Efficiency of white lupin grain in composition of feed for dairy cattle

Experimental data are presented on the use of feed concentrates containing different levels of white grain of the RSAU-MTAA breeding (grade Degas) in feeding of highly productive lactating cows.In the process of physiological experiences were studied: amino acid composition of grain, milk production, nitrogen balance and digestibility of nutrients of lactating cow diets.The article presents results of the study of milk productivity and nitrogen balance with the use of white lupine grain in the composition of feed for highly productive cows in the amount of 18 %, 24 % and 30 % of the total nutritional content of the concentrate portion of the diet.Lupin was introduced instead of other expensive traditional protein feeds: rapeseed cake, sunflower meal with crude fiber and crude protein content of 19 % and 34 %, respectively, while maintaining the overall energy and protein nutritional value of the feed.It was found that the content of essential amino acids in lupine grain was higher by 4.34 % compared to other varieties of white lupine grown in Russia, and it is not inferior to other more common high-protein feed (soybean, soybean meal, sunflower meal, etc.).The inclusion of 24 % of white lupine grain in the feed resulted in significant increase in the average daily milk yield of natural fat content by 6.0 % and protein content in milk by 7.07 % compared to the control group.The introduction of white lupine concentrate into the compound feed did not have a negative impact on milk productivity and nitrogen balance.All animals had a positive nitrogen balance.The greatest nitrogen of the diet was absorbed by cows receiving 24 % of the grain of white lupine in feed, both from accepted and digested and amounted to 30.5 % and 41.5 %, respectively.