盐城滨海淡水湿地芦苇光合特性及叶绿素荧光特性日变化研究  

Study on Diurnal Variation of Photosynthetic and Chlorophyll Fluorescence Characteristics of Phragmites australis in Yancheng Coastal Freshwater Wetland

作　　者：陈皓 刘为东[1] 李静 叶思源[2,3,4] 江星浩 韩宗珠 CHEN Hao;LIU Wei-dong;LI Jing(Survey Engineering Institute of Jiangsu Province,Nanjing,Jiangsu 210003)

机构地区：[1]江苏省测绘工程院,江苏南京210003 [2]青岛海洋地质研究所中国地质调查局滨海湿地生物地质重点实验室,山东青岛266037 [3]海洋地质过程与环境功能实验室崂山实验室,山东青岛266061 [4]山东大学海洋研究院,山东青岛266237 [5]山东省煤田地质规划勘察研究院,山东济南250104 [6]中国海洋大学海洋地球科学学院,山东青岛266100

出　　处：《安徽农业科学》2024年第4期71-73,77,共4页Journal of Anhui Agricultural Sciences

基　　金：国家林业和草原局应急揭榜挂帅项目(202302);国家自然科学基金区域发展联合基金重点项目(U22A20558);崂山实验室科技创新项目(LSKJ202204003);国家重点研发计划中美政府间科技创新重点专项(2016YFE0109600);中国地质调查局项目(DD20189503,DD20221775);黄海湿地研究院开放基金项目(20210108)。

摘　　要：[目的]探讨盐城滨海淡水湿地芦苇光合特性和叶绿素荧光特性。[方法]以滨海淡水湿地芦苇为研究对象,测定光合参数和叶绿素荧光参数日变化,并与滨海盐沼湿地芦苇进行比较。[结果]盐城滨海淡水湿地芦苇净光合速率、气孔导度、蒸腾速率和胞间CO_(2)浓度日变化呈双峰型,水分利用效率日变化呈“U”型。电子传递速率日变化整体上呈下降趋势,非光化学淬灭系数和实际光化学量子效率日变化分别呈倒“U”型和“U”型。滨海淡水湿地芦苇净光合速率高于滨海盐沼湿地芦苇,具有更强的光合能力。[结论]盐城滨海淡水湿地芦苇相较于滨海盐沼湿地芦苇具有更强的光合固碳能力。[Objective]To explore the photosynthetic characteristics and chlorophyll fluorescence characteristics of Phragmites australis in Yancheng coastal freshwater wetland.[Method]Taking Phragmites australis in Yancheng coastal freshwater wetland as the research object,the diurnal changes of photosynthetic parameters and chlorophyll fluorescence parameters of Phragmites australis in coastal freshwater wetlands were measured and compared with Phragmites australis in coastal salt marshes.[Result]The diurnal variation of net photosynthetic rate,stomatal conductance,transpiration rate and intercellular CO_(2)concentration of Phragmites australis in the coastal freshwater wetland of Yancheng presented a double peak pattern,the diurnal variation of water use efficiency showed a"U"pattern.The diurnal variation of electron transfer rate had a downward trend as a whole,and the diurnal variation of non photochemical quenching coefficient and actual photochemical quantum efficiency presented an inverted"U"pattern and a"U"pattern,respectively.The net photosynthetic rate of Phragmites australis in coastal freshwater wetland was higher than that in coastal salt marsh wetland,and it had stronger photosynthetic capacity.[Conclusion]Compared with coastal salt marsh wetlands,Phragmites australis in Yancheng coastal freshwater wetland has stronger photosynthetic carbon fixation capacity.

关 键 词：滨海淡水湿地 芦苇 日变化 光合特性 叶绿素荧光特性 

分 类 号：X173[环境科学与工程—环境科学]