首页关于本刊影响因子及获奖投稿须知订阅及广告专辑与专题学术会议绿色发表通道优秀论文 
方华,莫江明.氮沉降对森林凋落物分解的影响
.生态学报,2006,26(9):3127~3136
本文二维码信息
二维码(扫一下试试看!)
氮沉降对森林凋落物分解的影响
Effects of nitrogen deposition on forest litter decomposition
投稿时间:2005-12-13  最后修改时间:2006-07-16
DOI:
关键词氮沉降  凋落物分解  影响  全球变化
Key Wordsnitrogen deposition  litter decomposition  effects  global change
基金项目
作者单位
方华 中国科学院华南植物园鼎湖山森林生态系统定位研究站, 广东 肇庆鼎湖 526070; 广州地理研究所, 广州 510070; 中国科学院研究生院, 北京 100039 
莫江明 中国科学院华南植物园鼎湖山森林生态系统定位研究站, 广东 肇庆鼎湖 526070 
摘要点击次数 3804
全文下载次数 2360
摘要:
氮沉降增加作为全球变化的重要现象之一,已经并将继续对森林凋落物分解产生影响。综述了国内外氮沉降对森林凋落物分解影响及其机理的研究现状。氮沉降对凋落物分解的影响可分为直接影响和间接影响。氮沉降通过影响森林地被物组成和凋落物化学成分,间接影响凋落物分解。氮沉降对凋落物分解的直接影响表现为促进、无影响和抑制3种效果。分析了产生以上影响效果的作用机理,介绍了氮沉降对森林凋落物分解影响的研究方法,探讨了目前研究存在的问题,讨论了未来该方面研究的重点和方向。
Abstract:
Human activities such as combustion of fossil fuels, intensive agriculture and stockbreeding, have significantly altered the global nitrogen cycle in the last several decades, resulting in increases in the concentrations of nitrogenous compounds in the atmosphere and increases in N deposition several fold. Chronically elevated N deposition to forests can lead to changes in tree growth, mortality, species composition, and to possible decline in soil fertility and drainage water quality. A large number of experiments have been carried out in Europe and Northern America to identify the specific role of N deposition on changes observed in water quality and tree health. Chronically elevated N deposition also affects litter decomposition, a critical processes controlling nutrient cycling, soil humus formation, soil fertility, and primary productivity. Based on available scientific evidence the effects of N deposition on forest litter decomposition are reviewed in this paper. Nitrogen deposition can have indirect and direct effects on forest litter decomposition. By changing the composition of the forest floor and litter chemistry, N deposition indirectly changes litter decomposition rates. The direct effects of N deposition on forest litter decomposition range from positive to negative, and the mechanisms are reviewed in this paper. Finally, present and future research about the effects of N deposition on forest litter decomposition are also discussed.
HTML 查看全文   查看/发表评论  下载PDF阅读器

您是本站第 54108860 位访问者

Copyright © 2005-2019   京ICP备06018880号
地址:北京海淀区双清路18号
  邮编:100085    电话:010-62941099
  E-mail : shengtaixuebao@rcees.ac.cn
本系统由北京勤云科技发展有限公司提供技术支持