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Crops use-efficiency of nitrogen from manures permitted in organic farming

2006Journal article Open access
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dc.contributor.authorRodrigues, M.A.
dc.contributor.authorPereira, Abel
dc.contributor.authorCabanas, J.E.
dc.contributor.authorDias, L.G.
dc.contributor.authorPires, Jaime
dc.contributor.authorArrobas, Margarida
dc.date.accessioned2010-03-05T15:05:26Z
dc.date.available2010-03-05T15:05:26Z
dc.date.issued2006
dc.description.abstractThe current increase in the organic agriculture segment has created a new market for fertilisers permitted for use in organic farming. Off-farm N sources for organic farming are scarce, considering the restriction on the use of chemical fertilisers. Thus, when some products are permitted in organic agriculture, commercial opportunities become available. In this study we compare the performances of Vegethumus (Veg) and Phenix (Phe), two manures that are permitted in organic farming, with several other manures, ammonium nitrate (AN) and control treatments. A 3-year field trial and a pot experiment were carried out in order to estimate dry matter yield, N uptake, and N nutritional status of the crops, as well as soil N availability, the latter was assessed by using anion exchange membranes inserted into the soil. Apparent N recovery (ANR) values in the field trial were 6.3% and 58.2% in Veg and AN plots, respectively, after the application of 380 kg N/ha in the previous five growing seasons. In the pot experiment, the ANR of Veg and Phe, the organic amendments permitted in organic farming, were 5.0% and 13.6%, while Beiraadubo (Bei) and Nutrisoil (Nut) had ANR of 27.2% and 42.0%. The poor results of the amendments permitted in organic farming, in light of their high prices suggest that their use must be carefully considered by farmer in their fertilization strategies.pt
dc.identifier.citationRodrigues, M.A.; Pereira, Abel; Cabanas, J.E.; Dias, L.G.; Pires, Jaime; Arrobas, Margarida (2006). Crops use-efficiency of nitrogen from manures permitted in organic farming. European Journal of Agronomy. ISSN 1161-0301. 25:4, p. 328-335pt
dc.identifier.doi10.1016/j.eja.2006.07.002
dc.identifier.issn1161-0301
dc.identifier.urihttp://hdl.handle.net/10198/2198
dc.language.isoengpt
dc.publisherElsevierpt
dc.subjectN managementpt
dc.subjectCommercial organic amendmentpt
dc.subjectAnion exchange membranept
dc.titleCrops use-efficiency of nitrogen from manures permitted in organic farmingpt
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage335pt
oaire.citation.issue25(4)pt
oaire.citation.startPage328pt
oaire.citation.titleEuropean Journal of Agronomypt
person.familyNameRodrigues
person.familyNameDias
person.familyNameArrobas
person.givenNameManuel Ângelo
person.givenNameLuís G.
person.givenNameMargarida
person.identifier.ciencia-id371D-DF0D-8D68
person.identifier.ciencia-id2F11-9092-FAAF
person.identifier.ciencia-id971C-B85B-1EC0
person.identifier.orcid0000-0002-5367-1129
person.identifier.orcid0000-0002-1210-4259
person.identifier.orcid0000-0002-4652-485X
person.identifier.ridO-1721-2016
person.identifier.scopus-author-id35270106800
person.identifier.scopus-author-id23569169900
person.identifier.scopus-author-id8575728800
rcaap.rightsopenAccesspt
rcaap.typearticlept
relation.isAuthorOfPublication43621353-fa11-4559-9b24-27eba5ad3de0
relation.isAuthorOfPublicationeac8c166-4056-4ed0-8d8d-7ecb2c4481a5
relation.isAuthorOfPublicationd057ae6b-331c-4980-967d-0ce4fe1bcf8a
relation.isAuthorOfPublication.latestForDiscoveryeac8c166-4056-4ed0-8d8d-7ecb2c4481a5

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