The use of wastes from the fat-and-oil industry in feeding calves in order to improve environmental safety

The present article provides the results of the commercial farm-based scientific trial conducted in calves up to six months of the age. In the rearing period of young animals, a promising technology would be the way, when premixes are included in the diet in the dairy period. The conducted study showed that the use of fat and oil industry waste as the basis for premixes helps to solve several problems, namely, to expand the ingredient list and provide alternative materials for farm animals, which allows to increase the protein level in animal diet, as well as to solve the problem of disposal the waste from the fat-and-oil industry. The experiment carried out on the Holstein dairy cows positively estimated the studied premix ZP61-2S. The results show that giving it to the calves had a beneficial effect on the digestibility of dry matter, which was better in the animals of the experimental group by 2.1% than in the control and amounted to 75.2%. Nitrogen utilization by animals in both control and experimental groups were not reduced, and the balance was positive. Thus, the ZP61-2S premix in the compound feed for young cattle increases the average daily gain of animals by 6.85%.