| Popis: |
This article presents the results of studies on the violation of mineral metabolism in highly productive cows in conditions of intensive milk production. The diet of highly productive cows has an excess of raw and digestible protein, crude fat, Na, Cl, Ca, P, Mg, K, Fe, Cu and a pronounced deficiency of crude fiber, starch, sugar, carotene and zinc. The carbohydrate-protein ratio was 0,64 (norm 1,0–1,2), the Ca : P ratio was 1,39 (norm 1,4–1,5). The imbalance of the diet in protein and carbohydrates caused the development of osteodystrophy in cows with excessive content of Ca and P in the diet and their almost normal ratio. The pathogenesis of mineral metabolism disorders is associated with the accumulation of ketone bodies in the body of animals caused by protein over-feeding. Ketone bodies affect the hormonal system that regulates mineral metabolism. |
