Iron requirement of chicks fed a semipurified diet based on casein and soy protein concentrate.
An Fe depletion and repletion study was conducted to determine the Fe requirement of chicks fed a casein-dextrose diet containing soy protein concentrate. Weight gain, hematocrit, hemoglobin, and serum total Fe showed marked increases when graded levels (0, 5, 10, 20, 30, 40, and 50 mg/kg) of Fe from analytical grade FeSO4.7H2O were added to an Fe-deficient basal diet containing 46.5 mg Fe/kg. Subjecting the hemoglobin data to broken-line analysis indicated that the Fe requirement was 38.5 mg/kg of supplemental Fe (i.e., total dietary Fe of 85 mg/kg). Heart hypertrophy was observed in Fe-deficient chicks, but Fe supplementation (more than 20 mg/kg) alleviated the problem.
Aoyagi
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S
Department of Animal Sciences, University of Illinois, Urbana 61801, USA.
Baker
D H
DH
D000818:Animals; D002364:Caseins / Q000008:administration & dosage*; D002645:Chickens / Q000502:physiology; D004044:Dietary Proteins / Q000008:administration & dosage; D004435:Eating; D006400:Hematocrit; D006454:Hemoglobins / Q000032:analysis; D007501:Iron / Q000008:administration & dosage* / Q000097:blood; D009751:Nutritional Requirements; D014674:Plant Proteins, Dietary / Q000008:administration & dosage*; D030262:Soybean Proteins; D015430:Weight Gain
D002364:Caseins; D004044:Dietary Proteins; D006454:Hemoglobins; D014674:Plant Proteins, Dietary; D030262:Soybean Proteins; D007501:Iron