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Soil nitrogen fractions under long-term crop rotations in the Loess Plateau of China
Fu, Xin1; Wang, Jun1; Sainju, Upendra M.2; Liu, Wenzhao3
2019-03-01
Source PublicationSOIL & TILLAGE RESEARCH
ISSN0167-1987
Volume186Pages:42-51
Corresponding AuthorWang, Jun(wangj@nwu.edu.cn)
AbstractLong-term crop rotation may influence soil N storage, mineralization, and availability. We studied the 30 yr effect of crop rotations on soil N fractions at 0-15 and 15-30 cm depths in the Loess Plateau of China. Crop rotations were continuous winter wheat (Triticurn aestivwn L.) (W), corn (Zea mays L.)-winter wheat-winter wheat-millet (Eleusine coracana L.) (CWWM), pea (Piswn sativwn L.)-winter wheat-winter wheat-millet (PWWM), and sainfoin (Onobrychis viciifolia Scop.)-winter wheat-winter wheat-sainfoin (SWWS); pea-winter wheat-winter wheat-corn (PWWC); alfalfa (Medicago sativa L.) (4 yr)-potato (solanwn tuberoswn L.) (1 yr)-winter wheat (3 yr) (A4PoW3), and fallow (F). Nitrogen fractions were soil total N (STN), particulate organic N (PON), microbial biomass N (MBN), potential N mineralization (PNM), NH4-N, and NO3-N. The STN and PON at 0-15 cm were greater in CWWM and at 15-30 cm were greater in A4PoW3 than F and W. The PNM at both depths was greater in A4PoW3 than other crop rotations, except SWWS and CWWM. The MBN was greater in CWWM, PWWM, SWWS, and A4PoW3 than other crop rotations. The NH4-N content was greater in F than other crop rotations, except PWWC. The NO3-N content at 0-15 cm was greater in CWWM and at 15-30 cm was greater in PWWM than F. Most soil N fractions were correlated with each other and also with the length of the crop rotation. Diversified crop rotations with increased root biomass N returned to the soil and longer year rotations enhanced soil N storage, mineralization, and availability compared with monocropping and fallow.
KeywordLabile soil nitrogen Nonlabile soil nitrogen Nitrogen cycling
DOI10.1016/j.still.2018.10.004
WOS KeywordMICROBIAL BIOMASS ; DRYLAND SOIL ; CARBON FRACTIONS ; ORGANIC-CARBON ; ROOT BIOMASS ; TILLAGE ; WHEAT ; MINERALIZATION ; LEGUMES ; BALANCE
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[31570440] ; National Natural Science Foundation of China[31270484] ; International Scientific and Technological Cooperation and Exchange Project of Shaanxi Province, China[2015KW-026] ; Innovation Funds of Graduate Programs, Northwest University[YZZ13006] ; Outstanding Doctoral Dissertation Cultivation Project of Northwest University[YYB17017]
Funding OrganizationNational Natural Science Foundation of China ; International Scientific and Technological Cooperation and Exchange Project of Shaanxi Province, China ; Innovation Funds of Graduate Programs, Northwest University ; Outstanding Doctoral Dissertation Cultivation Project of Northwest University
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000452934500005
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/51485
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Jun
Affiliation1.Northwest Univ, Coll Urban & Environm Sci, Shaanxi Key Lab Earth Surface Syst & Environm Car, Xian 710127, Shaanxi, Peoples R China
2.USDA ARS, Northern Plains Agr Res Lab, 1500 North Cent Ave, Sidney, MT 59270 USA
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Fu, Xin,Wang, Jun,Sainju, Upendra M.,et al. Soil nitrogen fractions under long-term crop rotations in the Loess Plateau of China[J]. SOIL & TILLAGE RESEARCH,2019,186:42-51.
APA Fu, Xin,Wang, Jun,Sainju, Upendra M.,&Liu, Wenzhao.(2019).Soil nitrogen fractions under long-term crop rotations in the Loess Plateau of China.SOIL & TILLAGE RESEARCH,186,42-51.
MLA Fu, Xin,et al."Soil nitrogen fractions under long-term crop rotations in the Loess Plateau of China".SOIL & TILLAGE RESEARCH 186(2019):42-51.
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