Assessment of the factors influencing the fertility of dairy cows

Abstract

The assessment of factors of reproductive dysfunction of dairy black and white cows of second-third lactation breed weighing 450-500 kg was made in one of the breeding farms of the Perm region. The conditions of keeping animals did not meet the zoo-hygienic standards. For lactating cows a concentrate type of feeding was used. In the structure roughage feed mixture occupied 15% is juicy 25.1 %, concentrated – 59.2 %. The digestible protein content in 1 ECU was 123 g, the sugar-protein ratio was 0.4: 1, the ratio of calcium and phosphorus was 1.2:1, the fiber content of dry matter – 19 %. The preclinical stage of development of postpartum inflammatory processes in the uterus of some animals was noted; the development of clinical metritis of other animals was noted. The decrease in the amount of glucose, reserve alkalinity, carotene, magnesium and a simultaneous increase in the content of ketone bodies was typical of blood of cows with clinical signs of diseases of the uterus as compared with those animals in the premorbital state of reproductive pathology.