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应用生态学报 ›› 2020, Vol. 31 ›› Issue (12): 4051-4057.doi: 10.13287/j.1001-9332.202012.004

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3种功能型林木幼苗叶片与细根碳氮磷化学计量特征及其异速关系

杨婷1, 钟全林1,2,3*, 李宝银2,3, 程栋梁1,2,3, 徐朝斌2,3, 余华1,4, 邹宇星1   

  1. 1福建师范大学地理科学学院, 福州 350007;
    2湿润亚热带山地生态国家重点实验室培育基地, 福州 350007;
    3福建师范大学福建省植物生理生态重点实验室, 福州 350007;
    4闽江学院海洋学院, 福州 350108
  • 收稿日期:2020-06-10 接受日期:2020-09-21 发布日期:2021-06-15
  • 通讯作者: *E-mail: qlzhong@126.com
  • 作者简介:杨婷,女,1996年生,硕士研究生。主要从事植物生理生态研究。E-mail:Yang_t96@126.com
  • 基金资助:
    国家自然科学基金项目(31971643,41601008)、福建省自然科学科技厅产学合作项目(2019N5009)、福建省杰出青年科学基金项目(2018J07003)、福建省自然科学基金面上项目(2018J01737,2018J01479)和国家重点研发计划项目(2017YFC0505400)资助

Stoichiometry of carbon, nitrogen and phosphorus and their allometric relationship between leaves and fine roots of three functional tree seedlings.

YANG Ting1, ZHONG Quan-lin1,2,3*, LI Bao-yin2,3, CHENG Dong-liang1,2,3, XU Chao-bin2,3, YU Hua1,4, ZOU Yu-xing1   

  1. 1College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China;
    2Breeding Base of State Key Laboratory of Humid Subtropical Mountian Ecology, Fuzhou 350007, China;
    3Fujian Province Key Laboratory of Plant Ecophysiology, Fujian Normal University, Fuzhou 350007, China;
    4College of Oceanography, Minjiang University, Fuzhou 350108, China
  • Received:2020-06-10 Accepted:2020-09-21 Published:2021-06-15
  • Contact: *E-mail: qlzhong@126.com
  • Supported by:
    National Natural Science Foundation of China (31971643, 41601008), the Industry-University Cooperation Project of Fujian Science and Technology Department (2019N5009), the Fujian Natural Science Fund for Distinguished Young Scholars (2018J07003), the General Program of Natural Science Foundation of Fujian Province (2018J01737, 2018J01479), and the National Key Research and Development Program of China (2017YFC0505400).

摘要: 为了比较不同功能型林木叶片与细根碳氮磷化学计量特征及其异速关系的差异,本研究以刨花楠(常绿阔叶)、福建山樱花(落叶阔叶)和福建柏(常绿针叶)的幼苗为对象,对其叶片和细根的碳(C)、氮(N)、磷(P)含量及其计量比关系进行分析。结果表明: 3种树木幼苗的叶片与细根的C、N、P含量及其计量比存在显著差异,其中,叶片与细根的C含量及C/N、C/P均以刨花楠最高,N含量和N/P以福建山樱花最高,P含量以福建柏最高;3种幼苗叶片的C、N、P含量和C/P、N/P均高于细根。叶片的C、N、P含量及其计量比之间的异速关系与细根不同,且受功能型差异的影响;3种幼苗叶片的C/P与N/P之间存在着指数明显不同的异速关系,但其细根的N、P含量均为等速关系。3种幼苗叶片和细根的C、N、P含量及其计量比关系也存在差异;刨花楠叶片和细根的关系主要显示为叶片C含量与细根P含量的异速关系,福建山樱花则主要显示在叶片C、N含量及C/N、N/P与细根C/N、N/P间的异速或等速关系,而福建柏主要是叶片C含量与细根C、N、P含量间的异速关系,福建山樱花叶片与细根的养分分配更具协调性。3种幼苗叶片和细根对P的投资策略具有相似性。研究结果为实施林木苗期精准养分管理与高效培育技术等提供了科学依据。

关键词: 功能型, 生态计量学, 异速生长, 叶片, 细根, 树木幼苗

Abstract: We analyzed the contents and stoichiometric ratios of carbon (C), nitrogen (N) and phosphorus (P) in leaves and fine roots of Machilus pauhoi (an evergreen broad-leaved species), Cerasus campanulata (a deciduous broad-leaved species) and Fokienia hodginsii (an evergreen coniferous species) to compare the leaf and root stoichiometry and allometric relationship between different functional groups of trees. There were significant difference in the contents and stoichiometry of C, N and P in the leaves and fine roots among different functional groups. C content, C/N and C/P of the leaves and roots were the highest in M. pauhoi. N content and N/P of the leaves and roots were the highest in C. campanulata, whereas P content of the leaves and roots was the highest in F. hodginsii. The allometric relationship of C, N and P contents as well as their stoichiometric ratios between the leaves and fine roots showed significant difference, which was affected by functional difference. The allometric relationship between C/P and N/P with significantly different allometric indexes in leaves in seedlings of those three tree species, while the isometric relationship between the contents of N and P was found in fine roots. There were significant difference in the C, N and P stoichiometry between the leaves and fine roots. The allometric relationship between leaf C content and root P content in M. pauhoi was detected. C and N contents and C/N, N/P in leaves generally had the allometric or isokinetic relationships with C/N, N/P of fine roots. There were allometric relationships between the leaf C content and the root C, N and P contents in F. hodginsii. It was concluded that nutrient allocation between leaves and fine roots of C. campanulata was more strongly coordinated. The investment strategy of P for leaves and fine roots across those three tree species was similar. The results provided scientific reference for accurate nutrient management at seedling stage and efficient cultivation technique.

Key words: functional type, ecological stoichiometry, allometry, leaf, fine root, tree seedling.