Study on the relation among some economic and biochemical indicators with the qualitative composition of grazing in beef cattle

摘要

The study was carried out on 36 cows of meat breeds, such as Hereford, Aberdeen-Angus and Limousine in the Experimental Base of RIMSA in the town of Troyan. An assessment of the general body condition was determined (GBC). Blood samples from these animals were gathered and analyzed. Grass samples were subjected to laboratory testing through a classic Weende method in order to determine nutrients and chemical composition.It has been found that the general body condition is directly related to the protein content of grass for beef cattle in the conditions of free pasture farming. The calcium and phosphorus content in blood serum is dependent on the content of the elements in the grass. TheAberdeen-Angus breed showed the best metabolic activities in the pastures used.