气候变化领域集成服务门户(CCPortal): Liming effects on microbial carbon use efficiency and its potential consequences for soil organic carbon stocks

CCPortal

DOI	10.1016/j.soilbio.2024.109342
	Liming effects on microbial carbon use efficiency and its potential consequences for soil organic carbon stocks
	Schroeder, Julia; Damatirca, Claudia; Bolscher, Tobias; Chenu, Claire; Elsgaard, Lars; Tebbe, Christoph C.; Skadell, Laura; Poeplau, Christopher
发表日期	2024
ISSN	0038-0717
EISSN	1879-3428
起始页码	191
卷号	191
英文摘要	Climate-smart agriculture aims amongst others at protecting and increasing soil organic carbon (SOC) stocks. The allocation of metabolised carbon (C) between soil microbial growth and respiration, i.e. C use efficiency (CUE) is crucial for SOC dynamics. We hypothesised that raising soil pH would alleviate CUE-limiting conditions and that liming could thus increase CUE, thereby supporting SOC accrual. This study investigated whether CUE can be manipulated by liming and how this might contribute to SOC stock changes. The effects of liming on CUE, microbial biomass C, abundance of microbial domains, SOC stocks and OC inputs were assessed for soils from three European long-term field experiments. Field control soils were additionally limed in the laboratory to assess immediate effects. The shift in soil pHH2O from 4.5 to 7.3 with long-term liming reduced CUE by 40 %, whereas the shift from 5.5 to 8.6 and from 6.5 to 7.8 was associated with increases in CUE by 16 % and 24 %, respectively. The overall relationship between CUE and soil pH followed a U-shaped (i.e. quadratic) curve, implying that in agricultural soils CUE may be lowest at pHH2O = 6.4. The immediate CUE response to liming followed the same trends. Changes in CUE with long-term liming contributed to the net effect of liming on SOC stocks. Our study confirms the value of liming as a management practice for climate-smart agriculture, but demonstrates that it remains difficult to predict the impact on SOC stocks due its complex effects on the C cycle.
英文关键词	Climate change mitigation; Agricultural soil; Organic C inputs; Isotopic labelling; Microbial soil carbon; Long-term field experiment (LTE)
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:001174083000001
来源期刊	SOIL BIOLOGY & BIOCHEMISTRY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300848
作者单位	Johann Heinrich von Thunen Institute; University of Turin; INRAE; Universite Paris Saclay; Universite Paris Cite; AgroParisTech; Aarhus University; Johann Heinrich von Thunen Institute
推荐引用方式 GB/T 7714	Schroeder, Julia,Damatirca, Claudia,Bolscher, Tobias,et al. Liming effects on microbial carbon use efficiency and its potential consequences for soil organic carbon stocks[J],2024,191.
APA	Schroeder, Julia.,Damatirca, Claudia.,Bolscher, Tobias.,Chenu, Claire.,Elsgaard, Lars.,...&Poeplau, Christopher.(2024).Liming effects on microbial carbon use efficiency and its potential consequences for soil organic carbon stocks.SOIL BIOLOGY & BIOCHEMISTRY,191.
MLA	Schroeder, Julia,et al."Liming effects on microbial carbon use efficiency and its potential consequences for soil organic carbon stocks".SOIL BIOLOGY & BIOCHEMISTRY 191(2024).