中苜一号紫花苜蓿碳同化分配与转移速率的研究

doi:10.11733/j.issn.1007-0435.2012.04.013

›› 2012, Vol. 20 ›› Issue (4): 679-685.DOI: 10.11733/j.issn.1007-0435.2012.04.013

中苜一号紫花苜蓿碳同化分配与转移速率的研究

杨世超, 邓波, 张蕴薇, 杨富裕

中国农业大学动物科技学院, 北京 100193

收稿日期:2012-03-15 修回日期:2012-05-19 出版日期:2012-08-15 发布日期:2012-08-28
通讯作者: 邓波
作者简介:杨世超(1987-),女,黑龙江绥化人,硕士研究生,研究方向为草地利用与管理,E-mail:ysc2889@163.com
基金资助:
国家科技支撑项目(2009BADA7B04)(2011BAD17B02);国家牧草产业技术体系(CARS-35)资助

Absorption and Transfer of Photosynthetic Carbon in Alfalfa (Zhongmu No. 1)

YANG Shi-chao, DENG Bo, ZHANG Yun-wei, YANG Fu-yu

Department of Grassland Science, College of Animal Science and Technology, China Agriculture University, Beijing 100193, China

Received:2012-03-15 Revised:2012-05-19 Online:2012-08-15 Published:2012-08-28

摘要/Abstract

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。

关键词: ¹³C脉冲标记, 光合碳分配, 紫花苜蓿

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.

Key words: ¹³C pulse labeling, Allocation of photosynthetic carbon, Alfalfa

中图分类号:

Q945.11

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]. , 2012, 20(4): 679-685.

YANG Shi-chao, DENG Bo, ZHANG Yun-wei, YANG Fu-yu. Absorption and Transfer of Photosynthetic Carbon in Alfalfa (Zhongmu No. 1)[J]. , 2012, 20(4): 679-685.

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中苜一号紫花苜蓿碳同化分配与转移速率的研究

Absorption and Transfer of Photosynthetic Carbon in Alfalfa (Zhongmu No. 1)

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