草地学报 ›› 2024, Vol. 32 ›› Issue (1): 121-129.DOI: 10.11733/j.issn.1007-0435.2024.01.013

• 研究论文 • 上一篇    下一篇

高寒草地四种植物叶片化学计量学特征及其对坡度的响应

鄯仁欠姐1, 姚步青2, 李永晓3, 马丽萍3, 雷雨田3, 马忠武3, 王芳萍1, 郭玉朋4, 周华坤2   

  1. 1. 青海大学生态环境工程学院, 青海 西宁 810016;
    2. 中国科学院西北高原生物研究所青海省寒区恢复学重点实验室, 青海 西宁 810008;
    3. 青海省交通规划设计研究院有限公司, 青海 西宁 810002;
    4. 青海民族大学生态环境与资源学院, 青海 西宁 810000
  • 收稿日期:2023-06-28 修回日期:2023-08-22 出版日期:2024-01-15 发布日期:2024-01-30
  • 通讯作者: 王芳萍,E-mail:fpingwang@qhu.edu.cn
  • 作者简介:鄯仁欠姐(1996-),女,藏族,青海互助人,硕士研究生,主要从事草地修复生态学研究,E-mail:2381070021@qq.com
  • 基金资助:
    国家自然科学基金(32160269);青海省科技厅项目(2020-ZJ-925)资助

Stoichiometries and Their Responses of Leaf of Four Plant Species in Alpine Grasslands to Slopes

SHAN Ren-qian-jie1, YAO Bu-qing2, LI Yong-xiao3, MA Li-ping3, LEI Yu-tian3, MA Zhong-wu3, WANG Fang-ping1, GUO Yu-peng4, ZHOU Hua-kun2   

  1. 1. College of Ecological and Environmental Engineering, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai Province 810016, China;
    2. Key Laboratory of Restoration Ecology of Cold Area in Qinghai Province, Northwest Institute of Plateau Biology, the Chinese Academy of Sciences, Xining, Qinghai Province 810008, China;
    3. Qinghai Provincial Transportation Planning and Design Research Institute Co. Ltd, Xining, Qinghai Province 810002, China;
    4. School of Ecology, Environment and Resources, Qinghai Minzu University, Xining, Qinghai Province 810000, China
  • Received:2023-06-28 Revised:2023-08-22 Online:2024-01-15 Published:2024-01-30

摘要: 本研究以高寒草甸和高寒灌丛共有物种黑褐苔草(Carex atrofusca Schkuhr Riedgr.)、黄花棘豆(Oxytropis ochrocephala Bunge.)、冷地早熟禾(Poa crymophila Keng.)、乳白香青(Anaphalis lactea Maxim.)为研究对象,比较分析四种植物叶片碳(Carbon,C)、氮(Nitrogen,N)、磷(Phosphorus,P)含量差异及其随坡度变化的变化趋势。结果表明:高寒草甸植物叶片C,N含量、C/N比值种间差异显著,高寒灌丛植物叶片N,P含量,C/N,C/P,N/P比值种间差异显著;高寒灌丛乳白香青叶片C/N,C/P比值和黄花棘豆叶片C/P,N/P比值显著高于高寒草甸;随着坡度增大,两种草地类型所有植物叶片C含量和N/P比值均无显著变化趋势;高寒草甸黑褐苔草和黄花棘豆叶片N含量显著减少,C/N比值显著增大;高寒灌丛乳白香青叶片P含量显著减少,C/P比值显著增大。两种草地类型植物叶片化学计量特征对坡度的响应差异说明了植物适应环境策略的多样化。

关键词: 高寒草地, 坡度, 植物化学计量学, 环境适应策略

Abstract: Four common species in alpine meadow and alpine shrub meadow, Carex atrofusca Schkuhr Riedgr., Oxytropis ochrocephala Bunge., Poa crymophila Keng. and Anaphalis lactea Maxim., were selected to compare and analyze their leaves' stoichiometric characteristics between two alpine meadows and their responses to the habitat slopes. The results showed that:(1) There were significant differences in leaf carbon (C), nitrogen (N) concentrations and C/N among four plant species in the alpine meadow, and there were significant interspecific differences in leaf N and phosphorus (P) concentrations, C/N, C/P and N/P value among the four species in the alpine shrub meadow. (2) Leaf C/N, C/P of A. lactea and leaf C/P and N/P of O. ochrocephala in the alpine shrub meadow were significantly higher than those in the alpine meadow. (3) With the increase of slope, the leaf C concentrations and N/P of all four plants in the two alpine grasslands had no significant change trend, while in the alpine meadow the N concentrations of C. atrofusca and O. ochrocephala decreased significantly, and their C/N significantly increased;in the alpine shrub meadow, the concentration of P in the leaf of A. lactea decreased significantly, and the C/P increased significantly. The differences in the leaves' stoichiometric characteristics and their responses to slope change between two alpine meadow grasslands indicated the diversification of adaptation strategies of the plant species to their environments.

Key words: Alpine grassland, Slope, Plant chemical stoichiometry, Environmental adaptation strategy

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