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dc.contributor.authorZhao, BQ
dc.contributor.authorLi, XY
dc.contributor.authorLiu, H
dc.contributor.authorWang, BR
dc.contributor.authorZhu, P
dc.contributor.authorHuang, SM
dc.contributor.authorBao, DJ
dc.contributor.authorLi, YT
dc.contributor.authorSo, HB
dc.date.accessioned2017-05-03T13:51:06Z
dc.date.available2017-05-03T13:51:06Z
dc.date.issued2011
dc.date.modified2012-08-15T23:37:33Z
dc.identifier.issn1573-5214
dc.identifier.doi10.1016/j.njas.2011.09.004
dc.identifier.urihttp://hdl.handle.net/10072/43773
dc.description.abstractNitrate-N distribution and accumulation down to 200 or 300 cm in the soil profile of different longterm fertilization regimes were studied in 2002 in the China Long-Term Experiments Network (CLTEN) including eight experimental sites where the experiments were started in 1990 or 1991. In this paper we report on the results from five comparable sites (Beijing, Henan, Hunan, Jilin and Xinjiang) representing a wide range of soils, climates and cropping systems some of them with irrigation. At each site, crops (wheat and/or maize) had been grown with no inorganic fertilizer or manure inputs (as control), and with various combinations of N, P or K fertilizers or with NPK plus different levels of manure (M) or straw (S). Fields where N input was from inorganic fertilizers, generally had higher amounts of accumulated NO3-N in the soil profile than control or long-term fallowed soils, which indicated that the use of inorganic fertilizer-N in agricultural systems increased the risk of pollution of the environment. Long-term application of fertilizer-N without P (N, NK) resulted in low crop yields and low N uptake by the crops, leading to lower cumulative apparent N recovery (ANR) and higher NO3-N content and accumulation in the soil profile. This increased the risk of groundwater contamination by nitrate. When fertilizer-N was applied along with P (NP) or PK (NPK) the crop yields, N uptake by the crops and ANR increased markedly and the NO3-N accumulation in the soil profile was much lower than in the N and NK treatments. Adding manure or straw based on equal total N (NPK + M or NPK + S) resulted in similar contents and accumulation of NO3-N in the soil profile as in NPK treatment under normal conditions. Increasing the N input levels whether through inorganic fertilizer or manure (NPK + 1.5M or 1.5(NPK + M)) further increased the NO3-N accumulation in the soil profile. The data show that potentially 24-82% of applied inorganic fertilizer-N was lost, mostly through ammonia volatilization. It was estimated that a quarter of the N was lost through leaching beyond the root zone.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent600120 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeNetherlands
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom177
dc.relation.ispartofpageto183
dc.relation.ispartofissue3-4
dc.relation.ispartofjournalNJAS Wageningen Journal of Life Sciences
dc.relation.ispartofvolume58
dc.rights.retentionY
dc.subject.fieldofresearchAgricultural, veterinary and food sciences
dc.subject.fieldofresearchOther agricultural, veterinary and food sciences not elsewhere classified
dc.subject.fieldofresearchcode30
dc.subject.fieldofresearchcode309999
dc.titleResults from long-term fertilizer experiments in China: The risk of groundwater pollution by nitrate
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2011 Elsevier. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.date.issued2011
gro.hasfulltextFull Text
gro.griffith.authorSo, Bing


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