Acta Agrestia Sinica ›› 2021, Vol. 29 ›› Issue (10): 2294-2302.DOI: 10.11733/j.issn.1007-0435.2021.10.021

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Research on the Characteristics and Impact Factors of Greenhouse Gas Fluxes in Alpine Soils of Southern China under Three Land Use Patterns

ZHUANG Yuan1,2, YAN Rui-rui1, XIONG Jun-bo3, LIU Yang3, CHEN Ya-nan2, YANG Pei-zhi2, HU Tian-ming2, XIN Xiao-ping1   

  1. 1. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2. College of Prataculture and Grassland, Northwest A&F University, Yangling, Shaanxi Provience 712100, China;
    3. Institute of Animal Husbandry and Veterinary Medicine, Hubei Academy of Agricultural Sciences, Wuhan, Hubei Provience 430000, China
  • Received:2021-06-30 Online:2021-10-15 Published:2021-11-05

三种土地利用方式下南方高山土壤温室气体通量特征及其影响因子研究

庄媛1,2, 闫瑞瑞1, 熊军波3, 刘洋3, 陈亚男2, 杨培志2, 呼天明2, 辛晓平1   

  1. 1. 中国农业科学院农业资源与农业区划研究所, 北京 100081;
    2. 西北农林科技大学草业与草原学院, 陕西 杨凌 712100;
    3. 湖北省农业科学院畜牧兽医研究所, 湖北 武汉 430000
  • 通讯作者: 辛晓平,E-mail:xinxiaoping@caas.cn
  • 作者简介:庄媛(1995-),女,汉,陕西榆林人,硕士研究生,主要从事草地生态研究,E-mail:2019056073@nwafu.edu.cn
  • 基金资助:
    国家重点研发计划项目:草地碳收支监测评估技术合作研究(2017YFE0104500)资助;国家重点研发计划(2016YFC0500600)资助;国家自然科学基金“基于全生命周期分析的多尺度草甸草原经营景观碳收支研究”(41771205)资助;财政部和农业农村部:国家现代农业产业技术体系;草地农业生态系统国家重点实验室开放课题(SKLGAE-2019-07)资助

Abstract: To investigate the characteristics and impact factors of soil greenhouse gas emission under three land use patterns in Huohuping, Hubei Province, the farmland, grassland and natural forest land were taken as the research objects, static chamber-gas chromatographic techniques was used to monitor the soil greenhouse gas flux, and the environmental factors were analyzed in three land use patterns of Huoshaoping, Hubei. The results showed that:soil CO2 emissions was observed under the three land use patterns, CH4 and N2O were emitted in farmland, were absorbed in grassland, and were inconsistent in woodland. Soil water content inhibits CO2 and promotes CH4 emissions. Catalase activity had a significant correlation with CO2 and CH4 emissions. The application of organic fertilizers affects N2O emissions. The Global warming potential (GWP) from large to small showed (grassland > woodland > farmland). However, grassland has high photosynthetic respiration due to high biomass, the total amount of net CO2 emissions in grassland was lower. Therefore, the construction of artificial grassland is conducive to reduce soil greenhouse gas emissions in the study area.

Key words: Land use pattern, Greenhouse gas, Impact factor, Global warming potential

摘要: 为探讨湖北火烧坪三种土地利用方式下土壤温室气体排放的特征及其影响因子,以研究区农田、草地和天然林地为研究对象,采用野外原位静态箱-气相色谱法对其土壤温室气体通量动态变化进行监测,并对环境因子进行分析。结果表明:三种土地利用方式下土壤CO2均表现为排放,农田土壤CH4和N2O表现为排放,草地表现为吸收,林地不一致;土壤含水量抑制土壤CO2,促进土壤CH4产生,过氧化氢酶活性与土壤CO2和CH4的排放具有显著相关性,有机肥的施用影响土壤N2O的排放;全球增温潜势(Global warming potential,GWP)由大到小表现为草地 > 林地 > 农田,但草地由于生物量高光合呼吸作用强,向大气排放CO2的总量则较低。因此,人工草地的建造有利于降低研究区土壤温室气体的排放。

关键词: 利用方式, 温室气体, 影响因子, 全球增温潜势

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