自然资源学报 ›› 2014, Vol. 29 ›› Issue (9): 1565-1575.doi: 10.11849/zrzyxb.2014.09.011

• 资源评价 • 上一篇    下一篇

大兴安岭地区岛状林沼泽CH4和N2O排放及其影响因子

刘霞1,2, 胡海清1, 赵希宽2, 黄超2, 王黑子来2, 孙龙1, 孙程坤3   

  1. 1. 东北林业大学林学院, 哈尔滨150040;
    2. 大兴安岭地区农林科学院嫩江源森林生态系统定位观测研究站, 黑龙江加格达奇165000;
    3. 大兴安岭地区营林局, 黑龙江加格达奇165000
  • 收稿日期:2013-03-11 修回日期:2014-01-19 出版日期:2014-09-20 发布日期:2014-09-20
  • 通讯作者: 胡海清,E-mail:huhq-cf@nefu.edu.cn E-mail:huhq-cf@nefu.edu.cn
  • 作者简介:刘霞(1980-),女,工程师,博士研究生,主要从事湿地、生态系统碳循环及森林防火相关科研工作。E-mail:kekoukele421@163.com
  • 基金资助:

    国家自然科学基金项目(31070544);黑龙江省科技攻关重点项目(GA09B201-06)。

Emissions of CH4 and N2O from Island Forested Swampin Da Hinggan Mountains

LIU Xia1,2, HU Hai-qing1, ZHAO Xi-kuan2, HUANG Chao2, WANG Heizilai2, SUN Long1, SUN Cheng-kun3   

  1. 1. College of Forestry, Northeast Forestry University, Harbin 150040, China;
    2. Forestry and Agriculture of Academy in the Da Hinggan Mountains, Nenjiangyuan Forest Ecosystem Research Station, Jiagedaqi 165000, China;
    3. Bureau of Forestry in the Da Hinggan Mountains, Jiagedaqi 165000, China
  • Received:2013-03-11 Revised:2014-01-19 Online:2014-09-20 Published:2014-09-20

摘要:

沼泽湿地CH4、N2O的排放,尤其是高纬度沼泽湿地,对于评估北半球温室气体排放具有重要意义。在2011 年生长季利用野外静态箱-气相色谱法对大兴安岭地区两种典型湿地岛状林沼泽(白桦和兴安落叶松岛状林沼泽)CH4、N2O排放通量进行了研究,分析CH4、N2O排放通量的季节特征,并探讨温度、水位主控因子对CH4、N2O排放通量的影响。结果表明:①生长季白桦(Betula platyphylla)和兴安落叶松(Larix gmelinii)岛状林沼泽CH4通量除春季白桦岛状林沼泽出现排放峰值外,两样地CH4都处于弱吸收现象;N2O排放高峰期分别在初夏、春两季。白桦和兴安落叶松岛状林沼泽CH4、N2O 排放通量依次为-60.61、-93.21 μg·m-2 ·h-1 和82.92、 45.06 μg·m-2 ·h-1。②兴安落叶松岛状林沼泽生长季CH4、N2O 排放通量分别与10~40 cm 和 15~40 cm土壤温度呈显著负相关性;而白桦岛状林沼泽CH4排放通量仅与40 cm土壤温度呈显著负相关,两种类型沼泽均与土壤含水率未呈显著相关性。③白桦和兴安落叶松岛状林沼泽生长季CH4、N2O总通量分别为-2.21、-2.74 kg·hm-2和2.74、0.93 kg·hm-2;表现为大气CH4弱吸收的汇,N2O弱排放的源。

关键词: 岛状林沼泽, 大兴安岭, CH4、N2O

Abstract:

Emissions of CH4 and N2O in swamps especially at high latitudes are significant toevaluate greenhouse gases emissions at the northern latitudes. During the growing season of2011, using a static opaque chamber-GC technique, we researched CH4 and N2O emission fluxesin two typical island-forested swamps (Betula platyphylla-Carex schmidtii swamp and Larixgmelinii-Carex schmidtii swamp) in Da Hinggan Mountains of China, analyzed the seasonal characteristics of CH4 and N2O fluxes, and investigated the influences from temperature and watermaster factors to the emission fluxes. The results showed that: CH4 was in weak absorption during growing season in both B. platyphylla-C. schmidtii swamp and Larix gmelinii-Carex schmidtiiswamp except that CH4 fluxes had emission peaks in spring; while N2O emissionpeaks appeared in early summer and spring in two swamps. The average emission fluxes were -60.61,-93.21 μg·m-2·h-1 and 82.92, 45.06 μg· m-2·h-1 respectively. CH4 and N2O emissionfluxes during growing season in L. gmelinii-C. schmidtii swamp were in negative correlationwith 10-40 cm and 15-40 cm soil temperatures respectively; while CH4 and N2O emissionfluxes during growing season in B. platyphylla-C. schmidtii swamp were only in negative correlationwith 40 cm soil temperature. Neither two types of swamp and soil water ratio had approachedstrong correlations. CH4 and N2O emission fluxes during growing seasonwere-2.21,-2.74 kg·hm-2 and 2.74, 0.93 kg·hm-2 respectively in B. platyphylla-C. schmidtii swamp and L. gmelinii-C. schmidtii swamp, which became the sinks of CH4 weak absorptionand the sources of N2O weak emission.

Key words: broadleaved forested swamps, Da Hinggan Mountains, CH4 and N2O

中图分类号: 

  • Q948.1