PSIX-12 - “Lamarin Saldonum” for the raising of milk production of cows

The aim of the research was to establish the effectiveness of the use of the feed additive “Lamarin Saldonum.” The feed additive contains japanese kelp, milk thistle, to increase the milk productivity during the milking period. The studies were conducted on 40 cows of the black-and-white Holstein breed at the age of 2-4 lactation and the amount of milk for the last lactation not less than 7,500 kg. The cows were divided into 4 groups (GE1, GE2, GE3, GC) of 10 heads in each. Cows GE1, GE2, GE3 received 30 days before calving daily feed additive in doses of 0.1, 0.2, 0.3 g/kg, respectively, for 60 days. In the GC animals didn't receive the feed additive (control group). Control milking was performed every 10 days. Using of feed additive in the ration increased milk productivity. In the 1st month of lactation, the average daily amount of milk in GC was 24.00±0.93 kg, which is 7.4%, 19.6% (P < 0.01), 7.4% less than in GE1, GE2 and GE3, respectively. In the 2nd month, the highest average daily amount of milk in GE2 and GE3, which is 13.4% (P < 0.01) and 4.6% more than the GC, respectively. In the 3rd month, the average daily amount of milk in GE1, GE2, and GE3 was 30.22±2.44 kg, 39.57±2.68 kg, 35.11±2.59 kg, respectively, which is 6.8%, 39.9% (P < 0.01), 24.1% more than in GC. The mass fraction of fat in milk in animals GE1, GE2, GE3 was 0.2-0.92%(P < 0.01) higher than in GC. In the second month of lactation, the mass fraction of protein in GE2 was higher by 0.24% (P < 0.01), in GE3–by 0.14 (P < 0.05) relative to GC. At the 3rd month of lactation, the protein content in milk was 0.29% higher in GE2 (P < 0.001) and GE3-by 0.21% (P < 0.001) than in GC.