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    Optimizing root yield of cassava under fertigation and the masked effect of atmospheric temperature

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    Journal Article (1.524Mb)
    Date
    2020-09
    Author
    Omondi, J.O.
    Yermiyahu, U.
    Rachmilevitch, S.
    Boahen, S.
    Ntawuruhunga, P.
    Sokolowski, E.
    Lazarovitch, N.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    BACKGROUND Fertigation is a rare and an expensive method of fertilizer application to cassava, and hence there is a need to optimize its efficiency for profitability. This study's objective was to optimize root yield of cassava through fertigation using a logistic model. RESULTS The field treatments were six fertigation concentrations against three cassava varieties, selected according to their maturity period. The logistic model predicted 52%, 116% and 281% benefit of fertigation for the varieties Mweru, Kampolombo and Nalumino, respectively. Furthermore, only half of the amount of fertilizer applied for Mweru was required to achieve twice the root yield of Kampolombo. During the experiment, an unknown importance of atmospheric temperature to cassava and its relationship to fertigation was observed. An elevation of 3.7 °C in atmospheric temperature led to 226%, 364% and 265% increase in root yield of Mweru, Kampolombo and Nalumino, respectively. Conversely, shoot biomass and root yield declined when the average atmospheric temperatures dropped by 3.6 °C. However, the cold temperatures affected the short‐growth‐duration (Mweru) and medium‐growth‐duration (Kampolombo) varieties earlier, 22 days after the drop, than the long‐growth‐duration variety (Nalumino) – 50 days after the drop. CONCLUSION Fertigation induced resilience of the shoot biomass production to cold which was most pronounced in the root yield of Mweru in response to the highest fertigation concentration. Thus, while fertigation improved cassava's resilience to cold, it only did so effectively for short‐growth‐duration variety, Mweru. Also, enhanced performance of cassava under increased atmospheric temperature indicated its importance as a climate‐smart crop.
    https://dx.doi.org/10.1002/jsfa.10519
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7698
    IITA Authors ORCID
    Stephen Boahen Asaberehttps://orcid.org/0000-0001-8946-401X
    Pheneas Ntawuruhungahttps://orcid.org/0000-0003-2330-9070
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1002/jsfa.10519
    Research Themes
    Biotech and Plant Breeding; Plant Production and Health
    IITA Subjects
    Agronomy; Cassava; Plant Breeding; Plant Health; Plant Production; Soil Fertility
    Agrovoc Terms
    Growth; Fertilizers; Irrigation; Nutrients; Models; Root Crops; Cassava
    Regions
    Africa; Southern Africa
    Countries
    Zambia
    Hubs
    Eastern Africa Hub
    Journals
    Journal of the Science of Food and Agriculture
    Collections
    • Journal and Journal Articles4835
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