Acta Agrestia Sinica ›› 2022, Vol. 30 ›› Issue (11): 2875-2883.DOI: 10.11733/j.issn.1007-0435.2022.11.004

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A Global Analysis of the Designs and Methods Among Nitrogen Addition Experiments

JIANG Liang-chao1,2,3, NING Qiu-shi4, WANG Jin-song1, WANG Jing-yuan1, ZHANG Jin-xin5, TIAN Da-shuan1,6   

  1. 1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, CAS, Beijing 100093, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China;
    4. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
    5. Institute of ecological protection and restoration, Chinese Academy of Forestry Sciences, Beijing 100091, China;
    6. Department of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2022-05-01 Revised:2022-07-29 Published:2022-12-02

全球氮添加实验设计方法现状的定量分析

姜良超1,2,3, 宁秋实4, 汪金松1, 王晶苑1, 张金鑫5, 田大栓1,6   

  1. 1. 中国科学院地理科学与资源研究所生态网络观测与模拟重点实验室, 北京 100101;
    2. 中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093;
    3. 中国科学院大学, 北京 100049;
    4. 中国科学院生态环境研究中心城市与区域生态国家重点实验室, 北京 100085;
    5. 中国林业科学研究院生态保护与修复研究所, 北京 100091;
    6. 中国科学院大学 资源与环境学院, 北京 100049
  • 通讯作者: 田大栓,E-mail:tiands@igsnrr.ac.cn
  • 作者简介:姜良超(1990-),男,汉族,山东临沂人,博士,主要从事草地碳氮循环研究,E-mail:jianglc@ibcas.ac.cn
  • 基金资助:
    国家重点研发计划资助(2017YFA0604802);可桢-秉维青年人才计划(2020RC003);中国科学院青年创新促进会会员(2021050);中国科学院生态环境研究中心城市与区域环境国家重点实验室开放基金(SKLURE2021-2-1)资助

Abstract: Nitrogen (N) addition experiment is one of the effective measures for assessing the effects of N deposition on terrestrial ecosystems. Though hundreds of N addition experiments have been conducted during the last decades,the differences of methods could cause large uncertainty for the comparison among the study results and global meta-analysis. Thus,we collected 302 N addition experiments in terrestrial ecosystems and performed a global analysis of their methods. Our results showed that only 8% of N addition experiments were conducted in tundra,wetland and desert ecosystems. Experiments implemented below the N rate of 2 g N·m-2·a-1 made up 4.4% and 17.5% for those solely using NH+4 or NO-3 form fertilizer. 13.6% for experimental duration above 20 years,and 5.1% for those with more than 4 levels of N addition. Based on these results,we presented some suggestions for the design and the methodoly of future N addition experiments.

Key words: Nitrogen addition experiment, Experimental design, Experimental method among nitrogen addition, Meta-analysis, Nitrogen deposition

摘要: 氮添加控制实验是研究全球氮沉降对陆地生态系统影响的最有效手段之一。目前数百个氮添加实验由于其实验设计和方法的差异给不同实验结果之间的比较以及全球数据整合分析带来很大的不确定性。我们搜集全球302个氮添加控制实验,并定量分析其实验设计方法和现状,发现全球氮添加控制实验中仅有8%的实验数量分布于苔原、湿地和荒漠;氮添加量低于2g·m-2·a-1的实验仅占到4.4%;单独使用NH+4或NO-3态肥料的实验占17.5%;超过每年6次氮添加的实验数量仅占1.4%;氮添加实验持续时间基本小于5年,大于20年的实验占13.6%;全球84.9%的实验中氮添加水平数目在2个以内,4个以上的实验仅占5.1%。针对目前氮添加实验的设计方法和现状,我们对未来氮添加实验设计和方法提出了参考建议。

关键词: 氮添加控制实验, 实验设计, 氮添加实验方法, 整合分析, 氮沉降

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