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Changes in mineral-associated carbon and nitrogen by long-term fertilization and sequestration potential with various cropping across China dry croplands
Cai, Andong1,2; Xu, Hu1; Duan, Yinghua1; Zhang, Xubo3; Ashraf, Muhammad Nadeem1; Zhang, Wenju1; Xu, Minggang1
2021
Source PublicationSOIL & TILLAGE RESEARCH
ISSN0167-1987
Volume205Pages:10
Corresponding AuthorZhang, Wenju(zhangwenju01@caas.cn) ; Xu, Minggang(xuminggang@caas.cn)
AbstractMineral-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.
KeywordFertilizer application Fine soil particles MOC sequestration potential MN sequestration potential Crop rotation
DOI10.1016/j.still.2020.104725
WOS KeywordSOIL ORGANIC-CARBON ; GRASSLAND SOILS ; CLIMATE-CHANGE ; LAND USES ; DYNAMICS ; MATTER ; SATURATION ; AGGREGATE ; FRACTIONS ; TILLAGE
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41620104006] ; National Natural Science Foundation of China[41371247] ; National Key Research and Development Program of China[2016YFD0200301]
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000582696400002
PublisherELSEVIER
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/156562
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhang, Wenju; Xu, Minggang
Affiliation1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China
2.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Key Lab Agroenvironm, Minist Agr, Beijing 10081, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100081, Peoples R China
Recommended Citation
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.
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