Publicação
Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices
| Resumo: | The quantification of sidedress N rate from in-season information on crop N nutritional status is extremely important in order to use only the necessary amount of nutrient to achieve maximum yields without significant N losses from soil. During three consecutive years (1996, 1997 and 1998) field N fertilizer experiments with irrigated potato (Solanum tuberosum L., cv. Désirée) were conducted in Bragança (NE Portugal). Eight preplant treatments (0, 50, 100, 200 and 300 kg urea-N/ha and poultry manure, farmyard manure and municipal solid waste in rates equivalent to 100 kg organic-N/ha) were arranged as main plots and five sidedress N rates (0, 25, 50, 100 and 200 kg urea-N/ha) included as subplots. Petiole nitrate concentration, determined by a laboratory method (PNLab, g NO3-N kg−1, dry weight basis) and by the portable RQflex reflectometer (PNRQflex, mg NO3 kg−1, from fresh tissues), and leaf N content (LeafN, g kg−1, dry weight basis) were used as N nutritional indices. From the five sidedress N rates applied over each of the preplant treatments, critical sidedress N rates were estimated for several different crop N nutritional status. This was achieved by establishing exponential asymptotic curves between sidedress N rates and tuber yields and solving the equations for 95% of maximum tuber yield. In a second step, multiple regression equations were established between the estimated critical sidedress N rates (SNrate, kg N/ha), as dependent variable, and each crop N nutritional indices (PNLab, PNRQflex or LeafN) and days after emergence (DAE). The equations obtained are: SNrate = 182.7 − 4.146 × PNLab −1.87 × DAE SNrate = 161.0 − 0.013 × PNRQflex −1.34 × DAE SNrate = 562.2 − 8.416 × LeafN −3.59 × DAE These equations provide quantitative sidedress N rates for any level of crop N nutritional indices and sampling dates from 10 to 48 days after emergence. |
|---|---|
| Autores principais: | Rodrigues, M.A. |
| Outros Autores: | Coutinho, João; Martins, Fernando; Arrobas, Margarida |
| Assunto: | Solanum tuberosum Crop N management Decision support system Plant analysis Tissue testing |
| Ano: | 2005 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| _version_ | 1867172731614658560 |
|---|---|
| author | Rodrigues, M.A. |
| author2 | Coutinho, João Martins, Fernando Arrobas, Margarida |
| author2_role | author author author |
| author_facet | Rodrigues, M.A. Coutinho, João Martins, Fernando Arrobas, Margarida |
| author_role | author |
| contributor_name_str_mv | Biblioteca Digital do IPB |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Rodrigues, M.A.\",\"Person.identifier.orcid\":\"0000-0002-5367-1129\"},{\"Person.name\":\"Coutinho, João\"},{\"Person.name\":\"Martins, Fernando\"},{\"Person.name\":\"Arrobas, Margarida\",\"Person.identifier.orcid\":\"0000-0002-4652-485X\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Biblioteca Digital do IPB |
| datacite.creators.creator.creatorName.fl_str_mv | Rodrigues, M.A. Coutinho, João Martins, Fernando Arrobas, Margarida |
| datacite.date.Accepted.fl_str_mv | 2005-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2010-03-05T16:19:28Z |
| datacite.date.embargoed.fl_str_mv | 2010-03-05T16:19:28Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Solanum tuberosum Crop N management Decision support system Plant analysis Tissue testing |
| datacite.titles.title.fl_str_mv | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices |
| dc.contributor.none.fl_str_mv | Biblioteca Digital do IPB |
| dc.creator.none.fl_str_mv | Rodrigues, M.A. Coutinho, João Martins, Fernando Arrobas, Margarida |
| dc.date.Accepted.fl_str_mv | 2005-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2010-03-05T16:19:28Z |
| dc.date.embargoed.fl_str_mv | 2010-03-05T16:19:28Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10198/2201 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Solanum tuberosum Crop N management Decision support system Plant analysis Tissue testing |
| dc.title.fl_str_mv | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | The quantification of sidedress N rate from in-season information on crop N nutritional status is extremely important in order to use only the necessary amount of nutrient to achieve maximum yields without significant N losses from soil. During three consecutive years (1996, 1997 and 1998) field N fertilizer experiments with irrigated potato (Solanum tuberosum L., cv. Désirée) were conducted in Bragança (NE Portugal). Eight preplant treatments (0, 50, 100, 200 and 300 kg urea-N/ha and poultry manure, farmyard manure and municipal solid waste in rates equivalent to 100 kg organic-N/ha) were arranged as main plots and five sidedress N rates (0, 25, 50, 100 and 200 kg urea-N/ha) included as subplots. Petiole nitrate concentration, determined by a laboratory method (PNLab, g NO3-N kg−1, dry weight basis) and by the portable RQflex reflectometer (PNRQflex, mg NO3 kg−1, from fresh tissues), and leaf N content (LeafN, g kg−1, dry weight basis) were used as N nutritional indices. From the five sidedress N rates applied over each of the preplant treatments, critical sidedress N rates were estimated for several different crop N nutritional status. This was achieved by establishing exponential asymptotic curves between sidedress N rates and tuber yields and solving the equations for 95% of maximum tuber yield. In a second step, multiple regression equations were established between the estimated critical sidedress N rates (SNrate, kg N/ha), as dependent variable, and each crop N nutritional indices (PNLab, PNRQflex or LeafN) and days after emergence (DAE). The equations obtained are: SNrate = 182.7 − 4.146 × PNLab −1.87 × DAE SNrate = 161.0 − 0.013 × PNRQflex −1.34 × DAE SNrate = 562.2 − 8.416 × LeafN −3.59 × DAE These equations provide quantitative sidedress N rates for any level of crop N nutritional indices and sampling dates from 10 to 48 days after emergence. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://bibliotecadigital.ipb.pt/bitstreams/694fe162-0311-4da1-affb-a79d604594be/download |
| id | ipb_0fca9e2bc4d37bb123060f17fbf0b77f |
| identifier.url.fl_str_mv | http://hdl.handle.net/10198/2201 |
| instacron_str | ipb |
| institution | Instituto Politécnico de Bragança |
| instname_str | Instituto Politécnico de Bragança |
| language | eng |
| network_acronym_str | ipb |
| network_name_str | Biblioteca Digital do IPB |
| oai_identifier_str | oai:bibliotecadigital.ipb.pt:10198/2201 |
| organization_str_mv | urn:organizationAcronym:ipb |
| person_str_mv | Rodrigues, M.A. Rodrigues, M.A. https://www.ciencia-id.pt/371D-DF0D-8D68 371D-DF0D-8D68 http://orcid.org/0000-0002-5367-1129 0000-0002-5367-1129 Coutinho, João Martins, Fernando Arrobas, Margarida Arrobas, Margarida https://www.ciencia-id.pt/971C-B85B-1EC0 971C-B85B-1EC0 http://orcid.org/0000-0002-4652-485X 0000-0002-4652-485X |
| publishDate | 2005 |
| publisher.none.fl_str_mv | Elsevier |
| reponame_str | Biblioteca Digital do IPB |
| repository_id_str | urn:repositoryAcronym:ipb |
| service_str_mv | urn:repositoryAcronym:ipb |
| spelling | engElsevierptThe quantification of sidedress N rate from in-season information on crop N nutritional status is extremely important in order to use only the necessary amount of nutrient to achieve maximum yields without significant N losses from soil. During three consecutive years (1996, 1997 and 1998) field N fertilizer experiments with irrigated potato (Solanum tuberosum L., cv. Désirée) were conducted in Bragança (NE Portugal). Eight preplant treatments (0, 50, 100, 200 and 300 kg urea-N/ha and poultry manure, farmyard manure and municipal solid waste in rates equivalent to 100 kg organic-N/ha) were arranged as main plots and five sidedress N rates (0, 25, 50, 100 and 200 kg urea-N/ha) included as subplots. Petiole nitrate concentration, determined by a laboratory method (PNLab, g NO3-N kg−1, dry weight basis) and by the portable RQflex reflectometer (PNRQflex, mg NO3 kg−1, from fresh tissues), and leaf N content (LeafN, g kg−1, dry weight basis) were used as N nutritional indices. From the five sidedress N rates applied over each of the preplant treatments, critical sidedress N rates were estimated for several different crop N nutritional status. This was achieved by establishing exponential asymptotic curves between sidedress N rates and tuber yields and solving the equations for 95% of maximum tuber yield. In a second step, multiple regression equations were established between the estimated critical sidedress N rates (SNrate, kg N/ha), as dependent variable, and each crop N nutritional indices (PNLab, PNRQflex or LeafN) and days after emergence (DAE). The equations obtained are: SNrate = 182.7 − 4.146 × PNLab −1.87 × DAE SNrate = 161.0 − 0.013 × PNRQflex −1.34 × DAE SNrate = 562.2 − 8.416 × LeafN −3.59 × DAE These equations provide quantitative sidedress N rates for any level of crop N nutritional indices and sampling dates from 10 to 48 days after emergence.application/pdfptQuantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indicesPersonalRodrigues, M.A.DSpacehttp://dspace.org/items/43621353-fa11-4559-9b24-27eba5ad3de0DSpacehttp://dspace.org/items/43621353-fa11-4559-9b24-27eba5ad3de0RodriguesManuel ÂngeloCiência IDhttps://www.ciencia-id.pt371D-DF0D-8D68ORCIDhttp://orcid.org0000-0002-5367-1129Researcher IDhttps://www.researcherid.comO-1721-2016Scopus Author IDhttps://www.scopus.com35270106800Coutinho, JoãoMartins, FernandoPersonalArrobas, MargaridaDSpacehttp://dspace.org/items/d057ae6b-331c-4980-967d-0ce4fe1bcf8aDSpacehttp://dspace.org/items/d057ae6b-331c-4980-967d-0ce4fe1bcf8aArrobasMargaridaCiência IDhttps://www.ciencia-id.pt971C-B85B-1EC0ORCIDhttp://orcid.org0000-0002-4652-485XScopus Author IDhttps://www.scopus.com8575728800HostingInstitutionOrganizationalBiblioteca Digital do IPBe-mailmailto:dspace@ipb.ptdspace@ipb.ptISSNIsPartOf1161-0301DOIIsPartOf10.1016/j.eja.2004.10.0012010-03-05T16:19:28Z20052005-01-01T00:00:00ZHandlehttp://hdl.handle.net/10198/2201http://purl.org/coar/access_right/c_abf2open accessSolanum tuberosumCrop N managementDecision support systemPlant analysisTissue testing401243 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://bibliotecadigital.ipb.pt/bitstreams/694fe162-0311-4da1-affb-a79d604594be/downloadEuropean Journal of Agronomy23(1)7988 |
| spellingShingle | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices Rodrigues, M.A. Solanum tuberosum Crop N management Decision support system Plant analysis Tissue testing |
| status | SINGLETON |
| subject.fl_str_mv | Solanum tuberosum Crop N management Decision support system Plant analysis Tissue testing |
| title | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices |
| title_full | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices |
| title_fullStr | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices |
| title_full_unstemmed | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices |
| title_short | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices |
| title_sort | Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices |
| topic | Solanum tuberosum Crop N management Decision support system Plant analysis Tissue testing |
| topic_facet | Solanum tuberosum Crop N management Decision support system Plant analysis Tissue testing |
| url | http://hdl.handle.net/10198/2201 |
| visible | 1 |