Nutrient Composition of Sweetpotato Storage Roots Altered by Frequency of Nutrient Solution Change

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  • 1 Food Science, Tuskegee University, Tuskegee, AL 36088
  • | 2 George Washington Carver Agricultural Experiment Station, Tuskegee University, Tuskegee, AL 36088

The sweetpotato [Ipomoea batatas (L.) Lam] breeding clone TU-82-155 was grown during Spring 1990 and Summer 1991 in standard Tuskegee Univ. (Alabama) growth channels (0.15 × 0.15 × 1.2 m) for 120 days in a greenhouse using a hydroponic (nutrient film) system with a modified half-strength Hoagland nutrient solution. The nutrient solution was changed every 2, 14, or 28 days. Total N, oil, ash, amino acid, vitamin, and mineral concentrations in storage roots generally were higher and dry weight and starch concentration were lower with 2-day solution changes than with those less frequent.

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