干旱区生态环境知识资源中心(Arid): Continuous straw returning enhances the carbon sequestration potential of soil aggregates by altering the quality and stability of organic carbon

Arid

DOI	10.1016/j.jenvman.2024.120903
	Continuous straw returning enhances the carbon sequestration potential of soil aggregates by altering the quality and stability of organic carbon
	Zhang, Jun; Zhang, Fenghua; Yang, Lei
通讯作者	Zhang, FH
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2024
卷号	358
英文摘要	Soil structure plays an important role in organic carbon (OC) sequestration, thereby influencing soil fertility and changes in global climate. However, aggregate OC chemical structure changes due to long-term return of straw in oasis farmland of arid northwest China remains unclear. This study conducted 0-, 5-, 10-, 15-, and 20-year straw returning experiments during which three soil components where measured: (1) the functional carbon (C) pool and macroaggregates; (2) microaggregates and silt + clay; (3) the chemical structure of soil OC (SOC). The results demonstrated that in comparison with the control, straw return increased SOC, particulate OC (POC), and mineral-associated OC (MAOC) by 21.90%-63.51%, 5.00%-31.00%, and 46.00%-226.00%, respectively. With increasing duration of straw return, microaggregates transitioned to macroaggregates, and percentages of soil macroaggregates under 10-year straw return increased by 20.26%, 3.39%, 4.40%, and 11.12% compared with that under 0-, 5-, 15- and 20-year straw return, respectively. Soil geometric mean diameter (GMD) and mean weight diameter (MWD) first increased and then decreased, with maximum values after 10-year straw return at 1.20 mm and 1.63 mm, respectively. Solid state 13C NMR (Nuclear Magnetic Resonance) indicated O-alkyl C to be the dominant chemical component of soil OC over different years of straw return. There were increases in aromatic C, aromaticity, and hydrophobicity up to 10-year straw return, after which they decreased. A mantel test confirmed positive correlations of the distributions of macroaggregates, microaggregates, OC of macroaggregates, and silt + clay with MWD and GMD, whereas the OC content of aggregates was positively correlated with O-OA and hydrophobicity. Long-term straw returns improved soil structure and stabilized soil OC, thereby facilitating soil sequestration of OC.
英文关键词	Straw returning Functional carbon pool Aggregate-associated organic carbon Functional groups Soil organic carbon stability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001296309100001
WOS关键词	LONG-TERM FERTILIZATION ; NITROGEN MINERALIZATION ; MATTER FRACTIONS ; MECHANISMS ; MANURE ; PLANT ; MANAGEMENT ; RESIDUES ; INCREASE ; C-13
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404467
推荐引用方式 GB/T 7714	Zhang, Jun,Zhang, Fenghua,Yang, Lei. Continuous straw returning enhances the carbon sequestration potential of soil aggregates by altering the quality and stability of organic carbon[J],2024,358.
APA	Zhang, Jun,Zhang, Fenghua,&Yang, Lei.(2024).Continuous straw returning enhances the carbon sequestration potential of soil aggregates by altering the quality and stability of organic carbon.JOURNAL OF ENVIRONMENTAL MANAGEMENT,358.
MLA	Zhang, Jun,et al."Continuous straw returning enhances the carbon sequestration potential of soil aggregates by altering the quality and stability of organic carbon".JOURNAL OF ENVIRONMENTAL MANAGEMENT 358(2024).