ACOMPARATIVE EFFECT OF UROPYGEALECTOMY (IRAQI METHOD) AND ELEVATION OF DIETARY CALCIUM ON EGG PRODUCTION WITH IMPROVEMENT OF EGG SHELL FORCOM- MERCIAL LAYERS (ISA BROWN)  DURING SUMMER SEASON

I. M. Rida, S.; S. Al-Lami, J.; A. Fahd, M.; A. Nagi, S.

	ACOMPARATIVE EFFECT OF UROPYGEALECTOMY (IRAQI METHOD) AND ELEVATION OF DIETARY CALCIUM ON EGG PRODUCTION WITH IMPROVEMENT OF EGG SHELL FORCOM- MERCIAL LAYERS (ISA BROWN) DURING SUMMER SEASON
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 14, Issue 1, 2009, Pages 0-0
Authors
S. I. M. Rida; J. S. Al-Lami; M. A. Fahd; S. A. Nagi
Abstract
This study was carried out in one of the private sector company for production of table eggs in Babylon province 100km south of Baghdad during the period from the Jully 2005 to 21th of October 2005 to compare the effect of uropygealectomy (Iraqi me-thod) with elevation of dietary calcium on egg production and improvement of egg sh-ell, Haugh unit with yolk index of eggs produced from ISA Brown commercial layer during summer season in Iraq. Five hundred and seventy six commercial brown laying hens (ISA Brown) caged layers at age of 52 weeks were used in the experiment, uropygealectomy was applied f- or half of the total layers (288 layers). Hens were randomly distributed for four treatment (with four ruplicants) with144 hens for each treatment and fed with two dietary calcium level. Treatments were arranged as follow: T1=Non uropygealectomized hens fed on astandered diet with 3.5%dietary calcium(c-ontrol). T2=Uropygealectomized hens fed diet 3.5% dietry calcium. T3=Non uropygealectomized hens fed on adiet elevated it,s calcium to 4.5%. T4=Uropygealectomized hens fed on adiet with high dietary calcium 4.5%. This method was applied for the first time to improve egg shell quality with Haugh unit and yolk index in Iraq. Two weeks afterapplication of uropygealectomy, daily egg production was recorded, according to Hen Day (H.D), at the end of each experimental period. Experiment was contined for four periods, four weeks each.At the end of each period egg samples were taken to test the specific traits of egg shell as well as Haugh unit and yolk index. Result showed high significant differences (p<0.01) for the two treatments of urop- ygealectomy (T2and T4) as compared with the control treatment (T1) for all of the pro- ductive and specific traits which represents percentage of total egg production, crack- ed eggs and marketed eggs in addition to the strength of egg shell which is represented to as egg shell thickness, specific weight, Haugh unit and yolk index. Results of uropygealectomy treatments indicated also high significant differentes as compared with treatment of elevation of dietary calcium (T3) which are related to percentage of cracked eggs,marketed eggs, egg shell thickness ,specific weight of eggs in addition to Haugh unit and yolk index, while the treatment of elevation of dietary calcium of non uropygealectomy (T3) the results showed high significant differences as compared with control treatment (T1) in relation to percentage of cracked eggs, mark- eted eggs,egg shell thickness and specific weight of eggs while it was not significant for Haugh unit and yolk index.

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