title: Soil and foliar zinc biofortification in field pea (Pisum sativum L.): Grain accumulation and bioavailability in raw and cooked grains.
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 8mgZnSO4·7H2Okg(-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 60mgZnkg(-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 8mgZnSO4·7H2Okg(-1) soil+0.25% (w/v) ZnSO4·7H2O foliarly could be a good option for biofortifying field peas.
authors.affiliation: Department of Agronomy and Forest Environment Engineering, University of Extremadura Avda., Adolfo Suárez s/n, 06007 Badajoz, Spain; School of Earth and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia. Electronic address: majops@unex.es.
authors.forename: M J
authors.initials: MJ
authors.lastname: Poblaciones
authors.affiliation: School of Earth and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
authors.forename: Z
authors.initials: Z
authors.lastname: Rengel
mesh_terms: D000072759:Biofortification / Q000379:methods*; D001682:Biological Availability; D003296:Cooking / Q000379:methods*; D002523:Edible Grain / Q000737:chemistry* / Q000378:metabolism; D005308:Fertilizers / Q000032:analysis; D018532:Pisum sativum; D012987:Soil / Q000737:chemistry*; D019287:Zinc Sulfate / Q000008:administration & dosage / Q000032:analysis* / Q000378:metabolism
chemical_list: D005308:Fertilizers; D012987:Soil; D019287:Zinc Sulfate
keywords: Agronomic biofortification; Foliar fertilization; Phytic acid; Zinc deficiency; Zinc fertilizers