草地学报

草地学报 ›› 2025, Vol. 33 ›› Issue (4): 1145-1155.DOI: 10.11733/j.issn.1007-0435.2025.04.014

• 研究论文 • 上一篇    

泽曲湿地不同植被类型植物叶片光合生理性状研究

魏卫东1,2, 刘育红1, 马辉1   

  1. 1. 青海大学农牧学院, 青海 西宁 810016;
    2. 青海省高寒草地适应性管理重点实验室, 青海 西宁 810016
  • 收稿日期:2024-07-15 修回日期:2024-09-01 发布日期:2025-04-28
  • 通讯作者: 魏卫东,E-mail:qhweidong@163.com
  • 作者简介:魏卫东（1970-），男，汉族，河南舞阳人，硕士，教授，主要从事高寒草地生态环境研究，E-mail：qhweidong@163.com
  • 基金资助:
    青海省科技厅应用基础研究项目（2022-ZJ-705）资助

Study on Photosynthetic Physiological Traits of Plant Leaves of Different Vegetation Types in Zequ Wetland

WEI Wei-dong1,2, LIU Yu-hong1, MA Hui1   

  1. 1. College of Agriculture and Animal Husbandry, Qinghai University, Xining, Qinghai Province 810016;
    2. Qinghai Provincial Key Laboratory of Adaptive Management on Alpine Grassland, Xining, Qinghai Province 810016, China
  • Received:2024-07-15 Revised:2024-09-01 Published:2025-04-28

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摘要： 为探讨不同植被类型下物种和群落尺度的光合生理性状特征及差异性，以沼泽植被、沼泽化草甸和高寒草甸为对象，原位测定和研究群落中主要植物的净光合速率（Pn）、蒸腾速率（Tr）、气孔导度（Gs）和胞间CO2浓度（Ci）等。结果表明：物种尺度的Pn，Tr，Gs，Ci，叶绿素相对含量和水分利用效率分别为3.99~24.95 μmol·m-2·s-1CO2，2.03~8.13 mmol·m-2·s-1H2O，0.10~0.71 mol·m-2·s-1，254.51~334.66 μmol·mol-1，19.19~39.58和1.41~5.08 μmol·mmol-1，光合生理性状不同物种间差异极显著（P<0.01）。群落尺度下沼泽植被与高寒草甸间各光合生理性状差异极显著（P<0.01），总体呈沼泽植被>高寒草甸趋势。沼泽化草甸、高寒草甸Pn与其他光合生理性状间均极显著正相关（P<0.01），3种植被类型Gs与Ci间极显著正相关（P<0.01），Tr，Gs，Ci均与水分利用效率负相关。沼泽植被和沼泽化草甸净光合速率、水分利用效率更高，高度适应高寒湿地生境，在维持湿地生态系统结构和功能方面更具意义。

关键词: 沼泽植被, 沼泽化草甸, 高寒草甸, 叶片, 光合生理

Abstract: In order to explore the characteristics and differences of photosynthetic physiological traits at species and community scales under different vegetation types， the net photosynthetic rate （Pn）， transpiration rate （Tr）， stomatal conductance （Gs）， and intercellular CO2 concentration （Ci） of the main plants in the community were measured and studied in situ in marsh vegetation， marshy meadow， and alpine meadow. The results showed that： In the species scale， the ranges of Pn， Tr， Gs， Ci， relative chlorophyll content， and water use efficiency were 3.99~24.95 μmol·m-2·s-1 CO2， 2.03~8.13 mmol·m-2·s-1 H2O， 0.10~0.71 mol·m-2·s-1， 254.51~334.66 μmol·mol-1， 19.19~39.58， 1.41~5.08 μmol·mmol-1， respectively. There were extremely significant differences in photosynthetic physiological traits among different species（P<0.01）. There were extremely significant differences in various photosynthetic physiological traits between marsh vegetation and alpine meadow at community scale（P<0.01）， and the variation trend of marsh vegetation was larger than that of alpine meadow. In marshy meadows and alpine meadows， there was extremely significant positive correlation between Pn and other traits （P<0.01）. There was extremely significant positive correlation between Gs and Ci among the three vegetation types （P<0.01）， and there was a negative correlation between Tr， Gs， Ci and water use efficiency. The net photosynthetic rate and water use efficiency of marsh vegetation and marshy meadows are higher， which are highly adapted to alpine wetland habitats， and have higher significance in maintaining the structure and function of wetland ecosystems.

Key words: Marsh vegetation, Marshy meadow, Alpine meadow, Leaves, Photosynthetic physiology

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