Influence of feed sorbents on the productive and reproductive traits of cows of Black-and-White breed

Abstract

In the composition of feed for cattle, the presence of toxins that are formed as a result of violations of the technology of harvesting and storage of feed is recorded. Aflatoxins, ochratoxins, zearalenone, T-2 toxin, DON (deoxynivalenol), fumonisin are isolated. Mycotoxins entering the blood have a rather negative effect on the body of cows, reducing their productivity and fertilizing ability. Under conditions of intensive milk production technology, the determination of toxins in feed when feeding highly productive cows is of particular importance. The purpose of the research was to establish the degree of influence of different dosages of feed sorbents on the productive and reproductive traits of cows. The research was carried out under the conditions of the breeding farm of Black-and-White breed in OOO “Barmino” in the Nizhny Novgorod region. The objects of research were cows of the first lactation of Black-and-White breed, and the subject of research was the dairy productivity of cows and their reproductive traits. The objectives of the research included a comparative study of the influence of feed additives “Provitol” and “Vetosporin-active” on the productivity and reproductive traits of cows. In the concentrate part of the feed, the excess of the permissible norm of the mycotoxins zearalenone by 2,5 times and ochratoxin by 4,2 times was revealed. It was found that the dairy productivity of cows and higher indicators of reproductive abilities were animals in the 4th experimental group, who have been received the largest amount of the feed sorbent “Vetosporin-active” 2 kg per ton of concentrated feed. In comparison with the analogues of other experimental groups, they have the best ease of calving, the absence of problems with the separation of the afterbirth and endometriosis, the optimal duration of the open days period and the minimum expenditures of sperm doses for effective insemination. It was recommended to use the feed sorbent “Vetosporin-active” at the dose of 2,0 kg per ton of feed as a feed additive in the main ration of highly productive cows to improve their reproductive and productive traits.