Shetaewi,, M. (2000). EFFECTS OF ZINC AND CORN OIL SUPPLEMENTATION ON REPRODUCTION AND GROWTH OF NEW ZEALAND WHITE RABBITS IN NORTH SINAI. Journal of Animal and Poultry Production, 25(4), 1991-2004. doi: 10.21608/jappmu.2000.258936
M. M. Shetaewi,. "EFFECTS OF ZINC AND CORN OIL SUPPLEMENTATION ON REPRODUCTION AND GROWTH OF NEW ZEALAND WHITE RABBITS IN NORTH SINAI". Journal of Animal and Poultry Production, 25, 4, 2000, 1991-2004. doi: 10.21608/jappmu.2000.258936
Shetaewi,, M. (2000). 'EFFECTS OF ZINC AND CORN OIL SUPPLEMENTATION ON REPRODUCTION AND GROWTH OF NEW ZEALAND WHITE RABBITS IN NORTH SINAI', Journal of Animal and Poultry Production, 25(4), pp. 1991-2004. doi: 10.21608/jappmu.2000.258936
Shetaewi,, M. EFFECTS OF ZINC AND CORN OIL SUPPLEMENTATION ON REPRODUCTION AND GROWTH OF NEW ZEALAND WHITE RABBITS IN NORTH SINAI. Journal of Animal and Poultry Production, 2000; 25(4): 1991-2004. doi: 10.21608/jappmu.2000.258936
EFFECTS OF ZINC AND CORN OIL SUPPLEMENTATION ON REPRODUCTION AND GROWTH OF NEW ZEALAND WHITE RABBITS IN NORTH SINAI
Department of Animal Production, College of Environmental Agricultural Sciences, Suez Canal University, El-Arish, North Sinai, Egypt.
Abstract
Thirty-six weanling and 28 adult female New Zealand White (NZW) rabbits were utilized in two consecutive experiments under North Sinai conditions. In Experiment 1, weanling rabbits (5 wk old, 644±14 g BW) were randomly assigned to four treatment groups, each included three cages with three rabbits/cage. Rabbits of all groups were fed the concentrate diet ad libitum and were offered drinking natural-underground water. The treatment groups were designated as follows: 1) a control group (Ctrl) receiving the concentrate diet (104 mg Zn, by analysis) with no additional supplements, 2) a Zn-supplemented group (Zn) receiving 30 ppm supplemental zinc as ZnSO4.5H2O in the drinking water, 3) a corn oil-supplemented group (Oil) receiving 5 g.head-1.d-1 of corn oil added to the diet and 4) a Zn+corn oil-supplemented group (ZnOil) receiving 5 g.head-1.d-1 of corn oil added to the diet plus 30 ppm supplemental zinc as ZnSO4.5H2O in the drinking water. At the end of the 56-day growing period, 24 rabbits were chosen at random and slaughtered; serum samples were analyzed for selected constituents and carcass traits were evaluated. The ZnOil group had the highest average daily gain (25 g/d) followed by the Oil group (23.5 g/d), whereas the Zn and the Ctrl groups were almost similar. Daily feed intake did not differ (P>.10) due to treatment. Feed efficiency was improved by 32% in the ZnOil and Oil groups compared with the Ctrl (P<.05). Changes in serum metabolites are tabulated and discussed. Dressing percentages were increased (P<.05) with addition of corn oil or Zn plus corn oil.
In Experiment 2, the doe rabbits were individually housed in galvanized wire hutches and had free access to natural-underground water. The doe rabbits were divided into 1) a control group (DOE1) receiving ad libitum the concentrate diet (104 ppm Zn) with no additional supplements, and 2) a treated group (DOE2) receiving the control diet ad libitum plus 10 g.head-1.d-1 of corn oil added to the diet and 40 ppm supplemental Zn as ZnSO4.5H2O in the drinking water. Supplementation began 1 month before breeding and continued during pregnancy through lactation until weaning of the offspring at 25 d of age. Percentage of the does kindled/does bred did not differ (P>.10) between treatments. Compared to the control group, DOE2 had significantly higher litter size alive at birth. Pre-weaning mortality was lower (P<.05) in the DOE2 group than the DOE1 (35.2 vs 42.4 %). Litter size at weaning was higher (P<.05) in the DOE2 group than the DOE1 (4.18 vs 3.17 ± .5).Litter weaning weight was higher (+ 52 %, P<.05) and bunny weaning weight tended to be higher (+ 7 %, P>.10) in the DOE2 group than the DOE1.
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