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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil.
Autores:  FARIA, I. K. P. de
VIEIRA, J. L. V.
TENELLI, S.
ALMEIDA, R. E. M. de
CAMPOS, L. J. M.
COSTA, R. V. da
ZAVASCHI, E.
ALMEIDA, R. F. de
CARNEIRO, L. de M. e S.
OTTO, R.
Data:  2019-05-30
Ano:  2019
Palavras-chave:  Milho
Zea Mays
População de Planta
Densidade de Plantio
Milho Hibrido
Corn
Hybrids
Population density
Resumo:  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.
Tipo:  Separatas
Idioma:  Inglês
Identificador:  Scientia Agricola, v. 76, n. 4, p. 344-352, jul./ago. 2019.

http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109502

10.1590/1678-992X-2017-0295
Direitos:  openAccess
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