THE EFFECT OF EARLY FASTING INTERVALS ON THE PERFORMANCE OF GIMMIZAH AND BAHEIJ PULLETS | ||||
| Journal of Animal and Poultry Production | ||||
| Article 3, Volume 28, Issue 7, July 2003, Page 5238-5252 PDF (2.16 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2003.252527 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Nazla Y. Abou-EI·Ella,; Yousria K. Afify; M. M. Khalifah; Mervat A. Breikaa | ||||
| Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture, Cairo, Egypt. | ||||
| Abstract | ||||
| The effect of short periods of fast early in production on subsequent performance of Gimmizah (G) and 8aheij (B) laying hens was studied. When hens reached 10% production, fasting program was used, Hens were assigned randomly to four groups (3 replicates, 10-13 hens each) in floor rearing houses. Those groups were: the full fed group (control) and the three treated groups which food was fast for 5,7, and 9 days. The G pullets were significantly (P<O.OO1) heavier than 8 ones at the different ages studied. The G showed more reduction in body weight (8W) than 8 while the later grew faster than G -atter refeeding. up to the end of experimental period (at about 56 weeks of age). Control pullets were significantly heavier than any of the treated ones at all ages studied. The G pullets produced significantly more eggs than 8 during the first six weeks post fasting, and during (1-28 wks). No significant effect of fast periods on either EN or RL during all periods studied. Early eggs produced by G pullets were significantly heavier than that set by 8 ones during all periods studied except that during the 3'0 week. During the 6't-week post fasting, the 9-day fast pullets produced eggs significantly lighter than those produced by the other groups. The G hens produced significantly higher percentage of large and extra large of eggs during the early interval of laying (1·6 wk) than 8 ones but G pullets produced twice percentage of extra large eggs during 1-28 wk interval. The 9-day fast hens produced significantly more small eggs than the other ones. Both 7-day and 9- day fast produced larger percentages (but not significant) of extra large eggs than the other two groups. The G pullets had higher viability value than 8 ones and either of the 5- and 7 -day fast pullets had higher viability than both the control or -9 day fast pullets. The G strain significantly (P<O.001 to P<0.05) surpassed 8 one during the early periods while no significant effect of strain on feed conversion (FC) during the long interval. The 5-day and -9- day fast pullets had the best FC (P<O.05) during the 2nd and 6ihweek post fasting. There was a significant reduction of fertility and hatchability of fertile eggs in 8 eggs, also chick body weight at hatch (CBW) for G was significantly (P<0.001) heavier than that of 8 one. Fasting period affected (P<0.01) HFE, piped embryos and CBW. Eggs which produced by 7- and 9-day fast pullets showed highest HFE than those of eggs produced by control or 5-day fast pullets. Moreover, while no piped embryos (PEj were found in the eggs produced by 7- and 9- day fast pullets, eggs set by control or 5- fast pullets had (3.70 and 2.22%) PE. In general, the results showed that there were improving in FC, viability and some of hatch traits while no significant effects of fast program used were found on the egg production traits studied of Baheij and Gimmizah pullets. | ||||
| Keywords | ||||
| chicken; fast; body weight; egg production; egg weight classification; feed conversion; viability; hatch traits | ||||
|
Statistics Article View: 42 PDF Download: 181 |
||||
