[The effect of nutrition and technology on fertility in cows and the health of calves].

The fertility of cows and health of calves are influenced by a number of factors, including the technological systems and quality of nutrition. The effect of nutrition was studied in two selected herds with different technological systems during 1986 to 1987. The feed rations were found to be non-standard, the nutrient ratios were not balanced, and the animals suffered from different stages of metabolic disorders. These disorders were worse in the H. large-capacity barn, equipped with modern technology, in comparison with the S. barn with traditional technology. The better reproduction data recorded in the S. barn, using the traditional technology, are ascribed to better organization of work, better feeding, and better care of the animals. The production of viable calves is the most vulnerable point in the reproduction process. Great reserves were found to exist in both the herds studied. The shortcomings suggest that knowledge of the factors and the causes of losses during the year seasons is a prerequisite for tracing the aetiology and taking effective measures, which in turn will influence the weaning. If fertility is to remain high, fertility disorders must be treated in time. As the analyses show, uterus diseases are diagnosed most frequently under farm conditions; their occurrence is associated with the hygiene of parturition and generally with hygiene in the barn. The set of recommendations to improve the reproduction process in the two herds influenced the economy of the farms.