THE EFFECT OF FEED RESTRICTION DURING THE REARING PERIOD ON CARCASS TRAITS AND PLASMA BIOCHEMICAL CONSTITUENTS FOR TWO LOCAL BREEDS OF CHICKENS | ||
| Journal of Animal and Poultry Production | ||
| Article 4, Volume 27, Issue 7, July 2002, Pages 4451-4462 PDF (805.6 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2002.255736 | ||
| Authors | ||
| A. A. Abdalla,; Nazla Y. Abou-EI-Ella; Yousria K. Afify; A. A. Abd EI-Glil | ||
| Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture, Giza, Egypt. | ||
| Abstract | ||
| Two hundred and sixty four, four weeks old Gimmizah (G) and Golden Montazah (GM) males were divided randomly into two equal groups (treatments). The control group was fed ad·libitum from 4·16 wks of age. While the second group was quantitatively restricted, (by skip-a-day) from 4·12 wks of age, qualitative restriction was applied from 12·16 wks. Where birds were fed a diet containing 12 % protein, comparing the c.ontrol group which was fed a diet containing 16.86 % protein. Birds of the two groups were fed a diet containing 15.45 % protein from 16 to 20 wks of age ad·libitum, Oata concerning live body weight, carcass traits, chemical carcass analysis and some blood constituent were.recorded. Regardless of feeding program, live body and carcass weights for G chicks were significantly heavier than those of GM at either studied ages. Regardless of chickens, the control group was significantly heavier than the quantitatively or the qualitatively restricted groups The percentages of G meat yield and edible parts at 16 wks of age were significantly higher than GM during the entire experimental period. However, after refeeding period, the adverse effect of restriction disappeared. Percentage of . abdominal fat of GM was significantly higher than that of G one, Furthermore. RG showed decreased percentage of abdominal fat than control one at 20 wks of age. The G consumed significantly more protein and energy than GM at 16 and 20 wks of age. Control birds consumed significantly more protein and energy than RG group at 16 and 20 wks of age. Chemical analysis of legs and breast meat at 16 and 20 wks of age were insignificantly affected 5 or T. The dry matter (OM), ether extract (EE) and crude ash percentages of legs were significantly higher than those of breast contents, but the opposite was true for crude protein (CP) content. At 20 wks of age. strain (5) had insignificant effect on OM and ash percentages. While CP percentage of G surpassed that of GM, the opposite was true for EE percentage. Generally, feeding treatments were insignificantly effective on the carcass chemical analysis. Percentages of OM, EE and crude ash for legs were significantly higher than those of breast. while. the opposite was true for CPo Averages of plasma albumin (PA). total protein and glucose levels for G were significantly ·higher than GM at 16 wks of age. Plasma glubulin (PG) and PAlPG ratio were insignificantly affected by S. Feeding treatments, however insignificantly affected PG, PAlPG and total protein levels. The level of PA for control birds was significantly higher than RG birds while the opposite was found for glucose level. Level of glutamic purovic oxaloacetic transaminase (GPT) was inSignificantly affected by S, but glutamic oxaloacetic transaminase (GOT) level for GM was higher than G. Moreover, the levels of GPT and GOT for RG birds were significantly higher than those for control birds. At 20 weeks of age, S insignificantly affected all previously blood constituents. only the glucose level was higher for G than GM. While The PC level was higher for control birds compared to RG. the opposite was found for that of PAlPG. Generally, treatments insignificantly affected the other investigated blood constituent. | ||
| Keywords | ||
| feed restriction; growth. carcass; carcass analysis and blood constituent | ||
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