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应用生态学报 ›› 2021, Vol. 32 ›› Issue (4): 1193-1200.doi: 10.13287/j.1001-9332.202104.010

• 研究论文 • 上一篇    下一篇

江西阳际峰30种阔叶树叶片氮磷含量及再吸收效率

邵静1, 陈晓萍1, 李锦隆1, 胡丹丹1,2, 王满堂1,3, 钟全林1,2, 程栋梁1,2*   

  1. 1福建师范大学福建省植物生理生态重点实验室, 福州 350007;
    2福建师范大学地理研究所, 福州 350007;
    3枣庄学院城市与建筑工程学院, 山东枣庄 277160
  • 收稿日期:2020-08-09 接受日期:2021-01-30 发布日期:2021-10-25
  • 通讯作者: *E-mail: chengdl02@aliyun.com
  • 作者简介:邵 静, 女, 1996年生, 硕士研究生。主要从事植物生理生态研究。E-mail: 17835422335@163.com
  • 基金资助:
    国家自然科学基金项目(32071555,31722007)、国家重点研发计划项目(2017YFC0505400)和福建省杰出青年滚动项目(2018J07003)资助

Nitrogen and phosphorus contents and resorption efficiency of thirty broadleaved woody plants in Yangjifeng, Jiangxi, China.

SHAO Jing1, CHEN Xiao-ping1, LI Jin-long1, HU Dan-dan1,2, WANG Man-tang1,3, ZHONG Quan-lin1,2, CHENG Dong-liang1,2*   

  1. 1Fujian Provincial Key Laboratory of Plant Ecophysiology, Fujian Normal University, Fuzhou 350007, China;
    2Institute of Geography, Fujian Normal University, Fuzhou 350007, China;
    3School of City and Civil Enginee-ring, Zaozhuang University, Zaozhuang 277160, Shandong, China
  • Received:2020-08-09 Accepted:2021-01-30 Published:2021-10-25
  • Contact: *E-mail: chengdl02@aliyun.com
  • Supported by:
    National Natural Science Foundation of China (32071555, 31722007), the National Key R&D Program of China (2017YFC0505400), and the Fujian Natural Science Fund for Distinguished Young Scholars (2018J07003).

摘要: 养分再吸收是植物养分利用的重要策略,体现了植物对养分留存、利用和适应环境的能力。为研究亚热带不同生活型(常绿与落叶)阔叶树养分含量与养分再吸收的关系,以江西阳际峰国家级自然保护区内30种阔叶树为研究对象,测定成熟和衰老叶片氮(N)和磷(P)含量,分析常绿和落叶树种叶片N和P含量及其再吸收效率差异,揭示阔叶树种叶片养分再吸收效率对植物生活型的响应。结果表明: 落叶树种成熟叶片N和P含量显著高于常绿树种,衰老叶片P含量显著高于常绿树种,而两者衰老叶N含量差异不显著;30种阔叶林木叶片的氮再吸收效率(NRE)与磷再吸收效率(PRE)平均值分别为49.6%和50.9%,两种生活型树种间叶片的NRE与PRE无显著差异;落叶和常绿树种叶片的NRE均与衰老叶N含量呈显著负相关,PRE则与衰老叶P含量呈显著负相关,且这种关系在不同生活型之间差异不显著;总物种的PRE-NRE异速生长指数为1.18。江西阳际峰30种不同生活型阔叶树的养分再吸收效率会影响衰老叶片的养分状况,且相较于N,植物偏好从衰老叶中再吸收P。

关键词: 养分再吸收效率, 成熟叶, 衰老叶, 生活型, 氮,

Abstract: Nutrient resorption is an important strategy of nutrient conservation, which reflecting the ability of plants to conserve and utilize nutrients and adapt to environment. To explore the relationship between nutrient content and nutrient resorption of broadleaved woody species of different life forms (i.e., evergreen vs. deciduous), we sampled 30 broadleaved woody species in subtropical region of China located in Yangjifeng National Nature Reserve, Jiangxi Province. The nitrogen (N) and phosphorus (P) concentrations in green and senescent leaves of each species were measured to calculate nutrient resorption efficiency. Furthermore, we analyzed the relationship of leaf nutrient concentration and resorption efficiency for the different life forms. The results showed that N and P concentrations in green leaves were significantly higher in deciduous trees than those in evergreen trees. The P concentrations of senescent leaves in deciduous woody species was significantly higher than that in evergreen woody species. There was no significant difference of N concentration in senescent leaves between evergreen and deciduous species. Nitrogen resorption efficiency (NRE) and phosphorus resorption efficiency (PRE) of the 30 broadleaved woody species were 49.6% and 50.9%, respectively. There were no significant differences between the NRE and PRE of evergreen and deciduous species. NRE and PRE negatively correlated with N and P concentrations in senescent leaves, respectively. Additionally, evergreen and deciduous species showed similar relationships between nutrient resorption efficiency and nutrient concentration in senescent leaves. The sca-ling exponent of allometric relationship between NRE and PRE was 1.18 across all the species. The nutrient resorption efficiency of all the species were affected by the nutrient status of the senesced leaves. Plants examined in this study generally re-absorbed P from senescing leaves than N.

Key words: nutrient resorption efficiency, green leaf, senescent leaf, life form, nitrogen, phosphorus