Publication
Efficiency of organic nitrogen fertilization of potato in Northeast Portugal
dc.contributor.author | Rodrigues, M.A. | |
dc.contributor.author | Coutinho, João | |
dc.contributor.author | Martins, Fernando | |
dc.date.accessioned | 2010-03-08T11:38:51Z | |
dc.date.available | 2010-03-08T11:38:51Z | |
dc.date.issued | 2001 | |
dc.description.abstract | The study was conducted over a 4 year period with the purpose of measuring N mineralization using an in situ incubation technique, following the application of farmyard manure, poultry manure or municipal solid waste. The results varied from –10 % (net immobilization) to +28 % (net mineralization) in relation to the total organic N applied. N fluxes were assessed through plant N analysis during the growing season and through determination of potato tuber dry weight (TDW), N uptake by tubers and the apparent N recovery (ANR) of added N at harvest. Organic material applications slightly increased TDW above the control treatment (9 to 25%), although the results indicate a shortage of N, where no N was added to the crop. The effect of organic fertilization on N uptake by tubers was also limited. Petiole nitrate concentration and estimated net N mineralization were in agreement with trends in TDW and N uptake by tubers, with no differences in soil N availability between the control and organic treatments. Values of ANR were particularly low, ranging from 4 to 23 %. The results suggest that caution is needed when judging the contribution of organic fertilization to N nutrition of crops, which have a short growing season. Synchronization between N release and plant uptake is discussed. | pt |
dc.identifier.citation | International Conference on Environmental Problems Associated with Nitrogen Fertilisation of Field Grown Vegetable Crops. Potsdam, 2001. p. 179-186. ISBN 978-90-66059-74-0 | pt |
dc.identifier.doi | 10.17660/ActaHortic.2001.563.22 | |
dc.identifier.isbn | 978-90-66059-74-0 | |
dc.identifier.issn | 0567-7572 | |
dc.identifier.uri | http://hdl.handle.net/10198/2205 | |
dc.language.iso | eng | pt |
dc.publisher | International Society for Horticultural Science | pt |
dc.relation.ispartofseries | Acta Horticulturae;563 | |
dc.subject | Farmyard manure | pt |
dc.subject | Municipal solid waste | pt |
dc.subject | Poultry manure | pt |
dc.subject | Nitrogen mineralization | pt |
dc.subject | Nitrogen uptake | pt |
dc.subject | Solanum tuberosum L. | pt |
dc.title | Efficiency of organic nitrogen fertilization of potato in Northeast Portugal | pt |
dc.type | conference paper | |
dspace.entity.type | Publication | |
oaire.citation.endPage | 186 | pt |
oaire.citation.startPage | 179 | pt |
oaire.citation.title | Acta Horticulturae | pt |
person.familyName | Rodrigues | |
person.givenName | Manuel | |
person.identifier.ciencia-id | 371D-DF0D-8D68 | |
person.identifier.orcid | 0000-0002-5367-1129 | |
person.identifier.rid | O-1721-2016 | |
person.identifier.scopus-author-id | 35270106800 | |
rcaap.rights | openAccess | pt |
rcaap.type | conferenceObject | pt |
relation.isAuthorOfPublication | 43621353-fa11-4559-9b24-27eba5ad3de0 | |
relation.isAuthorOfPublication.latestForDiscovery | 43621353-fa11-4559-9b24-27eba5ad3de0 |
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