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  • 1995-1999  (2)
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  • 1
    ISSN: 1573-9104
    Keywords: Asparagus ; Copper ; Iron ; Manganese ; Vegetative cycle ; Zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The essential elements copper (Cu), iron (Fe), zinc (Zn) and manganese (Mn) were analyzed in fresh asparagus to determine the effects of the vegetative cycle of the plant on the micronutrient content. Asparagus samples were classified in two groups by diameter (〈11 mm and 〉14 mm). Asparagus from a sample group with the same diameter were divided into two portions (apical and basal) according to distance from the tip. The concentrations of copper, iron, zinc and maganese increased during the vegetative cycle of the asparagus, mainly in the apical portion which showed significantly greater concentrations with respect to the basal portion. The 〉14 mm diameter asparagus presented higher levels of copper, zinc and manganese, whereas the concentration of iron was greater in the 〈11 mm diameter asparagus. The mean element levels were (mg/kg dry weight): Cu, 18.9±3.9; Fe, 91.7±33.7; Zn, 69.5±24.6 and Mn, 20.9±5.0).
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-9104
    Keywords: Asparagus ; Ripening ; Minerals ; Calcium ; Magnesium ; Sodium ; Potassium and phosphorus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The essential elements: calcium (Ca), magnesium (Mg), sodium (Na) potassium (K) and phosphorus (P) were analyzed in fresh asparagus to determine the effect of the ripening of the asparagus on the mineral content. Asparagus samples were classified in two groups by diameter (〈11 mm and 〉14 mm). Asparagus from a sample group with the same diameter were divided into two portions (apical and basal) according to distance from the tip. The concentrations of calcium, magnesium and phosphorus increased with the ripening process of the asparagus while the content of sodium decreased when the white asparagus turned into a green ripening state. No significant differences were established for potassium. The green ripening state was the group with the greater concentration of calcium, magnesium and phosphorus. Statistically significant differences (p〈0.001) were observed between portions of asparagus (tip and rest of stem) in the contents of the five mineral elements analyzed. The levels of mineral elements investigated increased notably in the tip of the asparagus with the exception of sodium and potassium of which the levels in the apical portion decreased or hardly modified. The variance analyses determined statistically significant differences (p〈0.001) in the concentration of magnesium, sodium and phosphorus between asparagus diameters (〈11 and 〉14 mm) and no significant differences (p〉0.05) were found for calcium and potassium. The mean element levels were (mg/kg dry weight): Ca=3240±1186; Mg=1818±490; Na=368±86; K=37297±4167 and P=6809±2491.
    Type of Medium: Electronic Resource
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