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    Assessment of nitrogen uptake and utilization in drought tolerant and Striga resistant tropical maize varieties

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    S13ArtKamaraAssessmentInthomDev.pdf (156.5Kb)
    Date
    2013-04
    Author
    Kamara, A.
    Ewansiha, S.U.
    Menkir, A.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Maize (Zea mays L.) is an important food crop in the Guinea savannas of Nigeria. Despite its high production potential, drought, Striga hermonthica parasitsim, and poor soil fertility particularly nitrogen deficiency limit maize production in the savannas. Breeders at IITA have developed drought- and Striga-tolerant cultivars for testing, dissemination, and deployment in the region. Information on the response of these cultivars to N fertilization is, however, not available. This study evaluated grain yield, total N uptake (TNU), N uptake (NUPE), N utilization (NUTE), and N use efficiency (NUE) of selected maize cultivars along with a widely grown improved maize cultivar at two locations in the Guinea savannas of northern Nigeria. Maize grain yield increased with N application. The average grain yield of the maize cultivars was 76% higher at 30, 156% higher at 60, and 203% higher at 120 kg N ha?1 than at 0 kg N ha?1. This suggests that N is a limiting nutrient in the Nigerian savannas. Five drought-tolerant cultivars produced consistently higher yields when N was added at all levels. These cultivars had either high NUPE or NUTE confirming earlier reports that high N uptake or NUTE improves maize grain yield. The study also confirms earlier reports that maize cultivars that are selected for tolerance to drought are also efficient in uptake and use of N fertilizer. This means that these cultivars can be grown with application of less N fertilizer thereby reducing investment on fertilizers and reduction in environmental pollution.
    https://dx.doi.org/10.1080/03650340.2013.783204
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1064
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1080/03650340.2013.783204
    IITA Subjects
    Maize
    Agrovoc Terms
    Maize; Striga; Cultivars; Nitrogen Fertilizers; Drought Tolerance
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Archives of Agronomy and Soil Science
    Collections
    • Journal and Journal Articles4835
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