Nitrogen input level modulates straw-derived organic carbon physical fractions accumulation by stimulating specific fungal groups during decomposition

doi:10.1016/j.still.2022.105560

	Nitrogen input level modulates straw-derived organic carbon physical fractions accumulation by stimulating specific fungal groups during decomposition
	Duan, Yan 3,4; Chen, Lin 3; Li, Yumei 1; Li, Jiangye 2; Zhang, Congzhi 3; Ma, Donghao 3; Zhou, Guixiang 3; Zhang, Jiabao 3,4
刊名	SOIL & TILLAGE RESEARCH
	2023
卷号	225
关键词	Straw decomposition Nutrient inputs Soil organic carbon Microbial community Chaetomium globosum
ISSN号	0167-1987
DOI	10.1016/j.still.2022.105560
通讯作者	Zhang, Jiabao(jbzhang@issas.ac.cn)
英文摘要	Microbial-driven straw-derived soil organic carbon (SOC) sequestration plays pivotal role in promoting soil productivity and achieving C neutrality, while nitrogen (N) and phosphorus (P) input levels are the impetus of this process. However, our understanding of the microbial mechanism underpinning the straw-derived SOC fractions accumulation within aggregates under contrasting N and P application rates is rudimentary. Here, a 90 -day incubation experiment was conducted to observe the dynamics of straw-derived SOC fractions accumulation within aggregates by adding C3 straw (natural 13C-labeled substrate) to a Mollisol (in which C3 plants had never been grown). Treatments included straw combinations of half N and regular P (N1/2 +P + SR), regular N and half P (N + P1/2 +SR) and regular N and P (N + P + SR). Regular N input accelerated the succession of the microbial community from bacteria-dominated to fungi-dominated and increased the contents of straw-derived particulate OC (POC) at 10 days and mineral-associated OC (MOC) at 30 days within aggregates. Differential abundance analysis and slopes of linear regression models showed that the fungal community, especially the core enriched taxon of Chaetomiaceae, was strongly positively correlated with straw-derived MOC after N input. Random forest models strengthened the view that N input rate and Chaetomiaceae richness may directly mediate straw-derived POC and MOC accumulation process, respectively, during incubation. To verify our conjecture, another 60-day incubation experiment was carried out to elucidate the effects of Chaetomium globosum inoculation and N application on SOC turnover after straw addition. Chaetomium globosum inoculation with regular N input pro-moted straw decomposition and SOC sequestration than other treatments, but no difference was observed in soil respiratory quotient compared with control. The slopes of linear regression model show the more significant and positive correlations between SOC content and Chaetomiaceae richness in the present study than data from previous references, impling the important role of Chaetomiaceae in SOC sequestration in Mollisols. Our work provides new ecophysiological angles for understanding the effect of Chaetomiaceae richness on the accrual of SOC in response to varying N levels in agroecosystems on the Northeast China Plain.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; China Agriculture Research System ; Key Research and Development Pro-gram of Jiangsu Province ; [XDA28020203] ; [XDA24020104] ; [42177332] ; [42177292] ; [41877020] ; [CARS-03-15] ; [CARS-52] ; [BE2019378]
WOS关键词	MICROBIAL COMMUNITY STRUCTURE ; LITTER DECOMPOSITION ; SOIL AGGREGATION ; LAND-USE ; MATTER ; STABILIZATION ; DIVERSITY ; BACTERIAL ; BIOCHAR ; TILLAGE
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000880077800002
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; China Agriculture Research System ; Key Research and Development Pro-gram of Jiangsu Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130158]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Jiabao
作者单位	1.Heilongjiang Acad Agr Sci, Inst Soil Fertilizer & Environm Resources, Harbin 150086, Peoples R China 2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China 3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Fengqiu Expt Stn Natl Ecosyst Res Network China, Nanjing 210008, Peoples R China 4.Chinese Acad Sci, Hefei Inst Phys Sci, Ctr Ion Beam Bioengn Green Agr, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Duan, Yan,Chen, Lin,Li, Yumei,et al. Nitrogen input level modulates straw-derived organic carbon physical fractions accumulation by stimulating specific fungal groups during decomposition[J]. SOIL & TILLAGE RESEARCH,2023,225.
APA	Duan, Yan.,Chen, Lin.,Li, Yumei.,Li, Jiangye.,Zhang, Congzhi.,...&Zhang, Jiabao.(2023).Nitrogen input level modulates straw-derived organic carbon physical fractions accumulation by stimulating specific fungal groups during decomposition.SOIL & TILLAGE RESEARCH,225.
MLA	Duan, Yan,et al."Nitrogen input level modulates straw-derived organic carbon physical fractions accumulation by stimulating specific fungal groups during decomposition".SOIL & TILLAGE RESEARCH 225(2023).