CO2 浓度升高对土壤 － 植物( 春小麦) 系统光 合碳分配和积累的影响
文献类型：期刊论文
| 作者 | 马田1,2,4 ; 刘 肖2,4; 李 骏2; 张旭东2,3; 何红波2
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| 刊名 | 核农学报
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| 出版日期 | 2015-01 |
| 卷号 | 28期号:12页码:2238-2246 |
| 关键词 | 13C 示踪 CO2 浓度升高 光合 C 分配 土壤 － 植物系统 |
| DOI | 10. 11869 /j． issn． 100-8551. 2014. 12． 2238 |
| 英文摘要 | The accumulation and dynamic distribution of photosynthetic products in soil-plant system under elevated CO2 is an important scientific issue in the carbon cycle of ecosystems． If this issue can be clarified，it will be of great significance for evaluating of soil carbon sequestration in agricultural ecosystem under the scenario of elevated CO2 ． In order to investigate the formation，accumulation and dynamic distribution of photosynthetic product in soil-plant system and its relationship with the crop growth under elevated atmospheric CO2，13C labelled CO2was supplied continuously at two levels to spring wheat in sealed greenhouses during a grow season． The13 C enrichment dynamics in the different organs of the wheat at different stages ( i． e． ，jointing，heading and harvest stage ) were determined and the transformation of the photosynthetic C into the belowground parts was measured simultaneously． The results show that the elevated CO2 could enhance plant photosynthesis to increase the biomass of all parts of wheat，especially at the jointing stage． In addition，the elevated CO2 increased the enrichment of photosynthetic C in all parts in the wheat． At the harvest stage，the accumulation of photosynthetic C in the seeds suggested that elevated CO2 eventually increased the wheat yield by increasing the biomass and enhancing the accumulation of photosynthetic C． At both CO2 levels，the13C enrichment in the soil increased with the growth of wheat，but the content of soil organic carbon ( SOC) did not change significantly in the current season，indicating the significant transformation of the photosynthetic carbon into soil constituents and thus enhancing the renewal of SOC． After a growing season of wheat，there is a total of 140mg·kg － 1 13 C incorporate into the soil under the ambient CO2 supply with the photosynthetic C contribution of 97. 9% ． At jointing and heading stages，there was no significant difference of13 C enrichment of the soil between the two CO2 levels．However，the value increased significantly ( from － 17. 9‰ to 3. 1‰) under the elevated CO2，after wheat harvest，suggesting that more photosynthetic C were transferred into the soil by the process of roots and thus the renewal of SOC was enhanced significantly with the percentage up to 52. 4% ． |
| 语种 | 中文 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/40084]  |
| 专题 | 中国科学院烟台海岸带研究所 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 |
| 通讯作者 | 张旭东 |
| 作者单位 | 1.植被与环境变化国家重点实验室，中国科学院植物研究所，北京 100049 2.森林与土壤生态国家重点实验室/中国科学院沈阳应用生态研究所，辽宁 沈阳 110016 3.辽宁沈阳农田生态系统国家野外观测研究站，辽宁 沈阳 110016 4.中国科学院大学，北京 100049 |
| 推荐引用方式 GB/T 7714 | 马田,刘 肖,李 骏,等. CO2 浓度升高对土壤 － 植物( 春小麦) 系统光 合碳分配和积累的影响[J]. 核农学报,2015,28(12):2238-2246. |
| APA | 马田,刘 肖,李 骏,张旭东,&何红波.(2015).CO2 浓度升高对土壤 － 植物( 春小麦) 系统光 合碳分配和积累的影响.核农学报,28(12),2238-2246. |
| MLA | 马田,et al."CO2 浓度升高对土壤 － 植物( 春小麦) 系统光 合碳分配和积累的影响".核农学报 28.12(2015):2238-2246. |
入库方式： OAI收割
来源：烟台海岸带研究所
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