Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil
ABSTRACT: Integrating plant density and nitrogen (N) management is a strategy for improving corn yields, especially for off-season corn production in the tropics. This study tested the hypothesis that increasing plant densities and N rates promotes yield gains for off-season corn production in high-yielding environments. The aim of the study was to investigate the yield performances of two hybrid versions (DKB PRO and DKB PRO3) submitted to three plant densities (55,000; 65,000 and 75,000 plants ha−1) and four N rates (control, 60, 120 and 180 kg ha−1 N). Field trials were undertaken at Uberlândia-MG (site1 and 2) and Pedro Afonso-TO (site 3), Brazil from which data on corn yield parameters were collected and analyzed. Multivariate analysis separated the three trial areas into two groups, presenting high (sites 1 and 2) and low yields (site 3), which were related to weather conditions. There was no influence of a hybrid version or plant densities on crop yields at site 1 or 2. In contrast, there was a positive response to increasing plant densities and the use of DKB PRO3 at site 3. A significant response to N was observed at sites 2 and 3, following a plateau model. Our results suggest that N application rates and plant densities do have the potential to increase off-season corn yields in low yielding environments.
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Escola Superior de Agricultura "Luiz de Queiroz"
2019
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oai:scielo:S0103-901620190014003442019-03-18Optimal plant density and nitrogen rates for improving off-season corn yields in BrazilFaria,Italo Kaye Pinho deVieira,José Luís VilelaTenelli,SarahAlmeida,Rodrigo Estevam Munhoz deCampos,Leonardo José MottaCosta,Rodrigo Veras daZavaschi,EduardoAlmeida,Risely Ferraz deCarneiro,Leandro de Mello e SilvaOtto,Rafael Zea mays hybrid population corn yield second-crop ABSTRACT: Integrating plant density and nitrogen (N) management is a strategy for improving corn yields, especially for off-season corn production in the tropics. This study tested the hypothesis that increasing plant densities and N rates promotes yield gains for off-season corn production in high-yielding environments. The aim of the study was to investigate the yield performances of two hybrid versions (DKB PRO and DKB PRO3) submitted to three plant densities (55,000; 65,000 and 75,000 plants ha−1) and four N rates (control, 60, 120 and 180 kg ha−1 N). Field trials were undertaken at Uberlândia-MG (site1 and 2) and Pedro Afonso-TO (site 3), Brazil from which data on corn yield parameters were collected and analyzed. Multivariate analysis separated the three trial areas into two groups, presenting high (sites 1 and 2) and low yields (site 3), which were related to weather conditions. There was no influence of a hybrid version or plant densities on crop yields at site 1 or 2. In contrast, there was a positive response to increasing plant densities and the use of DKB PRO3 at site 3. A significant response to N was observed at sites 2 and 3, following a plateau model. Our results suggest that N application rates and plant densities do have the potential to increase off-season corn yields in low yielding environments.info:eu-repo/semantics/openAccessEscola Superior de Agricultura "Luiz de Queiroz"Scientia Agricola v.76 n.4 20192019-07-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400344en10.1590/1678-992x-2017-0295 |
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Faria,Italo Kaye Pinho de Vieira,José Luís Vilela Tenelli,Sarah Almeida,Rodrigo Estevam Munhoz de Campos,Leonardo José Motta Costa,Rodrigo Veras da Zavaschi,Eduardo Almeida,Risely Ferraz de Carneiro,Leandro de Mello e Silva Otto,Rafael |
| spellingShingle |
Faria,Italo Kaye Pinho de Vieira,José Luís Vilela Tenelli,Sarah Almeida,Rodrigo Estevam Munhoz de Campos,Leonardo José Motta Costa,Rodrigo Veras da Zavaschi,Eduardo Almeida,Risely Ferraz de Carneiro,Leandro de Mello e Silva Otto,Rafael Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil |
| author_facet |
Faria,Italo Kaye Pinho de Vieira,José Luís Vilela Tenelli,Sarah Almeida,Rodrigo Estevam Munhoz de Campos,Leonardo José Motta Costa,Rodrigo Veras da Zavaschi,Eduardo Almeida,Risely Ferraz de Carneiro,Leandro de Mello e Silva Otto,Rafael |
| author_sort |
Faria,Italo Kaye Pinho de |
| title |
Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil |
| title_short |
Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil |
| title_full |
Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil |
| title_fullStr |
Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil |
| title_full_unstemmed |
Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil |
| title_sort |
optimal plant density and nitrogen rates for improving off-season corn yields in brazil |
| description |
ABSTRACT: Integrating plant density and nitrogen (N) management is a strategy for improving corn yields, especially for off-season corn production in the tropics. This study tested the hypothesis that increasing plant densities and N rates promotes yield gains for off-season corn production in high-yielding environments. The aim of the study was to investigate the yield performances of two hybrid versions (DKB PRO and DKB PRO3) submitted to three plant densities (55,000; 65,000 and 75,000 plants ha−1) and four N rates (control, 60, 120 and 180 kg ha−1 N). Field trials were undertaken at Uberlândia-MG (site1 and 2) and Pedro Afonso-TO (site 3), Brazil from which data on corn yield parameters were collected and analyzed. Multivariate analysis separated the three trial areas into two groups, presenting high (sites 1 and 2) and low yields (site 3), which were related to weather conditions. There was no influence of a hybrid version or plant densities on crop yields at site 1 or 2. In contrast, there was a positive response to increasing plant densities and the use of DKB PRO3 at site 3. A significant response to N was observed at sites 2 and 3, following a plateau model. Our results suggest that N application rates and plant densities do have the potential to increase off-season corn yields in low yielding environments. |
| publisher |
Escola Superior de Agricultura "Luiz de Queiroz" |
| publishDate |
2019 |
| url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400344 |
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