Changes in mineral-associated carbon and nitrogen by long-term fertilization and sequestration potential with various cropping across China dry croplands

doi:10.1016/j.still.2020.104725

	Changes in mineral-associated carbon and nitrogen by long-term fertilization and sequestration potential with various cropping across China dry croplands
	Cai, Andong 1,2; Xu, Hu 2; Duan, Yinghua 2; Zhang, Xubo 3; Ashraf, Muhammad Nadeem 2; Zhang, Wenju 2; Xu, Minggang 2
刊名	SOIL & TILLAGE RESEARCH
	2021
卷号	205 页码:10
关键词	Fertilizer application Fine soil particles MOC sequestration potential MN sequestration potential Crop rotation
ISSN号	0167-1987
DOI	10.1016/j.still.2020.104725
通讯作者	Zhang, Wenju(zhangwenju01@caas.cn) ; Xu, Minggang(xuminggang@caas.cn)
英文摘要	Mineral-associated organic carbon (MOC) and mineral-associated nitrogen (MN) are the major pools of total soil organic carbon (TSOC) and total nitrogen (TN) stocks. Thus, it is important to understand the impact of agricultural practices on MOC and MN stocks and capacities. The present study aimed to explore how the application of various fertilizers and crop rotation affect MOC and MN, and how improved management practices sequester carbon and nitrogen as MOC and MN to mitigate climate change. Twenty-one long-term experiments across China dry croplands with various soil types and crop rotations were involved to investigate the effects of the application of various fertilizers on MOC and MN. Results showed that mineral fertilizers combined with manure significantly increased TSOC (62 %) and TN (57 %), and MOC (33 %) and MN (32 %) concentrations, respectively, resulting in decreased ratios of MOC/TSOC (0.59) and MN/TN (0.47). Moreover, mineral fertilizers with straw significantly increased MOC/TSOC ratio, but had no effects on MN/TN ratio compared with mineral fertilizer application (0.72 - 0.77). Significantly positive linear correlations were observed between MOC (MN) concentrations and the mass proportion of fine soil particles ( < 20 mu m). Further analysis suggested that TN, TSOC, crop rotation (e.g., wheat-maize, wheat-soybean, maize-soybean, maize-rape, and maize monoculture), and fine soil particle content were the key regulating factors, which accounted for about72 % of the variations of MOC and MN concentration. Boundary line analysis suggested that MOC and MN had the potential to increase by 48 % and 39 %, respectively. In conclusion, main dry croplands in China might sequester an additional 527 Tg for MOC and 37 Tg for MN with appropriate crop rotation and manure application.
资助项目	National Natural Science Foundation of China[41620104006] ; National Natural Science Foundation of China[41371247] ; National Key Research and Development Program of China[2016YFD0200301]
WOS关键词	SOIL ORGANIC-CARBON ; GRASSLAND SOILS ; CLIMATE-CHANGE ; LAND USES ; DYNAMICS ; MATTER ; SATURATION ; AGGREGATE ; FRACTIONS ; TILLAGE
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000582696400002
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156561]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Wenju; Xu, Minggang
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Key Lab Agroenvironm, Minist Agr, Beijing 10081, Peoples R China 2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Cai, Andong,Xu, Hu,Duan, Yinghua,et al. Changes in mineral-associated carbon and nitrogen by long-term fertilization and sequestration potential with various cropping across China dry croplands[J]. SOIL & TILLAGE RESEARCH,2021,205:10.
APA	Cai, Andong.,Xu, Hu.,Duan, Yinghua.,Zhang, Xubo.,Ashraf, Muhammad Nadeem.,...&Xu, Minggang.(2021).Changes in mineral-associated carbon and nitrogen by long-term fertilization and sequestration potential with various cropping across China dry croplands.SOIL & TILLAGE RESEARCH,205,10.
MLA	Cai, Andong,et al."Changes in mineral-associated carbon and nitrogen by long-term fertilization and sequestration potential with various cropping across China dry croplands".SOIL & TILLAGE RESEARCH 205(2021):10.