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Mechanisms of soil N dynamics following long-term application of organic fertilizers to subtropical rain-fed purple soil in China
Wang, Jing1; Zhu, Bo2; Zhang, Jinbo1,3,4,5; Mueller, Christoph6,7; Cai, Zucong1,3,4,5
Corresponding AuthorZhang, Jinbo
2015-12-01
Source PublicationSOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
Volume91Pages:222-231
SubtypeArticle
AbstractIn this study, a N-15 tracing incubation experiment and an in situ monitoring study were combined to investigate the effects of different N fertilizer regimes on the mechanisms of soil N dynamics from a long-term repeated N application experiment. The field study was initiated in 2003 under a wheat-maize rotation system in the subtropical rain-fed purple soil region of China. The experiment included six fertilization treatments applied on an equivalent N basis (280 kg N ha(-1)), except for the residue only treatment which received 112 kg N ha(-1): (1) UC, unfertilized control; (2) NPK, mineral fertilizer NPK; (3) OM, pig manure; (4) OM-NPK, pig manure (40% of applied N) with mineral NPK (60% of applied N); (5) RSD, crop straw; (6) RSD-NPK, crop straw (40% of applied N) with mineral NPK (60% of applied N). The results showed that long-term repeated applications of mineral or organic N fertilizer significantly stimulated soil gross N mineralization rates, which was associated with enhanced soil C and N contents following the application of N fertilizer. The crop N Make and yield were positively correlated with gross mineralization. Gross autotrophic nitrification rates were enhanced by approximately 2.5-fold in the NPK, OM, OM-NPK, and RSD-NPK treatments, and to a lesser extent by RSD application, compared to the UC. A significant positive relationship between gross nitrification rates and cumulative N loss via interflow and runoff indicated that the mechanisms responsible for increasing N loss following long-term applications of N fertilizer were governed by the nitrification dynamics. Organic fertilizers stimulated gross ammonium (NH4+) immobilization rates and caused a strong competition with nitrifiers for NH4+, thus preventing a build-up of nitrate (NO3-). Overall, in this study, we found that partial or complete substitution of NPK fertilizers with organic fertilizers can reduce N losses and maintain high crop production, except for the treatment involving application of RSD alone. Therefore, based on the N transformation dynamics observed in this study, organic fertilizers in combination with mineral fertilizer applications (i.e. OM, OM-NPK, and RSD-NPK treatments) are recommended for crop production in the subtropical rain-fed purple soils in China. (C) 2015 Elsevier Ltd. All rights reserved.
KeywordLong-term Field Fertilization Gross n Mineralization Nitrification N-15 Tracing Technique n Loss
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.soilbio.2015.08.039
WOS Subject ExtendedAgriculture
Indexed BySCI
WOS KeywordDISSIMILATORY NITRATE REDUCTION ; CHILEAN NOTHOFAGUS FOREST ; NITROGEN TRANSFORMATIONS ; HILLSLOPE CROPLAND ; CROPPING SYSTEMS ; GRASSLAND SOIL ; N2O EMISSIONS ; DAIRY WASTE ; AMMONIUM ; SLURRY
Language英语
WOS SubjectSoil Science
WOS IDWOS:000364502900025
Funding OrganizationNational Natural Science Foundation of China(41330744) ; "973" project(2014CB953803) ; Natural Science Foundation of Jiangsu Province(BK20140062) ; Qing Lan Project(184080H102142) ; Outstanding Innovation Team in Colleges and Universities in Jiangsu Province ; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)(164320H116)
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Cited Times:93[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/13839
Collection山地表生过程与生态调控重点实验室
Affiliation1.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210023, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
3.Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing, Jiangsu, Peoples R China
4.Nanjing Normal Univ, Minist Educ, Key Lab Vitual Geog Environm VGE, Nanjing 210023, Jiangsu, Peoples R China
5.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing, Jiangsu, Peoples R China
6.Univ Giessen, Dept Plant Ecol IFZ, D-35392 Giessen, Germany
7.Univ Coll Dublin, Sch Biol & Environm Sci, Dublin, Ireland
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GB/T 7714
Wang, Jing,Zhu, Bo,Zhang, Jinbo,et al. Mechanisms of soil N dynamics following long-term application of organic fertilizers to subtropical rain-fed purple soil in China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2015,91:222-231.
APA Wang, Jing,Zhu, Bo,Zhang, Jinbo,Mueller, Christoph,&Cai, Zucong.(2015).Mechanisms of soil N dynamics following long-term application of organic fertilizers to subtropical rain-fed purple soil in China.SOIL BIOLOGY & BIOCHEMISTRY,91,222-231.
MLA Wang, Jing,et al."Mechanisms of soil N dynamics following long-term application of organic fertilizers to subtropical rain-fed purple soil in China".SOIL BIOLOGY & BIOCHEMISTRY 91(2015):222-231.
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