EFFECT OF TWO DIFFERENT SOURCES OF ZINC SUPPLEMENTATION ON PRODUCTIVE PERFORMANCE OF FRIESIAN DAIRY COWS

Document Type : Original Article

Authors

• I. M.E. Shakweer
• A. A.M. EL-Mekass
• H. M. EL-Nahas

Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture , Giza, Egypt

Keywords

• Friesian cows
• zinc methionine
• feed intake
• digestibility
• ruminal and blood parameters
• milk yield
• somatic cell counts