The word yalovy comes from Old Slavic "yawls" that fruitless means. In modern zootechnical practice by the term "yalovy" designate such cows who did not become pregnant within 80-85 days after the previous otel. That is did not bring an issue within calendar year. The Yalovost - a concept the economic, meaning short-reception of calfs for the annual period and expressed as a percentage.
Reasons of a yalovost of cows
Cows have to return to normal sexual hunting in the first two months after an otel. If it does not occur, it is necessary to reveal and remove causes of infringement of reproduction function of cows.
There is a lot of reasons which can cause similar violations. They can be connected with diseases of genitals of animals. But most often they are in the wrong feeding and the maintenance of cattle.
Work of reproductive function of cows can be broken as because of a nedokarmlivaniye, and overfeeding. Nedokarmlivaniye and, arising in the investigation him, starvation cause reorganization of a metabolism. It is fraught with frustration of the nervous and endocrine systems regulating sexual function. Overfeeding quite often leads to obesity and regeneration of tissues of uterus and ovaries. Violations in work of reproductive function can also arise because of bad conditions of keeping of cows: dampness and low temperature indoors, excessive gas contamination of cowsheds, lack of walks at animal and some other reasons.
Prevention of a yalovost of cows
Attempts to warn a yalovost of animals by means of any one means or medicine did not yield desirable result yet. Therefore to achieve insemination of cows in optimum physiological terms, it is necessary to carry out the whole complex of actions. A priority — providing good conditions of keeping and full feeding during the period preceding an otel and right after it. Important not only to feed much a cow, but also to observe structure of a diet. So, the shortage of hay and root crops together with surplus of a silo and concentrates have an adverse effect on a condition of cows during this period. The excess quantity of proteins at the relative shortage of carbohydrates can lead to a metabolic disorder and cause infertility. Important also presence at a diet macro and minerals. To the first calcium, phosphorus, magnesium, concern the second — iron, copper, manganese, iodine and others. The shortage of these substances has also negative effect on reproductive function of cows. Also vitamins, in particular vitamins A have a great influence on function of reproduction, E and D.Nuzhno also in due time to carry out gynecologic survey of cows. By their results the veterinarians, in the preventive or medical purposes, can appoint various hormonal and performance-enhancing drugs. To the cows who underwent hormonal processing will organize active walks for 2-3 hours a day on distance 3-4 kilometers.