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    Plant density and nitrogen responses of maize hybrids in diverse agroecologies of west and central Africa

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    Journal Article (706.3Kb)
    Date
    2021
    Author
    Ajayo, B.
    Badu-Apraku, B.
    Fakorede, M.
    Akinwale, R.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Maize (Zea mays L.) production in West and Central Africa is constrained by drought, low soil-N and Striga infestation. Breeders in the region have developed and commercialized extra-early and early-maturing hybrids (E-EH and EH), which combine high yield potentials with tolerance/resistance to the three stresses. Hybrids of both maturity groups are new to the farmers; thus, the urgent need to recommend appropriate agronomic practices for these hybrids. We investigated the responses of four hybrids belonging to extra-early and early-maturity groups to plant density (PD) and nitrogen (N) application in five agroecologies. The EHs consistently out-yielded the E-EHs in all the five agroecologies. The hybrids showed no response to N-fertilizer application above 90 kg ha-1. All interactions involving N had no significant effect on all traits except in few cases. The E-EHs and EHs had similar response to PD; their grain yield decreased as PD increased. Contrarily, flowering was delayed and expression of some other agronomic traits such as plant and ear aspects became poorer with increased PD. Optimal yield was obtained at approximately 90 kg N ha-1 and 66,666 plants ha-1. Most of the measured traits indicated high repeatability estimates (i.e. ≥ 60) across the N levels, PDs and environments. Evidently, the hybrids were intolerant of high PD.
    https://dx.doi.org/10.3934/agrfood.2021023
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7082
    IITA Authors ORCID
    Babatope Samuel Ajayohttps://orcid.org/0000-0002-4167-2263
    BAFFOUR BADU-APRAKUhttps://orcid.org/0000-0003-0113-5487
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3934/agrfood.2021023
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Maize; Plant Breeding; Plant Production
    Agrovoc Terms
    Maize; Agronomic Characters; Hybrids; Nitrogen; Plant Population; Nigeria; Plant Density
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    AIM Agriculture and Food
    Collections
    • Journal and Journal Articles4835
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