Data/hora: 16/06/2024 04:37:41

Provedor de dados: | 63
País: | Brazil
Título: | Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil
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.
Data: | 2019-07-01
Ano: | 2019
Palavras-chave: | Zea mays; Hybrid; Population; Corn yield; Second-crop.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400344
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/1678-992x-2017-0295
Formato: | text/html
Fonte: | Scientia Agricola  v.76 n.4 2019
Fonte: | info:eu-repo/semantics/openAccess