长白山阔叶红松林树木N2O排放及总量初步估算

生态学杂志 ›› 2004, Vol. ›› Issue (5): 232-235.

长白山阔叶红松林树木N₂O排放及总量初步估算

张秀君^1,2, 徐慧¹, 陈冠雄¹

1. 中国科学院沈阳应用生态研究所陆地生态过程重点实验室, 沈阳, 110016;
2. 沈阳大学师范学院, 沈阳, 110016

收稿日期:2002-04-28 修回日期:2002-11-02 出版日期:2004-10-10
通讯作者: 徐慧
基金资助:
国家自然科学基金项目(49701016,39770066);中国科学院“百人计划”资助项目

N₂O emission and preliminary estimation of annual N₂O emission from trees in mixed broad-leaved and Korean pine forest of Changbai Mountain

ZHANG Xiujun^1,2, XU Hui¹, CHEN Guanxiong¹

1. Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. Shenyang College of Education, Shenyang 110016, China

Received:2002-04-28 Revised:2002-11-02 Online:2004-10-10

摘要/Abstract

摘要： 大气中主要温室气体N₂O的部分来源尚不清楚。以往国内外对森林生态系统N₂O排放通量的测定中,只测土壤通量而把树木排除在外。如果树木在自然状态下能排放N₂O,那么森林生态系统的N₂O排放可能被低估。本文旨在证明自然状态下森林生态系统中树木也是N₂O的主要排放源。采用封闭罩法,在树木生长的主要季节(7～9月)对长白山阔叶红松林的几个主要树种———水曲柳、红松和椴树的连体枝叶释放N₂O的速率进行了原位测定。并在此基础上,初步估算出森林树木N₂O年排放量是土壤N₂O年排放量的0.8～1.03倍,相当于甚至超过了土壤的N₂O排放量。

关键词: 猪粪, 堆肥, 微生物菌剂, 氨

Abstract: The sources of N₂O ,one of the major greenhouse gases in the atmosphere,are still unclear till now. It was previously considered that only soil microbial process produced N₂O . In previous studies on N₂O emission from forest ecosystems,only measurements of N₂O emission from soil were conducted. The total N₂O emission from forest ecosystem may be underestimated if plants can emit N₂O under natural condition. The aim of this study was to provide evidences that plant per se,besides forest soil,is also an important source of the atmospheric N₂O in a forest ecosystem. Using the closed bag technique,the in situ measurements of N₂O emissions from branches and leaves of Fraxinus mandshurica,Pinnus koraiensis and Tilia amurrensis were conducted in a mixed broad-leaved Korean pine forest. The contribution of N₂O emission from trees in forest ecosystems was firstly estimated based on N₂O emission rates from these three tree species and soil in mixed broad-leaved Korean pine forest. The annual average of N₂O emissions from trees in mixed broad-leaved Korean pine forest was 0.8～1.03 times of that from soil. It was found that N₂O emission from trees were equal to or higher than N₂O emission from forest soil.

Key words: Pig manure, Composting, Microbial agent, NH₃

中图分类号:

Q148

张秀君, 徐慧, 陈冠雄. 长白山阔叶红松林树木N₂O排放及总量初步估算[J]. 生态学杂志, 2004, (5): 232-235.

ZHANG Xiujun, XU Hui, CHEN Guanxiong. N₂O emission and preliminary estimation of annual N₂O emission from trees in mixed broad-leaved and Korean pine forest of Changbai Mountain[J]. cje, 2004, (5): 232-235.

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长白山阔叶红松林树木N₂O排放及总量初步估算

N₂O emission and preliminary estimation of annual N₂O emission from trees in mixed broad-leaved and Korean pine forest of Changbai Mountain

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