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The investigations were carried out on 414 cows from one farm. The cows were evaluated twice before the end of lactation by clinical examination of udders and laboratory examination of milk samples. Antibiotic solutions (197 cows) or DC preparations (177 cows) were infused into all quarters after last milking. Groups of cows were treated with antibioties in combination with chlormethine or levamisol. It was found that after calving in control group (40 cows) there were more cows with infected quarters than before drying off. The results of treatment varied. Combinations of procainic penicillin (600 000 im) with streptomycine (0,5 g) gave better results than these antibiotics at 50% lower doses. Treatment with DC and Ilcocillin DC was more effective than the use of antibiotic solutions. Therapeutic and prophylactic effectiveness of antibiotics in dry cows increased after their supplementation with chlormethine.
The studies aimed to evaluate the influence of differentiated dried cows feeding on their health and futher milk yield, and on health of their offspring. The experiment was carried out on 37 cows of Black and White breed randomly divided into 5 feeding groups, in which were applied diets of restricted amounts of grass silage and potato pulp and straw ad libitum. The diets were completed with small amounts of concentrate or dried forage. Crude total protein in dry matter of diet, except of the second group-II (14,3%) did not ecceed 11,8%. As a result of the carried out studies there was stated thet aconomical feeding dried cows of milk production to 25 kg of milk daily after calving, did not influence negativaly cows and calves health and calves body weights at births and their futher development. Protein, glucose and macro- and microelements contents in blood serum are contained in limits of physiological norms. However levels of beta carotene and vitamin A were found in blood serum of cows and calves, colostrum and milk. The studies should be continued on cows of milk daily yield above 25 kg.
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