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修改后的生物炭通过改变土壤pH值和元素固态度来影响沿海盐土中的CO2和N2O排放

Yang Dong¹, Xin Zhang¹, Xiao Wang¹

¹Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China; National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, Dongying 257300, China; Qingdao Key Laboratory of Coastal Saline-alkali Land Resources Mining and Biological Breeding, Qingdao 266101, China.

The Science of the total environment

|September 15, 2024

概括

修饰生物炭 (BCMg) 通过增加pH值和抑制微生物活动,有效地减少沿海盐土中的温室气体排放 (CO2和N2O). 改生物炭 (BCP) 的效果不同,减少N2O,但增加CO2释放.

科学领域:

土壤科学土壤科学
环境科学环境科学
生物地质化学生物地质化学

背景情况:

在退化的农田中应用生物炭可以提高土壤的生产力,并回收农业废物.
沿海盐土有结构上的局限性,降低了生物炭的碳捕获潜力.
经过修改的生物炭 (使用和) 显示出更好的稳定性和增加土壤有机碳的潜力.

研究的目的:

调查修饰生物炭 (BCMg) 和修饰生物炭 (BCP) 对沿海盐土的二氧化碳和二氧化排放的影响.
阐明影响这些温室气体排放的潜在机制.
为了比较BCMg和BCP在减轻排放和改善土壤碳池方面的有效性.

主要方法:

实验室进行了土壤微观宇宙实验.
该研究比较了包括未应用土壤 (CK),未修改生物炭 (BC),BCMg和BCP.在内的处理方法.
测量侧重于CO2和N2O释放,土壤pH值,微生物群体活动和元素石化学.

主要成果:

与CK和BC相比,BCMg显著降低了CO2和N2O排放.
BCP减少了N2O的释放,但增加了CO2的释放.
BCMg提高了土壤pH值超过8.5,减少了微生物活动和产生N2O的细菌,从而降低了CO2和N2O的释放.
作为微生物应对策略,BCP诱导了微生物限,导致CO2增加和N2O生产减少.

结论:

在减轻沿海盐土温室气体排放方面,改制生物炭 (BCMg) 比改制生物炭 (BCP) 更有效.
BCMg的益处归因于土壤pH值的增加,这抑制了微生物的活动.
BCP的效应与土壤固态度的改变和微生物中诱导的限制有关.
改性生物炭为增强碳池和减少沿海盐水土壤温室气体排放提供了一个可行的战略.

关键词:

的二氧化碳排放量.经过修饰的生物炭.微生物社区的微生物社区.排放量为N(2) O的排放量用修饰的生物炭.

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