[1]王 霞,杜岩功*,郭小伟.Meta分析模拟氮沉降对我国北方草地氧化亚氮排放速率的影响[J].山地学报,2021,(3):338-345.[doi:10.16089/j.cnki.1008-2786.000600]
　WANG Xia,DU Yangong*,GUO Xiaowei.Effect of Nitrogen Deposition on Grasslands Nitrous Oxide Emission Rates by Meta-Analysis Method[J].Mountain Research,2021,(3):338-345.[doi:10.16089/j.cnki.1008-2786.000600]
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Meta分析模拟氮沉降对我国北方草地氧化亚氮排放速率的影响()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2021年第3期
页码:
338-345
栏目:
山地环境
出版日期:
2021-05-25

文章信息/Info

Title:
Effect of Nitrogen Deposition on Grasslands Nitrous Oxide Emission Rates by Meta-Analysis Method
文章编号:
1008-2786-(2021)3-338-8
作者:
王 霞1;  杜岩功2*;  郭小伟2
1. 莱芜职业技术学院 园林工程技术教研室, 山东 莱芜 271100; 2. 中国科学院西北高原生物研究所, 西宁810001
Author(s):
WANG Xia1;  DU Yangong2*;  GUO Xiaowei2
1. Laiwu Vocational and Technical College, garden engineering division, Laiwu 271100,Shandong, China; 2. Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining 810008, China
关键词:
氮沉降;  Meta分析;  草地生态系统;  随机效应模型;  平均效应值
Keywords:
nitrogen deposition;  Meta-analysis;  grasslands ecosystem;  random effect model;  effect size
分类号:
Q148
DOI:
10.16089/j.cnki.1008-2786.000600
文献标志码:
A
摘要:
氧化亚氮(N2O)是三大温室气体之一,氮沉降显著提高土壤氮素供给水平,可能会大幅增加草地生态系统N2O排放速率。北方草地是我国重要的生态安全屏障和畜牧业基地,但目前有关氮沉降对我国北方草地生态系统N2O排放速率的影响强度及主要调控因素尚不清楚。本研究采用Meta方法,通过对中国北方草地已开展的32个实验结果进行综合分析。结果发现:模拟氮沉降对中国草地生态系统N2O排放的平均效应值为0.82 ± 0.11(95%置信区间0.61～1.02),氮沉降极显著地增加了我国草地N2O排放速率(P <0.001)。不同氮素类型对平均效应值存在显著性影响,顺序依次为硫酸铵、尿素、硝酸钠、硝酸铵、家畜尿液。施用氮素剂量、土壤有机碳含量、气温和海拔对平均效应值均具有显著性影响,氮素剂量和土壤有机质含量可以解释效应值变异的47.31%和45.27%。氮沉降的平均效应值与氮素剂量和气温之间存在极显著正相关关系,而与土壤有机碳和海拔间存在极显著负相关关系。通过对退化草地的恢复治理、提高土壤有机碳含量可大幅降低氮沉降对我国草地生态系统N2O排放的激发效应。
Abstract:
The increase of greenhouse gas concentrations has become a critical situation in global warming. Nitrous oxide(N2O)is one of the three primary greenhouse gases. Nitrogen deposition changes the characteristics of soil microbial communities and affects the N2O emission rate. Northern grassland plays a vital role in ecological security barriers and animal husbandry in China. However, the effect of nitrogen deposition on N2O emission rates and its regulatory factors are still unclear. In this study, 32 grasslands' experimental results were analyzed using Meta-analysis method. The results indicate that the average effect size was approximately 0.82 ± 0.11(95% confidence interval 0.61～1.0)for simulated nitrogen deposition on N2O emission rates(P<0.001). Different nitrogen types significantly affected the average effect size, with a high-to-low order high of ammonium sulfate, urea, sodium nitrate, ammonium nitrate, and livestock urine. Nitrogen dosage, soil organic carbon, air temperature, and altitude had significant effects on the average effect size. Furthermore, the effect size variation of 47.31% and 45.27% could be explained by nitrogen dosage and soil organic matter content, respectively. There was a significant positive correlation between effect size, nitrogen dosage, and air temperature. Furthermore, a significant negative correlation was revealed between the average effect size, soil organic carbon, and altitude. In addition, the grasslands nitrogen deposition effect on N2O emission may be significantly reduced by increasing soil organic carbon content through grassland adaptive management measures.

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备注/Memo

备注/Memo:
收稿日期(Received date):2020-07-27; 改回日期(Accepted date): 2021-04-05
基金项目(Foundation item):国家自然科学基金(31770532); 中国科学院西部之光西部青年学者项目 [National Natural Science Foundation of China(31770532); Youth Scholar Project of Western Light of Chinese Academy of Sciences]
作者简介(Biography):王霞(1982-), 女, 山东淄博人, 硕士, 讲师, 主要研究方向:草地生态系统氮素循环及其环境效应。[WANG Xia(1982-), female, born in Zibo, Shandong province, M.Sc., lecturer, researched on grassland nitrogen cycling and its environment effects] E-mail: 825252@163.com
*通讯作者(Corresponding author):杜岩功(1981-), 男, 博士, 研究员, 主要研究方向:草地生态系统与全球变化。 [DU Yangong(1981-), male, Ph.D., professor, specialized in grasslands ecosystems and global change] E-mail:ygdu@nwipb.cas.cn
更新日期/Last Update: 2021-05-30