RESPONSE OF GIMMIZAH AND MAMOURAH LOCAL STRAINS TO INDUCING FORCE MOLTING BY IODINE AND CLOMIPHENE | ||||
| Journal of Animal and Poultry Production | ||||
| Article 3, Volume 27, Issue 12, December 2002, Page 8133-8155 PDF (854.75 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2002.257643 | ||||
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| Authors | ||||
| M. A. Ibrahim,; Amina A. Salem; H. A. Abuo Khashaba | ||||
| Animal Production Institute, Agriculture Research Center, Ministry of Agriculture, Egypt. | ||||
| Abstract | ||||
| Three groups of hens from each strain of Gimmizah (G) and Mamourah (M) were randomly assigned to 3 treatments. The treatments were the control, 500 PPm potassium-Iodine (P.I.) and 17 mg/kg live weight clomiphene citrate (Clom). The application of force molting treatments continued for 10 days. The G hens were significantly heavier than M ones after treatments,4,8 and 12 weeks post molting. The two strains lost nearly equal percentages of live body weight after treatments . The G hens were significantly earlier in egg laying cessation after molting than M ones. However, the M hens reached the days of first egg, 50% and peak of production post molting earlier than G ones. Similarly, M hens had significantly had better value of the laying (%) at peak of egg production and H.D.% than G ones at the intervals 0-4, 4-8, 8-12 and 0-12 week post molting. Also, M hens had significantly better values of egg mass/hen and feed conversion by 13.1 and 16.3%, respectively. The G hens had significantly better values of egg weight, egg shape index, shell weight percentage, meanwhile, the opposite was true in respect of Haugh units, yolk weight percentage and yolk index. The G hens had significantly higher values of relative live body weight of liver and ovary after molting and oviduct length at the end of experiment than M ones. Meanwhile, the opposite was true in relative live body weight of oviduct and oviduct length after treatment and ovary and oviduct at the end of experimental period where M hens had significantly higher value than G ones. The plasma total protein, globulin, cholesterol, inorganic phosphorus, GOT and GPT after treatment also, alb./glo.ratio, GOT and progesterone at the end of study were significantly higher in M hens than G ones. However, M hens was slightly higher than G ones in almost other studies plasma contents except globulin at the end of the study and alb./glo. ratio after treatment without significant differences.The hens of Clom. and P.I. groups lost 14.2 and 9.9% of live weight at the end of force molting treatments in comparison to the control. Differences in live body weight at 0,4,8 and 12 weeks post molting due to force molting treatment were significant. The force molting treatment had significant effects on the day of laying cessation, first egg, 50% and peak of egg production as well as the laying rate (%) at peak and H.D.% during the second laying cycle. The best values of H.D.% during the intervals 4-8, 8-12 and 0-12 week were recorded for the Clom. group, the egg quality traits studied varied according to force molting treatment after 10 weeks post molting. It was observed, in general, that force molting improved the quality traits than the control group. Egg mass/hen and feed conversion were significantly improved by force molting and the best values were recorded for Clom. group, however, the P.I. group ranked the second in that respect.The force molting had significant effects on internal organs studied where the control group had better values than force molted groups after treatment. However, the opposite situation was found at the end of the study. The plasma total protein, albumin, globulin, alb./glo. ratio, total calcium, cholesterol, inorganic phosphorous, GOT, GPT and progesterone concentration studied were significantly varied according to force molting method after treatment and at the end of the experiment.Generally speaking, although the two force molting treatments resulted in obviously positive results than the control, the Clom. treatment gave the best results in respect of most studied traits. So, it could be advised to use force molting by using clomiphene citrate at 17 mg/kg live body weight level as a molting procedure for 10 days to maximize the productivity of laying parent stocks of local strains. | ||||
| Keywords | ||||
| layers; force molting; clomiphene | ||||
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