C含量,以此来探讨苜蓿光合碳的吸收与转移。结果表明:苜蓿各组分光合产物的分配顺序为茎>叶>根;13C转移速率为叶>茎>根,随着时间的延长,苜蓿各组分13C含量逐渐减少,最终达到稳定状态;渗漏到土壤中的13C含量在0~10 cm土壤层显著高于10~20 cm,但10~20 cm的13C含量比较稳定。
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| 关 键 词： | 13C脉冲标记 光合碳分配 紫花苜蓿 |
| 收稿时间： | 2012-03-15 |
Absorption and Transfer of Photosynthetic Carbon in Alfalfa(Zhongmu No.1) |
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| YANG Shi-chao , DENG Bo , ZHANG Yun-wei , YANG Fu-yu. Absorption and Transfer of Photosynthetic Carbon in Alfalfa(Zhongmu No.1)[J]. Acta Agrestia Sinica, 2012, 20(4): 679-685. DOI: 10.11733/j.issn.1007-0435.2012.04.013 |
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| Authors: | YANG Shi-chao DENG Bo ZHANG Yun-wei YANG Fu-yu |
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| Affiliation: | Department of Grassland Science, College of Animal Science and Technology, China Agriculture University, Beijing 100193, China |
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| Abstract: | Alfalfa ’Zhongmu No.1’ was planted under controlled condition and marked by 13C pulse labeling at branching stage.Alfalfa leaf,stem and root as well as soil samples were collected on 6-,12-,18-,24-and 30-days after labeling to investigate the absorption and transfer of photosynthetic carbon in alfalfa.Results showed that the distribution of photosynthetic products in alfalfa organs was ordered as stem>leaves>roots.The transfer speed of 13C in alfalfa organs was ordered as leaves>stem>roots.The contents of 13C in alfalfa organs decreased gradually with the marked time,and finally stabilized.The content of 13C leaking into soil in the 0~10 cm soil layer was higher than that in 10~20 cm,and the content of 13C in 10~20 cm soil layer was more stable. |
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| Keywords: | 13C pulse labeling Allocation of photosynthetic carbon Alfalfa |
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