Soil and foliar zinc biofortification in field pea (Pisum sativum L.): Grain accumulation and bioavailability in raw and cooked grains

Maria Poblaciones Suarez-Barcena, Z. Rengel

    Research output: Contribution to journalArticle

    29 Citations (Scopus)

    Abstract

    To evaluate the potential of cooked field peas to be used in Zn biofortification programs, all combinations of soil Zn application of 0, 4 and 8 mg ZnSO4·7H2O kg-1 and foliar Zn application of 0 and two sprays of 0.25% or 0.5% (w/v) ZnSO4·7H2O before flowering and at early grain-filling stage were tested. Soil Zn application increased Zn-DTPA concentration 3.7- to 5.6-times depending on the Zn soil treatments. Grain Zn concentrations higher than 60 mg Zn kg-1 were obtained with all foliar Zn applications, alone or in combination with soil Zn applications, and grain Zn bioavailability was adequate (phytate:Zn ratios lower than 15). Processing (freezing and cooking) caused a decrease of about 30% in grain Zn concentration and a 17%-increase in phytate:Zn ratios (to ≤9.5). The combined application of 8 mg ZnSO4·7H2O kg-1 soil + 0.25% (w/v) ZnSO4·7H2O foliarly could be a good option for biofortifying field peas.

    Original languageEnglish
    Pages (from-to)427-433
    Number of pages7
    JournalFood Chemistry
    Volume212
    DOIs
    Publication statusPublished - 1 Dec 2016

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