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Effect of nitrogen and sulphur fertilisation on yields, nitrates and cysteine and methionine content in onion (Allium cepa L.)

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dc.title Effect of nitrogen and sulphur fertilisation on yields, nitrates and cysteine and methionine content in onion (Allium cepa L.) en
dc.contributor.author Lošák, Tomáš
dc.contributor.author Hlušek, Jaroslav
dc.contributor.author Kráčmar, Stanislav
dc.contributor.author Mårtensson, Anna M.
dc.relation.ispartof Acta Horticulturae
dc.identifier.issn 0567-7572 Scopus Sources, Sherpa/RoMEO, JCR
dc.identifier.isbn 978-90-6605-742-5
dc.date.issued 2010
utb.relation.volume 852
dc.citation.spage 297
dc.citation.epage 304
dc.event.title 4th International Symposium on Ecologically Sound Fertilization Strategies for Field Vegetable Production
dc.event.sdate 2008-09-22
dc.event.edate 2008-09-25
dc.type conferenceObject
dc.language.iso en
dc.publisher International Society for Horticultural Science
dc.subject Ammonium sulphate en
dc.subject Application en
dc.subject Quality en
dc.subject S-amino acids en
dc.subject Vegetable en
dc.description.abstract This study explored the interactive effects of two doses of nitrogen and two levels of soil sulphur on onion yields, nitrate content and concentration of the amino acids cysteine and methionine under accurately controlled conditions. Onions were cultivated in Mitscherlich pots with 6 kg of soil with a low content of S-SO42- (5 ppm, S0) or a high content (30 ppm, S1) with added doses of 0.6 (N1) and 1.2 (N2) g N pot-1 as (NH4)2SO 4 and NH4NO3. There were no significant differences (P<0.05) in onion yields between the two N doses. The higher sulphur content (S1) increased yields by 7.0-8.4% compared with S0 for both doses of nitrogen. The nitrate content in fresh onion increased with nitrogen dose (225 and 566 mg NO3- kg -1 for N1 and N2 respectively). High sulphur reduced the nitrate content of onions by 19.3-20.5% depending on nitrogen dose. The contents of cysteine and methionine increased by on average 39.1% and 25%, respectively, with increasing nitrogen dose. Soil sulphur content did not change the cysteine content but higher sulphur content in combination with higher nitrogen dose (N2) significantly increased the methionine content, by 18.7-40.7% compared with the other treatments. Joint fertilisation with nitrogen and sulphur is thus a suitable measure to increase onion yield and quality since it stabilises or increases the content of sulphur amino acids and reduces the level of undesirable nitrates. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1004096
utb.identifier.obdid 43872235
utb.identifier.scopus 2-s2.0-77951932090
utb.identifier.wok 000313515600037
utb.source d-scopus
dc.date.accessioned 2015-01-15T13:20:26Z
dc.date.available 2015-01-15T13:20:26Z
utb.contributor.internalauthor Kráčmar, Stanislav
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