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氮沉降和干旱对阔叶红松林凋落物分解的影响

郑俊强 郭瑞红 李东升 李东 李金功 朱保坤 韩士杰

郑俊强, 郭瑞红, 李东升, 李东, 李金功, 朱保坤, 韩士杰. 氮沉降和干旱对阔叶红松林凋落物分解的影响[J]. 北京林业大学学报, 2016, 38(4): 21-28. doi: 10.13332/j.1000-1522.20150464
引用本文: 郑俊强, 郭瑞红, 李东升, 李东, 李金功, 朱保坤, 韩士杰. 氮沉降和干旱对阔叶红松林凋落物分解的影响[J]. 北京林业大学学报, 2016, 38(4): 21-28. doi: 10.13332/j.1000-1522.20150464
ZHENG Jun-qiang, GUO Rui-hong, LI Dong-sheng, LI Dong, LI Jin-gong, ZHU Bao-kun, HAN Shi-jie. Effects of nitrogen deposition and drought on litter decomposition in a temperate forest[J]. Journal of Beijing Forestry University, 2016, 38(4): 21-28. doi: 10.13332/j.1000-1522.20150464
Citation: ZHENG Jun-qiang, GUO Rui-hong, LI Dong-sheng, LI Dong, LI Jin-gong, ZHU Bao-kun, HAN Shi-jie. Effects of nitrogen deposition and drought on litter decomposition in a temperate forest[J]. Journal of Beijing Forestry University, 2016, 38(4): 21-28. doi: 10.13332/j.1000-1522.20150464

氮沉降和干旱对阔叶红松林凋落物分解的影响

doi: 10.13332/j.1000-1522.20150464
基金项目: 

“973”国家重点基础研究发展计划项目(2011CB403202、2014CB954400)、国家自然科学基金项目(41173087、41330530)

详细信息
    作者简介:

    郑俊强,博士,副研究员。主要研究方向: 森林土壤生态。Email: zhjq79@yahoo.com 地址:110016辽宁省沈阳市沈河区文化路72号中国科学院沈阳应用生态研究所。
    责任作者: 韩士杰,研究员,博士生导师。主要研究方向: 森林生态。Email: hansj@iae.ac.cn 地址:同上。

    郑俊强,博士,副研究员。主要研究方向: 森林土壤生态。Email: zhjq79@yahoo.com 地址:110016辽宁省沈阳市沈河区文化路72号中国科学院沈阳应用生态研究所。
    责任作者: 韩士杰,研究员,博士生导师。主要研究方向: 森林生态。Email: hansj@iae.ac.cn 地址:同上。

Effects of nitrogen deposition and drought on litter decomposition in a temperate forest

  • 摘要: 氮沉降和降水减少耦合作用对我国北温带森林凋落物分解的影响还知之甚少,通过常规的凋落物分解袋法进行了对照(CK)、施氮(N, 50 kg/(hm·a))、降雨减少(RP,-30%)和降雨减少加施氮(RP+N)4个处理对长白山阔叶红松林主要树种叶凋落物分解和碳、氮元素动态影响的研究。结果表明:凋落物分解95%需要6.025~15.167年,椴树的分解速率最快,其次是蒙古栎,红松最慢,三者混合后分解率介于期间。分解系数结果显示:施氮能在一定程度上促进紫椴叶凋落物的分解, 施氮对红松凋落物和混合凋落物分解则表现出抑制作用, 降雨减少对分解表现为明显的抑制作用,干旱情况下施氮后4种凋落物的分解系数介乎氮沉降和降雨减少两者之间,说明氮沉降和降雨减少存在交互作用。总体看来,氮沉降对凋落物分解和氮元素含量有一定的影响,并且与分解阶段和凋落物种类有关,降水减少对凋落物分解和碳氮元素比值具有显著的抑制作用。

     

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  • 收稿日期:  2015-12-04
  • 刊出日期:  2016-04-30

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