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应用生态学报 ›› 2018, Vol. 29 ›› Issue (2): 467-473.doi: 10.13287/j.1001-9332.201802.003

• 研究报告 • 上一篇    下一篇

氮沉降和经营强度对毛竹林凋落叶生态化学计量特征的影响

姚钧能1, 吕建华1,2, 俞卫良3, 张君波1, 雷赵枫1, 李全1, 宋新章1,2*   

  1. 1浙江农林大学省部共建亚热带森林培育国家重点实验室, 杭州 311300;
    2浙江天目山森林生态系统定位观测研究站, 杭州 311311;
    3天目山国家级自然保护区管理局, 杭州 311311
  • 收稿日期:2017-06-22 出版日期:2018-02-18 发布日期:2018-02-18
  • 通讯作者: E-mail: xzsong@126.com
  • 作者简介:姚钧能, 男, 1996年生. 主要从事森林生态学研究. E-mail: 2352367010@qq.com
  • 基金资助:

    本文由国家自然科学基金项目(31470529, 31270517)资助

Effects of nitrogen deposition and management intensity on stoichiometry of leaf litter in Moso bamboo forest.

YAO Jun-neng1, LYU Jian-hua1,2, YU Wei-liang3, ZHANG Jun-bo1, LEI Zhao-feng1, LI Quan1, SONG Xin-zhang1,2*   

  1. 1State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China;
    2Tianmu Mountain Forest Ecosystem Research Station, Hangzhou 311311, China;
    3Management Bureau of Tianmu Mountain Nature Reserve, Hangzhou 311311, China
  • Received:2017-06-22 Online:2018-02-18 Published:2018-02-18
  • Contact: E-mail: xzsong@126.com
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (31470529, 31270517).

摘要: 为探讨氮沉降和经营强度对毛竹凋落叶化学计量特征的影响,研究了不同强度模拟氮沉降(低氮: 30 kg N·hm-2·a-1;中氮: 60 kg N·hm-2·a-1;高氮: 90 kg N·hm-2·a-1)对两种经营强度(粗放经营和集约经营)毛竹林凋落叶生态化学计量特征的影响.结果表明: 相比于粗放经营,集约经营使毛竹凋落叶C、N、P含量分别显著提高9.3%、32.4%和22.7%, 而C∶N、C∶P和N∶P分别显著降低17.4%、54.3%和44.6%.粗放经营条件下,低、中氮沉降显著提高了毛竹凋落叶C、N、P含量,但显著降低了C∶N、C∶P和N∶P;高氮沉降显著提高了C、N含量及C∶P、N∶P,但显著降低了P含量.集约经营条件下,低氮沉降显著提高了毛竹凋落叶P含量,降低了C含量及C∶P、N∶P;中氮沉降显著提高了N、P含量,降低了C含量及C∶N、C∶P和N∶P;高氮沉降显著提高了C∶N、C∶P和N∶P,降低了P含量.经营方式和氮沉降的交互作用显著影响了凋落叶除C∶N以外的生态化学计量特征.毛竹凋落叶P与土壤P含量呈显著相关.

关键词: 集约经营, 化学计量, 毛竹, 粗放经营, 氮沉降

Abstract: In this study, a field experiment was conducted to estimate the effects of simulated nitrogen (N) deposition (low-N: 30 kg N·hm-2·a-1, moderate-N: 60 kg N·hm-2·a-1, high-N: 90 kg N·hm-2·a-1) on ecological stoichiometry of leaf litter in Moso bamboo forest under conventional management (CM) and intensive management (IM) practices. The results showed that compared with CM, IM significantly increased C, N and P concentrations of leaf litter by 9.3%, 32.4% and 22.7%, respectively, but significantly decreased C:N, C:P and N:P ratios by 17.4%, 54.3% and 44.6%, respectively. In CM Moso bamboo plots, low- and moderate-N deposition significantly increased C, N and P concentrations of leaf litter but decreased C:N, C:P and N:P, high-N deposition significantly increased C, N concentrations, C:P and N:P, but decreased P concentration. In IM Moso bamboo plots, low-N deposition significantly increased P concentration but decreased C concentrations, C:P and N:P, moderate-N deposition significantly increased N and P concentrations but decreased C concentration, C:N, C:P and N:P, high-N deposition significantly increased C:N, C:P and N:P but decreased P concentration. The interaction of management intensity and N deposition significantly influenced stoichiometry of leaf litter, except for C:N. The P concentration of leaf litter was significantly correlated with P concentration in soils.

Key words: nitrogen deposition, intensive management., stoichiometry, Moso bamboo, conventional management