Optimization the postpartal period of cows using mineral feeding additives with calcium and phosphorus

The aim of the work is to evaluate the prophylactic effect of the chelated fodder additive „R164 HOHMIN T PLUS“ (CHP) for the period of the impact of cows after the cubs‘ birth, the time until the first estrus, productivity, the consist of milk, the changes of body temperature after the first ten days after calving, to determine the amount of calcium, phosphorus, alanine aminotransferase, total protein in blood serum after the 20th - 25th day of calving. The cows were divided into the control and research groups. There were 10 cows in both groups. The cows belonged to the Lithuanian Black and White breed in 2 - 6 lactation. We were observing the period to the first estrus, carried out 3 milkings on the 30th, 60th and 90th days after the calving and measured the amount of produced milk in kg. The amount of fat (in %), protein (%), lactose (%), urea (%), somatic sells (%) has been researched in milk samples. The shorter time 17,3 proc. (p0,05) . The enzyme of alanine aminotransferase of the cows‘ research group was 14% higher than of the cows‘ control group (p<0,05). The amount of calcium in blood serum of the cows‘ research group was 20% higher than of the cows‘ control group (p<0,05). Research product shortens the period up to estrus 17,3% p<0,05. The productivity of cows on the 30th day after calving has increased by 4,5% (p