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    Canopy cover evolution, diurnal patterns and leaf area index relationships in a Mchare and Cavendish banana cultivar under different soil moisture regimes

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    Journal Article (1.688Mb)
    Date
    2020-10
    Author
    Stevens, B.
    Diels, J.
    Vanuytrecht, E.
    Brown, A.
    Bayo, S.
    Rujweka, A.
    Richard, E.
    Ndakidemi, P.A.
    Swennen, R.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    The biggest abiotic threat to banana (Musa spp.) production is water deficit, but physiological indicators in plantations are lacking. Canopy Cover (CC) seems to be a relevant parameter, but so far not used in banana fields. Field experiments were conducted to determine the effect of optimal irrigation (FI) versus rainfed (RF) on CC and Leaf Area Indices (LAI) in two experiments with different cultivars (Mchare ‘Huti Green’ [HG, AA] and Cavendish ‘Grand Naine’[GN, AAA]) (n = 3 for HG, n = 4 for GN) until harvest of cycle 1 (C1), studying C1 and C2 plants. Soil moisture was followed using Time Domain reflectometry. CC and LAI were reduced 8–9 weeks after the start of soil moisture divergence between RF and FI treatments in both experiments (p < 0.05), leading to a reduction in CC growth rate (r) and maximum CC (CCmax) in RF plots (p < 0.05). On a daily timescale, CC varied diurnally (i.e. was reduced) under high evaporative demands, whereby soil moisture depletion increased the CC reduction. Cultivar specific CC-LAI curves were created following the Lambert-Beer equation, whereby HG had a lower extinction coefficient than GN (0.52 vs. 0.67). CC growth over time seems a promising indicator for water deficit in the field. Diurnally, CC is more affected by evaporative demand than soil moisture depletion, although soil moisture depletion increases CC diurnal drops under high ET0.
    https://dx.doi.org/10.1016/j.scienta.2020.109328
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6951
    IITA Authors ORCID
    Allen Brownhttps://orcid.org/0000-0002-4468-5932
    Rony Swennenhttps://orcid.org/0000-0002-5258-9043
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1016/j.scienta.2020.109328
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Banana; Plant Breeding; Plant Production
    Agrovoc Terms
    Bananas; Canopy; Leaf Area Index; Soil Moisture; Irrigation; Drones (Insects); Abiotic Stress; Climate Change
    Regions
    Africa; East Africa
    Countries
    Tanzania
    Hubs
    Eastern Africa Hub
    Journals
    Scientia Horticulturae
    Collections
    • Journal and Journal Articles4835
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