Responses of Soil N2O Emission to Litter Removal and Root Removal: A Meta-Analysis

doi:10.13209/j.0479-8023.2023.027

Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2023, Vol. 59 ›› Issue (3): 532-538.DOI: 10.13209/j.0479-8023.2023.027

Responses of Soil N₂O Emission to Litter Removal and Root Removal: A Meta-Analysis

ZHOU Daiyang, FENG Jiguang, ZHU Biao^†

Institute of Ecology, College of Urban and Environmental Sciences, Key Laboratory for Earth Surface Processes (MOE), Peking University, Beijing 100871

Received:2022-06-15 Revised:2022-08-19 Online:2023-05-20 Published:2023-05-20
Contact: ZHU Biao, E-mail: biaozhu(at)pku.edu.cn

凋落物和根系去除对土壤N₂O排放的影响——整合分析

周岱瑒, 冯继广, 朱彪^†

北京大学生态研究中心, 城市与环境学院, 地表过程分析与模拟教育部重点实验室, 北京 100871

通讯作者: 朱彪, E-mail: biaozhu(at)pku.edu.cn
基金资助:
国家自然科学基金基础科学中心项目(31988102)资助

Abstract

Abstract:

Based on litter removal and root removal experiments carried out worldwide, 61 pairs of soil N₂O emission data were obtained, and the effects and regulatory factors of litter removal and root removal on soil N₂O emission were quantitatively evaluated by the meta-analysis approach. The results showed that soil N₂O emission decreased (?16.5%) significantly after removing litters, but increased (+131.6%) significantly after removing roots. The response ratio (RR) of soil N₂O emission was positively correlated with the RR of soil moisture and nitrate nitrogen content under litter and root removal treatments, which suggested that soil moisture and nitrate nitrogen content were the main factors regulating the response of soil N₂O emission to reduced plant inputs. Overall, the results reveal the effects of litter removal and root removal on soil N₂O emission and regulatory factors for such effects, which is helpful to understanding how altered plant inputs will regulate soil N₂O emissions in the context of future global change.

Key words: N₂O, greenhouse gases, detritus input and removal treatments (DIRT), litter removal, root removal; meta-analysis

摘要：

基于全球范围内开展的凋落物去除和根系去除实验, 获取61对土壤N₂O排放数据, 通过整合分析方法, 定量地评估去除凋落物和根系对土壤N₂O排放的影响与调控因素。结果表明, 去除凋落物处理后, 土壤N₂O排放显著降低(?16.5%); 去除根系处理后, 土壤N₂O 排放显著增加(+131.6%)。凋落物和根系去除情况下, N₂O排放的变化与土壤水分和硝态氮含量的变化具有显著的正相关关系, 表明土壤水分和硝态氮含量的变化是土壤N₂O排放响应植物输入降低的主要调控因素。研究结果揭示了凋落物去除和根系去除对土壤N₂O排放的影响与调控因素, 有利于理解未来全球变化背景下植物输入的改变如何影响土壤N₂O的排放。

关键词: 氧化亚氮, 温室气体, 植物残体输入和去除实验, 凋落物去除, 根系去除, 整合分析

ZHOU Daiyang, FENG Jiguang, ZHU Biao. Responses of Soil N₂O Emission to Litter Removal and Root Removal: A Meta-Analysis[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2023, 59(3): 532-538.

周岱瑒, 冯继广, 朱彪. 凋落物和根系去除对土壤N₂O排放的影响——整合分析[J]. 北京大学学报自然科学版, 2023, 59(3): 532-538.

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URL: https://xbna.pku.edu.cn/EN/10.13209/j.0479-8023.2023.027

https://xbna.pku.edu.cn/EN/Y2023/V59/I3/532

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Responses of Soil N₂O Emission to Litter Removal and Root Removal: A Meta-Analysis

凋落物和根系去除对土壤N₂O排放的影响——整合分析

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