Effect of zeolite on the chemical composition of milk from Serbian Spotted dairy cattle
2011
Đoković, R., Faculty of Agronomy, Čačak (Serbia) | Ilić, Z., Faculty of Agriculture, Lešak (Serbia) | Petrović, M.P., Institute for Animal Husbandry, Belgrade-Zemun (Serbia) | Pešev, S., FSH Agromil, Pojate (Serbia) | Ristanović, B., Faculty of Agriculture, Lešak (Serbia)
Milk yield and milk chemical composition are largely affected by the quality of dairy cattle diet. The chemical composition of milk is dependent upon a large number of factors, including breed, diet, care, housing system, stage of lactation, etc. Milk composition is primarily a breed-specific trait. This study was conducted over a period of 15 months, involving Serbian Spotted dairy cattle. The experimental animals were assigned to three groups, each receiving different levels of supplemental zeolite. The control group comprised cows that received no zeolite supplement. Experimental Groups 1 and 2 were fed compound feeds supplemented with 4% and 2% zeolite, respectively. Milk samples were analysed for the contents of milk fat, proteins, fat-free solids and lactose, and density. The results obtained suggest that zeolite supplementation affects milk chemical composition, depending on the zeolite level present in livestock feed.
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