Co-Authors:
Landau, S., Department of Natural Resources, Institute of Field and Garden Crops, Agricultural Research Organization, PO Box 6, 50250 Bet Dagan, Israel
Nitsan, Z., Department of Poultry Science, Institute of Animal Science, Agricultural Research Organization, PO Box 6, 50250 Bet Dagan, Israel
Zoref, Z., Department of Poultry Science, Institute of Animal Science, Agricultural Research Organization, PO Box 6, 50250 Bet Dagan, Israel
Madar, Z., Dept. of Biochem. and Hum. Nutrition, Hebrew University of Jerusalem, PO Box 12, Rehovot 76100, Israel
Abstract:
Glucose metabolism was studied in 31 pregnant ewes fed mixtures (50:50) of chopped alfalfa hay and corn grain given in whole (HWC) or extruded form (HEC). Number of fetuses was 1 (n = 10), 2 (n = 11) or 3 (n = 10). Diets were supplied at three dietary levels: maintenance (1.0 M), 1.25 x maintenance (1.25 M) or twice maintenance (2.0 M). Glucose metabolism was estimated by a double isotope dilution procedure at days 97-121 of pregnancy. Glucose entry rate (GER) was higher (P < 0.04), and glucose irreversible loss rate (GILR) tended to be higher (P < 0.07) in ewes given HEC than HWC. Dietary level (P < 0.001) and the number of fetuses (P < 0.005) affected GER and GILR positively. These results provide a probable explanation for higher birth weights previously found in lambs born to HEC-, compared with HWC-fed dams. (C) Inra/Elsevier, Paris.
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