Supraoptimal nitrogen sidedressing on morpho-agronomic traits of maize

Authors

  • Mariana Mendes Fagherazzi UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC
  • Clovis Arruda Souza Universidade do Estado de Santa Catarina
  • Ricardo Trezzi Casa UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC
  • Cileide Maria Medeiros Coelho UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC

DOI:

https://doi.org/10.5965/223811711512016074

Keywords:

Zea mays, adubação, acamamento, produtividade agrícola.

Abstract

Nitrogen is the element that has the most influence on grain yield in maize plantations; however, the excess of this nutrient increases the likelihood of lodging. The occurrence of lodging can be prevented by applying a plant growth regulator. In this respect, an experiment was carried out to evaluate the effects of nitrogen sidedressing above the ideal level, associated with the use of trinexapac-ethyl in maize cv. P30R50H. The experiment was conducted under field conditions during the season 2013/2014, in Lages - SC. The experimental design was a randomized block design with four replications, and the treatments consisted of four nitrogen rates and a rate of trinexapac-ethyl applied at all nitrogen rates. Nitrogen rates were equivalent to 1.0, 1.35, 1.70 and 2.0 times the required rate to reach the yield of 12 t ha-1. The N sidedressing rates were equally divided and applied on plants at phenological stages V4, V7 and V9. The trinexapac-ethyl was applied when the plants reached V10 (ten fully developed leaves) at a concentration of 300 g a.i. ha-1. Only the variable length of the leaf opposite the ear increased with increasing the ideal level of nitrogen sidedressing. Lodging, plant height, leaf chlorophyll, grain yield and nitrogen content in the grains were not affected by N sidedressing above the ideal level, associated with the use of trinexapac-ethyl.

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Author Biographies

Mariana Mendes Fagherazzi, UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC

UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC

Clovis Arruda Souza, Universidade do Estado de Santa Catarina

UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC

Ricardo Trezzi Casa, UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC

UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC

Cileide Maria Medeiros Coelho, UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC

UDESC, CAV, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Lages-SC

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Published

2016-04-30

How to Cite

FAGHERAZZI, Mariana Mendes; SOUZA, Clovis Arruda; CASA, Ricardo Trezzi; COELHO, Cileide Maria Medeiros. Supraoptimal nitrogen sidedressing on morpho-agronomic traits of maize. Revista de Ciências Agroveterinárias, Lages, v. 15, n. 1, p. 74–79, 2016. DOI: 10.5965/223811711512016074. Disponível em: https://revistas.udesc.br/index.php/agroveterinaria/article/view/223811711512016074. Acesso em: 2 nov. 2024.

Issue

Section

Scientific Note

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