气候变化领域集成服务门户(CCPortal): Shining a Light on How Soil Organic Carbon Behaves at Fine Scales under Long-Term Elevated CO2: An 8 Year Free-Air Carbon Dioxide Enrichment Study

CCPortal

DOI	10.1021/acs.est.3c10680
	Shining a Light on How Soil Organic Carbon Behaves at Fine Scales under Long-Term Elevated CO2: An 8 Year Free-Air Carbon Dioxide Enrichment Study
	Weng, Zhe H.; Kopittke, Peter M.; Schweizer, Steffen; Jin, Jian; Armstrong, Roger; Rose, Michael; Zheng, Yunyun; Franks, Ashley; Tang, Caixian
发表日期	2024
ISSN	0013-936X
EISSN	1520-5851
起始页码	58
结束页码	20
卷号	58 期号:20
英文摘要	Building and protecting soil organic carbon (SOC) are critical to agricultural productivity, soil health, and climate change mitigation. We aim to understand how mechanisms at the organo-mineral interfaces influence SOC persistence in three contrasting soils (Luvisol, Vertisol, and Calcisol) under long-term free air CO2 enrichment conditions. A continuous wheat-field pea-canola rotation was maintained. For the first time, we provided evidence to a novel notion that persistent SOC is molecularly simple even under elevated CO2 conditions. We found that the elevated CO2 condition did not change the total SOC content or C forms compared with the soils under ambient CO2 as identified by synchrotron-based soft X-ray analyses. Furthermore, synchrotron-based infrared microspectroscopy confirmed a two-dimensional microscale distribution of similar and less diverse C forms in intact microaggregates under long-term elevated CO2 conditions. Strong correlations between the distribution of C forms and O-H groups of clays can explain the steady state of the total SOC content. However, the correlations between C forms and clay minerals were weakened in the coarse-textured Calcisol under long-term elevated CO2. Our findings suggested that we should emphasize identifying management practices that increase the physical protection of SOC instead of increasing complexity of C. Such information is valuable in developing more accurate C prediction models under elevated CO2 conditions and shift our thinking in developing management practices for maintaining and building SOC for better soil fertility and future environmental sustainability.
英文关键词	SoilFACE; in situ analysis; functional diversity; spatial heterogeneity; NEXAFS; synchrotronIRM; dryland cropping; soil type
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:001225203300001
来源期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299911
作者单位	La Trobe University; University of Queensland; University of Adelaide; Technical University of Munich; NSW Department of Primary Industries; La Trobe University; La Trobe University
推荐引用方式 GB/T 7714	Weng, Zhe H.,Kopittke, Peter M.,Schweizer, Steffen,et al. Shining a Light on How Soil Organic Carbon Behaves at Fine Scales under Long-Term Elevated CO2: An 8 Year Free-Air Carbon Dioxide Enrichment Study[J],2024,58(20).
APA	Weng, Zhe H..,Kopittke, Peter M..,Schweizer, Steffen.,Jin, Jian.,Armstrong, Roger.,...&Tang, Caixian.(2024).Shining a Light on How Soil Organic Carbon Behaves at Fine Scales under Long-Term Elevated CO2: An 8 Year Free-Air Carbon Dioxide Enrichment Study.ENVIRONMENTAL SCIENCE & TECHNOLOGY,58(20).
MLA	Weng, Zhe H.,et al."Shining a Light on How Soil Organic Carbon Behaves at Fine Scales under Long-Term Elevated CO2: An 8 Year Free-Air Carbon Dioxide Enrichment Study".ENVIRONMENTAL SCIENCE & TECHNOLOGY 58.20(2024).