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森林土壤氮素转换及其对氮沉降的响应
引用本文:方运霆,莫江明,Per Gundersen,周国逸,李德军.森林土壤氮素转换及其对氮沉降的响应[J].生态学报,2004,24(7):1523-1531.
作者姓名:方运霆  莫江明  Per Gundersen  周国逸  李德军
作者单位:1. 中国科学院华南植物研究所鼎湖山森林生态系统定位研究站,广东,肇庆,526070;中国科学院研究生院,北京,100039
2. 中国科学院华南植物研究所鼎湖山森林生态系统定位研究站,广东,肇庆,526070
3. Forest & Landscape Denmark,Hoersholm Kongevej 11,DK-2970
基金项目:国家自然科学基金项目 ( 3 0 2 70 2 83 ),中国科学院知识创新工程领域前沿项目,中国科学院华南植物研究所所长基金资助项目,广东省自然科学基金资助项目 ( 0 2 15 2 4)~~
摘    要:近几十年人类活动向大气中排放的含氮化合物激增 ,并引起大气氮沉降也成比例增加。目前 ,氮沉降的增加使一些森林生态系统结构和功能发生改变 ,甚至衰退。近 2 0 a欧洲和北美有关氮沉降及其对森林生态系统的影响方面的研究较多 ,而我国少有涉及。森林土壤氮素转换是森林生态系统氮素循环的一个重要的组成部分 ,而矿化、硝化和反硝化作用是其核心过程 ,氮沉降作为驱动因子势必改变森林土壤氮素转换速度、方向和通量。根据国外近 2 0 a有关研究 ,首先介绍了森林土壤氮素转换过程和强度 ,论述森林土壤氮素在生态系统氮素循环中的作用 ,然后在此基础上 ,介绍了氮沉降对森林土壤氮素循环的研究途径 ,探讨了氮沉降对森林土壤氮素矿化、硝化和反硝化作用的影响及其机理

关 键 词:氮沉降  森林土壤  矿化  硝化  反硝化
文章编号:1000-0933(2004)07-1523-09
收稿时间:2003/9/13 0:00:00
修稿时间:2004/4/20 0:00:00

Nitrogen transformations in forest soils and its responses to atmospheric nitrogen deposition: a review
FANG Yunting,MO Jiangming,Per Gundersen,ZHOU Guoyi and LI Dejun.Nitrogen transformations in forest soils and its responses to atmospheric nitrogen deposition: a review[J].Acta Ecologica Sinica,2004,24(7):1523-1531.
Authors:FANG Yunting  MO Jiangming  Per Gundersen  ZHOU Guoyi and LI Dejun
Institution:Dinghushan Forest Ecosystem Research Station; South China Institute of Botany; Chinese Academy of Sciences; Zhaoqing; Guangdong; China
Abstract:Atmospheric nitrogen deposition remains elevated in industrial regions of the world and is accelerating in many developing regions. Chronically elevated atmospheric N inputs to forest can lead to changes in tree growth, mortality, and species composition, and to possible declines 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 atmospheric N in changes observed in water quality and tree health. Recently, the emissions of nitrogenous compounds from industry and agriculture have also been increasing rapidly in China. However, little information about the impacts of nitrogen deposition is available for forest ecosystems in China. Elevated atmospheric nitrogen input, as a driving environmental factor, has altered the nitrogen cycle of forest ecosystems, especially soil nitrogen transformations. In this paper, based on available scientific evidence we reviewed the controlling factors for nitrogen transformations in forest soils and its responses to atmospheric nitrogen deposition. The review mainly includes the following four aspects: (1) the biological processes and magnitudes of nitrogen transformations in forest soils; (2) the roles of nitrogen transformations in nitrogen cycling of forest ecosystems; (3) the current methods for study forest nitrogen transformations; (4) the potential effects and its mechanisms of nitrogen deposition on forest soil nitrogen mineralization, nitrification and denitrification.
Keywords:nitrogen deposition  forest soil  nitrogen mineralization  nitrification  denitrification  
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