African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6638

Full Length Research Paper

Phenological and grain yield response of hybrid maize varieties, released for differing agro-ecologies, to growing temperatures and planting dates in Ethiopia

Tesfaye Balemi
  • Tesfaye Balemi
  • Ethiopian Institute of Agricultural Research, Addis Ababa, P. O. Box 2003, Ethiopia.
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Mesfin Kebede
  • Mesfin Kebede
  • ILRI/CIMMYT Ethiopia, Addia Ababa, Addis Ababa, P. O. Box 5689, Ethiopia.
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Begizew Golla
  • Begizew Golla
  • Ethiopian Institute of Agricultural Research, Addis Ababa, P. O. Box 2003, Ethiopia.
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Tocha Tufa
  • Tocha Tufa
  • Ethiopian Institute of Agricultural Research, Addis Ababa, P. O. Box 2003, Ethiopia.
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Girma Chala
  • Girma Chala
  • Ethiopian Institute of Agricultural Research, Addis Ababa, P. O. Box 2003, Ethiopia.
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Tolera Abera
  • Tolera Abera
  • Ethiopian Institute of Agricultural Research, Addis Ababa, P. O. Box 2003, Ethiopia.
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  •  Received: 30 July 2020
  •  Accepted: 03 November 2020
  •  Published: 31 December 2020

Abstract

Growing temperatures and planting dates affect phenology and grain yields of maize varieties and farmers have to choose suitable varieties that fit into different planting dates and growing temperatures. A field experiment was conducted to investigate the response of different hybrid maize varieties to different growing temperatures through growing the varieties at different locations varying in altitudes (low land, mid altitude and highlands) under three planting dates. Results revealed that days to seed emergence were influenced by growing temperatures, with days to emergence difference of two weeks observed between Didesa/Uke (high temperature locations) and Holeta (low temperature location). Almost for all varieties except for BH546, days to tasseling and maturity were longer under low temperature at Holeta while they were shorter under high temperature at Didesa and Uke. Early planting resulted in higher grain yields especially at Uke, Bako and Ambo. Grain yield was influenced by the interaction effect of variety and temperature, with BH546 being more yielder than AMH851 under high temperature at Uke. Thus, for most of the tested varieties early planting is recommended, as this will enable the varieties to escape moisture stress that occasionally occurs at grain filling and maturation period, which can seriously affect grain yield.

Key words: Growing temperature, grain yield, maize phenology, maize varieties, planting date.