5300-Year-old soil carbon is less primed than young soil organic matter

doi:10.1111/gcb.16463

	5300-Year-old soil carbon is less primed than young soil organic matter
	Su, Jiao 1; Zhang, Haiyang 2,3; Han, Xingguo1 ; Lv, Ruofei 1; Liu, Li 1; Jiang, Yong 2; Li, Hui 4; Kuzyakov, Yakov 5,6; Wei, Cunzheng 7
	2023
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	29 期号:1 页码:260-275
摘要	Soils harbor more than three times as much carbon (C) as the atmosphere, a large fraction of which (stable organic matter) serves as the most important global C reservoir due to its long residence time. Litter and root inputs bring fresh organic matter (FOM) into the soil and accelerate the turnover of stable C pools, and this phenomenon is termed the priming effect (PE). Compared with knowledge about labile soil C pools, very little is known about the vulnerability of stable C to priming. Using two soils that substantially differed in age (500 and 5300 years before present) and in the degree of chemical recalcitrance and physical protection of soil organic matter (SOM), we showed that leaf litter amendment primed 264% more organic C from the young SOM than from the old soil with very stable C. Hierarchical partitioning analysis confirmed that SOM stability, reflected mainly by available C and aggregate protection of SOM, is the most important predictor of leaf litter-induced PE. The addition of complex FOM (i.e., leaf litter) caused a higher bacterial oligotroph/copiotroph (K-/r-strategists) ratio, leading to a PE that was 583% and 126% greater than when simple FOM (i.e., glucose) was added to the young and old soils, respectively. This implies that the PE intensity depends on the chemical similarity between the primer (here FOM) and SOM. Nitrogen (N) mining existed when N and simple FOM were added (i.e., Glucose+N), and N addition raised the leaf litter-induced PE in the old soil that had low N availability, which was well explained by the microbial stoichiometry. In conclusion, the PE induced by FOM inputs strongly decreases with increasing SOM stability. However, the contribution of stable SOM to CO2 efflux cannot be disregarded due to its huge pool size.
关键词	chemical complexity microbial stoichiometry nitrogen mining organic carbon stability physical protection priming effect
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.16463
收录类别	SCI
语种	英语
WOS关键词	FRESH CARBON ; DECOMPOSITION ; NITROGEN ; TOPSOIL ; STABILITY ; DEEP ; MINERALIZATION ; MECHANISMS ; IMPACTS ; CLIMATE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000868791400001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	National Natural Science Foundation of China [32171601, 42130515] ; RUDN University Strategic Academic Leadership Program
作者邮箱	weicunzheng@ibcas.ac.cn
引用统计	被引频次：27[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/2S10CLM1/29094
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Hebei Univ, Coll Life Sci, Baoding, Peoples R China 4.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia 5.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang, Peoples R China 6.Univ Goettingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, Gottingen, Germany 7.Peoples Friendship Univ Russia RUDN Univ, Moscow, Russia 8.Netherlands Inst Ecol NIOOKNAW, Dept Terr Ecol, Wageningen, Netherlands
推荐引用方式 GB/T 7714	Su, Jiao,Zhang, Haiyang,Han, Xingguo,et al. 5300-Year-old soil carbon is less primed than young soil organic matter[J]. GLOBAL CHANGE BIOLOGY,2023,29(1):260-275.
APA	Su, Jiao.,Zhang, Haiyang.,Han, Xingguo.,Lv, Ruofei.,Liu, Li.,...&Wei, Cunzheng.(2023).5300-Year-old soil carbon is less primed than young soil organic matter.GLOBAL CHANGE BIOLOGY,29(1),260-275.
MLA	Su, Jiao,et al."5300-Year-old soil carbon is less primed than young soil organic matter".GLOBAL CHANGE BIOLOGY 29.1(2023):260-275.

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