Lodging reduction in white oat using the plant growth regulator trinexapac‑ethyl

Authors

  • Maraisa Crestani Hawerroth Embrapa Agroindústria Tropical
  • José Antonio Gonzalez da Silva Universidade Regional do Noroeste do Estado do Rio Grande do Sul
  • Clovis Arruda Souza Centro de Ciências Agroveterinárias, Universidade do Estado de Santa Catarina
  • Antonio Costa de Oliveira Universidade Federal de Pelotas, Faculdade de Agronomia ‘Eliseu Maciel’, Departamento de Fitotecnia
  • Henrique de Souza Luche Universidade Federal de Pelotas, Faculdade de Agronomia ‘Eliseu Maciel’, Departamento de Fitotecnia
  • Cristiano Mathias Zimmer Universidade Federal de Pelotas, Faculdade de Agronomia ‘Eliseu Maciel’, Departamento de Fitotecnia
  • Fernando José Hawerroth Embrapa Agroindústria Tropical
  • Jordana Schiavo Universidade Regional do Noroeste do Estado do Rio Grande do Sul
  • Julhana Cristina Sponchiado Centro de Ciências Agroveterinárias, Universidade do Estado de Santa Catarina

DOI:

https://doi.org/10.1590/S1678-3921.pab2015.v50.19362

Keywords:

Avena sativa, plant height, gibberellin biosynthesis, grain yield

Abstract

The objective of this work was to evaluate the effects of the application of doses of the plant growth regulator trinexapac‑ethyl on plant height, lodging index, and grain yield of the white oat cultivar Barbarasul at different cultivation environments and nitrogen doses. The experiments were conducted in the 2010 and 2011 crop seasons in the municipalities of Capão do Leão and Augusto Pestana, in the state of Rio Grande do Sul, and in the 2010 and 2012 crop seasons in the municipality of Lages, in the state of Santa Catarina, Brazil. A randomized complete block design was used, in a 4x2x6 factorial arrangement (dose of trinexapac‑ethyl, development stage, and environment), with four replicates consisting of 3.0 m2 plots. In each environment, nitrogen fertilization was done with 30 and 90 kg ha‑1 N. The evaluated traits were plant height, lodging index percentage, and grain yield. The application of the growth regulator trinexapac‑ethyl, at the doses of 100 to 150 g a.i. ha‑1 in 'Barbarasul' white oat plants, in the E31 and E32 development stages, reduces plant height and the percentage of lodging, without harming grain yield. The intensity of the reduction in lodging depends on the conditions of the cultivation environment.

Author Biography

Maraisa Crestani Hawerroth, Embrapa Agroindústria Tropical

 

 

Published

2015-02-24

How to Cite

Hawerroth, M. C., Silva, J. A. G. da, Souza, C. A., Oliveira, A. C. de, Luche, H. de S., Zimmer, C. M., … Sponchiado, J. C. (2015). Lodging reduction in white oat using the plant growth regulator trinexapac‑ethyl. Pesquisa Agropecuaria Brasileira, 50(2), 115–125. https://doi.org/10.1590/S1678-3921.pab2015.v50.19362

Issue

Section

CROP SCIENCE