FENG Jinghong,LIU Ying,XIAO Henglin,et al.Photosynthesis and Carbon Sequestration Characteristics of Typical Plants and Their Influencing Factors in Reservoir Riparian Region of Three Gorges Reservoir[J].Research of Soil and Water Conservation,2020,27(01):305-311.
三峡库区消落带典型植物光合固碳能力及影响因素
- Title:
- Photosynthesis and Carbon Sequestration Characteristics of Typical Plants and Their Influencing Factors in Reservoir Riparian Region of Three Gorges Reservoir
- 文章编号:
- 1005-3409(2020)01-0305-07
- Keywords:
- water-level-fluctuating zone of Three Gorges Reservoir; carbon sink; photosynthetic and Carbon Sequestration
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- 为了探究三峡库区消落带湿地生态系统植被的光合固碳特性及其碳汇潜力,选取15种典型植物,测定并定量化分析了植物的光合固碳能力,并对其与主要环境生理影响因子、叶片氮磷生态学计量特征的相关性进行了分析。结果表明:(1)15种典型植物净光合速率基本上均与光合有效辐射、蒸腾速率及气孔导度等呈显著或极显著的正相关,与胞间CO2浓度呈显著或极显著的负相关;(2)不同生活型植物的全氮与同尺度区域的植物叶片氮素含量相当,磷含量要高于其他同尺度区域,而不同生活型植物的日平均光合速率与叶片全氮、全磷及氮磷比之间相关性不显著;(3)不同类型植物日光合净同化量、单位叶面积固碳量及单位土地面积固碳量均不相同,乔木中的竹柳,灌木中的牡荆、地桃花,草本中的芦苇、辣蓼的固碳能力较强。综合分析,在三峡库区消落带生态修复工程中应着重选择竹柳、地桃花、芦苇、辣蓼等高效固碳植物并进行合理配植,构建多层复合配置的林灌草的模式,从而改善库区消落带生态问题。
- Abstract:
- In order to explore the vegetation characteristics of photosynthetic carbon sequestration and carbon sequestration potential of wetland ecosystem in the Three Gorges Reservoir area. 15 species of typical plants in the water-level-fluctuating zone of Three Gorges Reservoir in Chongqing were selected as the research samples to analyze their property of photosynthetic and carbon sequestration. The daily carbon sequestration capacity was quantitatively calculated. And then the correlation between photosynthesis and the main physiological environment factors and the stoichiometric characteristics of nitrogen(N), phosphorus(P)in leaves were analyzed. The results show that:(1)the total nitrogen of plant leaf among the tested plant types is equivalent to that on the regional scale, but the phosphorus content is much higher, and there is no correlation between the average photosynthetic rate and leaf total nitrogen and total phosphorus;(2)there is a significant or extremely significant positive correlation between the net photosynthetic rate and photosynthetic active radiation, transpiration rate and stomatal conductance, but a significant or extremely significant negative correlation with intercellular CO2 concentration;(3)different types of plants have different assimilation amounts of sunlight, carbon sequestration amount per unit leaf area and carbon sequestration amounts per unit land area; with respect to the carbon sequestration ability, Salix sp, Vitex negundo var. cannabifolia and Urena lobata, Phragmites australias and Polygonum hydropiper have the higher abilities of carbon sequestration. In the ecological restoration project of the water-level-fluctuating zone of the Three Gorges Reservoir Area, we should select some vegetation with high efficient and potential carbon sinks, such as Salix, Urena lobata, Phragmites australias and Polygonum hydropiper, and so on, and to build multi-layer mixed community, as well as to solve the ecological problems of the water-level-fluctuating zone of the Three Gorges Reservoir Area.
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备注/Memo
收稿日期:2019-01-21 修回日期:2019-03-02
资助项目:国家重点研发计划”西南水电高坝大库梯级开发的生态保护与恢复技术”(2016YFC0502208);国家自然科学基金青年项目(31500577)
第一作者:冯晶红(1988—),女,湖北荆州人,在读博士,讲师,主要从事景观生态修复与环境保护研究。E-mail:Feng_jinghong@yeah.net
通信作者:刘瑛(1983—),女,山西长治人,副教授,主要从事水土保持及河流生态修复方向研究。E-mail:lycg06@163.com