Dynamics of soil aggregate-associated carbon as influenced by simulated tillage and runoff

doi:10.1002/saj2.20460

	Dynamics of soil aggregate-associated carbon as influenced by simulated tillage and runoff
	Li, Lu 1; Wang, Enheng ; Cao, Wei ; Zhao, Pengzhi 2; Lin, Lin 3; Zhai, Guoqing 4; Cruse, Richard M.
	2022
发表期刊	SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
ISSN	0361-5995
卷号	86 期号:6 页码:1457-1469
摘要	Tillage practices and water erosion are the most important anthropogenic and natural processes, respectively, driving soil organic C turnover in agricultural land. The aim of this study was to explore the responses of soil organic C (SOC) turnover to tillage and runoff by comparing the variation of soil aggregate-associated organic C (AOC) and intra-aggregate particulate organic C (iPOC) under simulated tillage and runoff conditions. Soil samples were collected from a native vegetation land with no cultivation history in the Mollisol region of Northeast China. After a series of simulated tillage (ST) and simulated runoff (SR) treatments, the samples were incubated for 30 d and then separated through 2-, 1-, 0.25-, and 0.053-mm sieves by wet-sieving to obtain different aggregate size fractions. Each aggregate fraction was subsequently shaken for 18 h in 0.5% hexametaphosphate to get different intra-aggregate particle size fractions. The proportion of the fractions and their AOC and iPOC were determined. The ST treatment promoted the reaggregation of macroaggregates (>2 mm) by accelerating the turnover of their coarse iPOC (0.25-2 mm), leading to a lower concentration of AOC. Runoff transformed larger aggregates (>0.25 mm) to smaller particles (<0.25 mm) without catalyzing C turnover. Fine iPOC (0.053-0.25 mm) could serve as an indicator for AOC (>1 mm) dynamics, especially associated with tillage operations. Our findings highlight the different influences of tillage and runoff, and the negative effect of tillage on SOC dynamics.
学科领域	Soil Science
DOI	10.1002/saj2.20460
收录类别	SCI
语种	英语
WOS关键词	PARTICULATE ORGANIC-MATTER ; RARE-EARTH-OXIDES ; EROSION ; TURNOVER ; STORAGE ; SEQUESTRATION ; STABILIZATION ; DECOMPOSITION ; INFORMATION ; TEMPERATURE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000846831200001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1435-0661
资助机构	National Key R&D Program of China - Ministry of Science and Technology of the People's Republic of China [2021YFD1500600, 2021YFD1500705]
作者邮箱	enheng_wang@nefu.edu.cn
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28505
专题	植被与环境变化国家重点实验室
作者单位	1.Northeast Forestry Univ, Coll Forestry, Harbin 150040, Peoples R China 2.Univ Basel, Dept Environm Sci, CH-4056 Basel, Switzerland 3.UCLouvain, Earth & Life Inst, Georges Lemaitre Ctr Earth & Climate Res, B-1348 Louvain, Belgium 4.Univ Ghent, Dept Environm Soil Phys Units, B-9000 Ghent, Belgium 5.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 6.Cruse, Richard M.] Iowa State Univ, Dept Agron, Ames, IA 50011 USA
推荐引用方式 GB/T 7714	Li, Lu,Wang, Enheng,Cao, Wei,et al. Dynamics of soil aggregate-associated carbon as influenced by simulated tillage and runoff[J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,2022,86(6):1457-1469.
APA	Li, Lu.,Wang, Enheng.,Cao, Wei.,Zhao, Pengzhi.,Lin, Lin.,...&Cruse, Richard M..(2022).Dynamics of soil aggregate-associated carbon as influenced by simulated tillage and runoff.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,86(6),1457-1469.
MLA	Li, Lu,et al."Dynamics of soil aggregate-associated carbon as influenced by simulated tillage and runoff".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 86.6(2022):1457-1469.

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