The effect of dietary supplementation with copper sulphate or copper chloride on local Manourah strain laying hens: 2- Effect of dietary copper source and concentration on total lipids, yolk and plasma cholesterol of laying hens
Abstract: An experiment was conducted to test the hypothesis that pharmacological levels of dietary copper could reduce egg cholesterol content. Local Mamourah strain hens 36 weeks of age were fed com and soybean meal diets with 0, 500, 750 and 1000 mg/kg diet as copper sulphate (CuS04. 5H2O) and copper chloride (CuCI2. 2 H2O). At the end of experimental periods (28 and 56 days, respectively) three eggs per group were randomly taken to determine yolk cholesterol and total lipids.
Results obtained were as follows:
- A significant (P<0.05) decrease in blood hemoglobin value (Hb) was observed at 500 mg/kg diet of copper source during the two experimental periods. Hb value was not affected by changing the dietary Cu source.
- A negative decrease in Cu plasma concentration was observed for different levels and sources of copper.
- Increasing dietary copper from zero to 1000 mg/kg diet the amount of cholesterol in plasma and yolk decreased linearly (P<0.05) and numerically. Levels at 750 and 1000 mg/kg diet decreased the plasma and yolk cholesterol by about 7.52, 19.40, 20.62 and 30.92%, respectively, during 8 weeks of experimental period.
- Copper supplementation positively affected plasma total lipids.
- Yolk lipids could be lowered substantially (15.78%) by the addition of 1000 mg/kg diet when compared with control group.
- Liver weight per unit body weight was depressed for 500 and 750 mg Ikg diet of copper source.
- Cu concentration in the liver increased for all dietary levels.
These results suggested feed pharmacological levels and sources of copper ro laying hens will produce some physiological responses depending on the strain type and duration of feeding.
Keywords: Copper, laying hens, lipids, cholesterol
Publication year 2002
Pages 6689-6695
Availability location معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
Availability number
Organization Name
City المنصورة
serial title Journal Agricultural Science Mansoura University
ISSN 1110-0346
Author(s) from ARC
Agris Categories Animal physiology - Nutrition
AGROVOC
TERMS		 Cholesterol. Copper sulphate. Layer chickens.
Proposed Agrovoc copper chloride;Manourah strain;total lipids;plasma cholesterol;yolk cholesterol;
Publication Type Journal
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