IRRIGATED MAIZE CROP: GRAIN YIELD IN TWO SOWING SEASONS IN THE MUNICIPALITY OF TERESINA, PIAUÍ

Autores

  • MILTON JOSÉ CARDOSO Embrapa Meio-Norte, Teresina, PI
  • HÉLIO WILSON LEMOS CARVALHO Embrapa Tabuleiros Costeiros, Aracajú, SE
  • LEONARDO MELO PEREIRA ROCHA Embrapa Milho e Sorgo, Sete Lagoas, MG
  • LAURO MOREIRA GUIMARÃES Embrapa Milho e Sorgo
  • PAULO EVARISTO GUIMARÃES Embrapa Milho e Sorgo

DOI:

https://doi.org/10.18512/rbms2020v19e1129

Palavras-chave:

Zea mays, water use efficiency, air temperature.

Resumo

The objective of this work was to evaluate commercial maize
hybrids, under conventional sprinkler irrigation, in two sowing seasons (July
and August 2017), in the municipality of Teresina, Piauí. A randomized block
design was used, with two replications and 39 treatments (commercial maize
hybrids). The characteristics evaluated were grain yield, water use efficiency,
number of ears and number of grains per area. For the experiment with sowing
done in July 2017, the average grain yield was 9.82 Mg ha-1 and the water use
efficiency was 1.9 kg m-3, which are, respectively, 4.7 % and 15.8 % higher
in relation to the experiment with sowing done in August 2017. Regardless of
the sowing season, grain yields over 10.0 Mg ha-1 of three hybrids (LG 6418,
CD 3880 PW and 2A 401 PW) stand out. The yield components, number of
kernels per ear and grain mass per ear, show high values of correlation (over
0.80) with grain yield.

Biografia do Autor

MILTON JOSÉ CARDOSO, Embrapa Meio-Norte, Teresina, PI

Engenheiro Agrônomo, D.Sc.,Fitotecnia, pesquisador

HÉLIO WILSON LEMOS CARVALHO, Embrapa Tabuleiros Costeiros, Aracajú, SE

Engenheiro Agrônomo, M.Sc., Genética e Melhoramento de Plantas, pesquisador

LEONARDO MELO PEREIRA ROCHA, Embrapa Milho e Sorgo, Sete Lagoas, MG

Engenheiro Agrônomo, M.Sc., Analista

LAURO MOREIRA GUIMARÃES, Embrapa Milho e Sorgo

Engenheiro Agrônomo, D.Sc., Genética e Melhoramento de Plantas

PAULO EVARISTO GUIMARÃES, Embrapa Milho e Sorgo

Engenheiro Agrônomo, D.Sc., Genética e Melhoramento de Plantas

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Publicado

17-10-2020

Como Citar

CARDOSO, M. J., CARVALHO, H. W. L., ROCHA, L. M. P., GUIMARÃES, L. M., & GUIMARÃES, P. E. (2020). IRRIGATED MAIZE CROP: GRAIN YIELD IN TWO SOWING SEASONS IN THE MUNICIPALITY OF TERESINA, PIAUÍ. REVISTA BRASILEIRA DE MILHO E SORGO, 19, 12. https://doi.org/10.18512/rbms2020v19e1129

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