大兴安岭典型森林沼泽植物叶片和细根碳氮磷化学计量特征

doi:10.13287/j.1001-9332.202010.007

应用生态学报 ›› 2020, Vol. 31 ›› Issue (10): 3385-3394.doi: 10.13287/j.1001-9332.202010.007

大兴安岭典型森林沼泽植物叶片和细根碳氮磷化学计量特征

刘旭艳^1,2, 胡宇坤^1*

¹中国林业科学研究院湿地研究所, 湿地生态功能与恢复北京市重点实验室, 北京 100091;
²中国科学院地理科学与资源研究所, 生态系统网络观测与模拟重点实验室, 北京 100101

收稿日期:2020-03-18 接受日期:2020-07-15 出版日期:2020-10-15 发布日期:2021-04-15
通讯作者: * E-mail: huyukun@caf.ac.cn
作者简介:刘旭艳, 女, 1986年生, 工程师。主要从事生物地球化学循环研究。E-mail: zlxuchen@163.com
基金资助:
国家自然科学基金项目(31901149)和中国林业科学研究院基本科研业务费专项 (CAFYBB2017QA039) 资助

C:N:P stoichiometry of leaves and fine roots in typical forest swamps of the Greater Hinggan Mountains, China

LIU Xu-yan^1,2, HU Yu-kun^1*

¹Beijing Key Laboratory of Wetland Ser-vices and Restoration, Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China;
²Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Received:2020-03-18 Accepted:2020-07-15 Online:2020-10-15 Published:2021-04-15
Contact: * E-mail: huyukun@caf.ac.cn
Supported by:
National Natural Science Foundation of China (31901149) and the Fundamental Research Funds of the Chinese Academy of Forestry (CAFYBB2017QA039).

摘要/Abstract

摘要： 探究大兴安岭典型森林沼泽不同植物叶片和细根生态化学计量特征,能够为进一步认识高纬度气候敏感生态系统养分利用策略和物质循环过程提供依据。对大兴安岭地区兴安落叶松-苔草、兴安落叶松-笃斯越桔-藓类和兴安落叶松-杜香-泥炭藓3种典型森林沼泽19种优势和亚优势维管植物叶片和细根碳氮磷计量特征(C∶N∶P)进行比较,分析不同森林沼泽类型、植物生长型和菌根类型叶片和细根C∶N∶P差异,通过标准化主轴回归分析叶片与细根C∶N∶P的关系。结果表明: 叶片C∶N∶P在种间水平具有最大的变异(42.5%～84.6%),且叶片和细根种间变异大小均为N∶P>C∶N>C∶P。土壤养分和水分含量较高的兴安落叶松-苔草沼泽叶片与细根C∶N和C∶P值较低,且3种森林沼泽植物叶片和细根N∶P均小于10,受N限制。草本植物叶片C∶P和细根C∶N、C∶P显著低于木本植物。外生菌根和杜鹃花类菌根植物叶片和细根C∶N和C∶P高于丛枝菌根和无菌根植物,且杜鹃花类菌根植物叶片和细根C∶P显著高于外生菌根植物。不同森林沼泽、生长型、菌根类型植物叶片和细根C∶N和C∶P差异明显,而N∶P相对稳定。森林沼泽植物叶片与细根C∶N、C∶P和N∶P呈线性正相关,植物地上与地下部分在生态化学计量特征上存在协同。

关键词: 生态化学计量, 叶片, 细根, 湿地, 生长型, 菌根类型, 氮限制

Abstract: Investigating ecological stoichiometry of leaves and fine roots of forest swamps in the Greater Hinggan Mountains will improve our understanding of plant nutrient use and material cycling in ecosystems at high latitudes with high sensitivity to climate change. In this study, we collected leaf and fine root samples from 19 dominant and subordinate vascular plant species and measured their C, N and P concentrations in three typical forest swamps (Larix gmelinii-Carex schmidtii, L. gmelinii-Vaccinium uliginosum-moss and L. gmelinii-Ledum palustre-Sphagnum) of the Greater Hinggan Mountains, China. We compared C:N:P stoichiometry in leaves and fine roots among different forest swamp types, plant growth forms, and mycorrhizal types. Standardized major axis regression was performed to examine the relationships between leaf and fine root stoichiometry. The results showed that interspecific variation accounted for the largest proportion of total variation in C:N:P stoichiometry of leaves (42.5%-84.6%). N:P had the highest, C:N had the intermediate, and C:P had the lowest interspecific variation in both leaves and fine roots. L. gmelinii-C. schmidtii forest swamps, which had higher soil nutrient and water availability, had lower C:N and C:P in leaves and fine roots. N:P of all three forest swamps were lower than 10, indicating N limitation in this ecosystem. Herbaceous plants had significantly lower leaf C:P, fine root C:N, and fine root C:P than woody species. Both ectomycorrhizal and ericoid mycorrhizal plants had higher leaf and fine root C:N and C:P than arbuscular mycorrhizal and non-mycorrhizal species, while the C:P of ericoid mycorrhizal plants was significantly higher than that of ectomycorrhizal species. Forest swamp type, plant growth form, and mycorrhizal type all had greater influences on leaf and fine root C:N and C:P rather than N:P. Leaf and fine root C:N, C:P, and N:P were positively correlated, indicating strong coordination between plant above- and below-ground C:N:P stoichiometry.

Key words: ecological stoichiometry, leaf, fine root, wetland, growth form, mycorrhizal type, N limitation

刘旭艳, 胡宇坤. 大兴安岭典型森林沼泽植物叶片和细根碳氮磷化学计量特征[J]. 应用生态学报, 2020, 31(10): 3385-3394.

LIU Xu-yan, HU Yu-kun. C:N:P stoichiometry of leaves and fine roots in typical forest swamps of the Greater Hinggan Mountains, China[J]. Chinese Journal of Applied Ecology, 2020, 31(10): 3385-3394.

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大兴安岭典型森林沼泽植物叶片和细根碳氮磷化学计量特征

C:N:P stoichiometry of leaves and fine roots in typical forest swamps of the Greater Hinggan Mountains, China

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