| Registro completo |
| Provedor de dados: |
Scientia Agricola
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| País: |
Brazil
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| Título: |
Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil
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| Autores: |
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
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| Data: |
2019-07-01
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| Ano: |
2019
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| Palavras-chave: |
Zea mays
Hybrid
Population
Corn yield
Second-crop
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| Resumo: |
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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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400344
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| Editor: |
São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
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| Relação: |
10.1590/1678-992x-2017-0295
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| Formato: |
text/html
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| Fonte: |
Scientia Agricola v.76 n.4 2019
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| Direitos: |
info:eu-repo/semantics/openAccess
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