微生物多样性损失对农田土壤CO2和N2O排放功能稳定性的影响

doi:10.13287/j.1001-9332.202305.030

应用生态学报 ›› 2023, Vol. 34 ›› Issue (5): 1313-1319.doi: 10.13287/j.1001-9332.202305.030

微生物多样性损失对农田土壤CO₂和N₂O排放功能稳定性的影响

钱刘兵¹, 梁山峰¹, 魏占波², 张彬^1*

¹南京信息工程大学应用气象学院, 南京 210044;
²中国科学院沈阳应用生态研究所, 沈阳 110016

收稿日期:2022-12-20 接受日期:2023-02-23 出版日期:2023-05-15 发布日期:2023-11-15
通讯作者: *E-mail: bzhang@nuist.edu.cn
作者简介:钱刘兵, 女, 2002年生, 本科生。E-mail: 1627866448@qq.com
基金资助:
南京信息工程大学人才启动基金项目(2018r101)

Effects of microbial diversity loss on the stability of CO₂ production and N₂O emission in agricultural soils

QIAN Liubing¹, LIANG Shanfeng¹, WEI Zhanbo², ZHANG Bin^1*

¹School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;
²Institute of Applied Ecology, Chinese Aca-demy of Sciences, Shenyang 110016, China

Received:2022-12-20 Accepted:2023-02-23 Online:2023-05-15 Published:2023-11-15

摘要/Abstract

摘要： 生物多样性与生态系统稳定性的关系一直是生态学领域的研究热点,然而已有研究主要关注地上植物系统,对地下土壤系统尚不够重视。本研究通过逐步稀释法获得3种微生物多样性不同的土壤悬液(10⁰、10^-2、10^-6),重新接种后考察农田黑土与红壤CO₂和N₂O排放功能在铜污染和热胁迫下的稳定性(用抵抗力和恢复力来表征)。结果表明:黑土CO₂排放的功能稳定性在不同微生物多样性处理下没有差异,N₂O排放对铜污染和热胁迫的抵抗力和恢复力均在10^-6多样性处理下发生明显下降;红壤N₂O排放对铜污染和热胁迫的抵抗力和恢复力在10^-2多样性处理下开始显著下降,而CO₂排放的功能稳定性在10^-6多样性处理下显著下降。说明微生物多样性损失对农田土壤功能稳定性的影响会因土壤类型和所选取的土壤功能而不同,当土壤养分含量较高、微生物群落中耐胁迫种类较多时,土壤CO₂和N₂O排放的功能稳定性相对较高;环境干扰后土壤的一般性或广谱性功能(如CO₂排放)的稳定性要显著高于特殊性或专一性功能(如N₂O排放)。

关键词: 逐步稀释, 抵抗力, 恢复力, CO₂排放, N₂O排放

Abstract: The relationship between biodiversity and ecosystem stability is a hot topic in ecology. However, current studies focus mainly on aboveground system with plants, little attention has been paid to belowground system with soils. In this study, we constructed three soil suspensions with varying microbial diversity (10⁰, 10^-2, 10^-6) by the dilution method and inoculated separately into agricultural Mollisols and Oxisols to examine the stability (indicated by resistance and resilience) of soil CO₂ production and N₂O emission to copper pollution and heat stress. Results showed that the stability of CO₂ production in Mollisols was not influenced by microbial diversity loss, while the resistance and resilience of N₂O emission in Mollisols were significantly decreased at the 10^-6 diversity. In the Oxisols, the resistance and resilience of N₂O emission to copper pollution and heat stress started to decrease even at the 10^-2 diversity, and the stability of CO₂ production decreased at the 10^-6 diversity. These results suggested that both soil types and the identity of soil functions influenced the relationship between microbial diversity and the stability of function. It was concluded that soils with ample nutrients and resistant microbial communities tend to have higher functional stability, and that the fundamental soil functions (e.g., CO₂ production) are more resistant and resilient than the specific soil functions (e.g., N₂O emission) in response to environmental stress.

Key words: serial dilution, resistance, resilience, CO₂ production, N₂O emission

钱刘兵, 梁山峰, 魏占波, 张彬. 微生物多样性损失对农田土壤CO₂和N₂O排放功能稳定性的影响[J]. 应用生态学报, 2023, 34(5): 1313-1319.

QIAN Liubing, LIANG Shanfeng, WEI Zhanbo, ZHANG Bin. Effects of microbial diversity loss on the stability of CO₂ production and N₂O emission in agricultural soils[J]. Chinese Journal of Applied Ecology, 2023, 34(5): 1313-1319.

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微生物多样性损失对农田土壤CO₂和N₂O排放功能稳定性的影响

Effects of microbial diversity loss on the stability of CO₂ production and N₂O emission in agricultural soils

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