THE EFFECT OF DIETARY SUPPLEMENTATION WITH COPPER SULPHATE OR COPPER CHLORIDE ON LOCAL MAMOURAH STRAIN LAYING HENS: 1- EFFECT OF DIETARY COPPER LEVEL AND SOURCE ON PERFORMANCE, EGG PRODUCTION, EGG QUALITY AND GIZZARD STRUCTURE OF LAYING HENS. | ||||
| Journal of Animal and Poultry Production | ||||
| Article 6, Volume 27, Issue 10, October 2002, Page 6677-6688 PDF (3.42 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2002.256764 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Nadia I. EI-Awady,; Amina A. Salem; Eman A. Abo-Etta; M. E. Nofal | ||||
| Animal Production Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| An experiment was conducted using 120 hens of Mamourah local strain of 36 weeks of age. The basal diet was formulated to meet the nutrient requirements of this local strain. Diets with 4 dietary copper concentrations 0, 500, 750 and 1000 mg/kg diet from 2 different sources, copper sulphate (CUS04. 5 H20) and copper chloride (CuCI2. 2 H20) were formulated and randomly distributed in such a way that each diet was fed to 15 cages of birds. The feeding trial continued for 56 days. Results showed that body weight of hens increased by feeding copper supplemented diet in the first 4 weeks of the experimental period. Copper chloride as a source of copper recorded significant (P<0.05) increase in egg number (about 10.3%) as compared to the copper sulphate during 8 weeks of feeding. Addition of 1000 mg/kg diet reduced the egg number as compared to the other levels in the same period. Feeding levels of copper as two sources for 4 or 8 weeks was without influence on egg weight. Feed consumption tended to be increased by copper supplements in the first 4 weeks of feeding but decreased at 8 weeks of feeding. Addition of 1000mg/kg diet from the two sources of copper recorded numerical decrease in Haugh Units (HU) during two periods. Copper yolk recorded high values as compared to the other components (white and shell) of egg during the two periods of feeding. Excreta Cu was increased by dietary supplements. Egg quality was not affected by dietary supplements during the two experimental periods except that for shell thickness was significantly (P<0.05) increased. Histological examination of the gizzard indicated that the two highest levels of copper chloride (750 and 1000 mg/kg diet) exhibited considerable thickness and damage to the gizzard lining. The variation in tested prameters values could be attributed to differences in strain or seasonal conditions. | ||||
| Keywords | ||||
| Copper; layinghens; . Histological; Egg quality | ||||
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