Сельскохозяйственные и ветеринарные науки

Meat productivity of crossbred cattle improved by Red Steppe and Black-motley breeds

The article describes the results of studying crossbred cattle. Under equal keeping conditions and moderate feeding the sons of the Red Steppe mothers and the Red Danish and Holstein fathers (groups I and III) used 7-19% less feed units and 6-15% less protein per 1 kg of weight gain than crossbred bull calves of the Red Steppe and Angler, Black-motley and Holstein breeds (groups II and IV). No regularity was found in the consumption of feed per 1 kg of weight gain between the sons of breed improvers of different categories and interbreed hybrids.

Morphobiochemical indices of blood of young geese who consumed vitamin supplement

The purpose of the work was to study the effect of Vitamin feed supplement on the hematological indicators of young geese. The research was carried out on young geese - hybrids of Shadrin and Italian white breed on the farm “Popov S.N.” in Shumikhinsky district, Kurgan region. The young birds at a daily age were divided into 3 groups. 500 heads were selected for each group. The poultry cultivation period was 60 days.

Quality of feed species from eastern galega (Galega orientalis Lam.)

The experiments studied the influence of the vegetation phase of eastern galega (Galega orientalis Lam.) plants in the conditions of the North-Western region of Russia on the characteristics of the nutritional properties of the feed prepared from it. It was established that eastern galega should be harvested in the North-Western region for grass flour and pellets in the stalk phase.

Rating assessment of breeding bulls of the Kholmogorskaya breed in terms of reproductive indicators in foreign and domestic breeding

The article presents the results of rating assessment of breeding bulls of the Kholmogorskaya breed in terms of reproductive indicators in foreign and domestic breeding in the North-West zone of the Russian Federation. The studies were conducted on the basis of a rating developed in the Northwest Research Institute of Dairy and Grassland Economy. 765 daughters of 18 domestic breeding bulls and 14 of foreign breeding bulls were observed. The rating of breeding bulls is established on reproductive signs of daughters.

Scientific and practical recommendations for obtaining innovative feed based on a three-component poly-species mixture of annual forage crops

Long-term studies (2000-2020) showed that the introduction of vetchoats grain silo mixture in the diet of dairy cows contributed to an increase in milk productivity by 6.1 %, while reducing the cost of exchange energy for the formation of 1 kg of milk by 1.7 %. The aim of the research was to obtain an innovative feed for dairy cows based on the use of a variety mixture of annual forage crops, from which grain silo mixture can be produced.

Comparative evaluation of the influence of vaccinal stress on a number of physiological indicators, productivity and quality indicators of cows

The article presents the results of studies devoted to the influence of vaccination stress (stress related to the category of experimental stresses) on physiological indicators in terms of general clinical and biochemical blood analysis, productivity indicator and quality milk indicators of second lactation cows and first-calf cows.

Key Blood Enzymes as a Sign of Dairy Cattle Selective Breeding

The effectiveness of interior-complementary selection of cows by the level of serum enzymes has been revealed. In contrast to traditional selection, the more criteria are taken into account during selection, the more effective it is. When selecting first-calf heifers for one of the enzymes, the difference in milk yield is up to 446 kg of milk, with the total selection for the concentration of serum enzymes, it consistently increases to 656, 1059 and 1228 kg of milk. The same pattern is also characteristic when comparing hereditarily similar animals.

The comparative characteristic of the milk quality indicators at the breeding farms of the Totemskiy district in the Vologda region (taking into account the seasonality)

The article presents the results of studies devoted to the milk quality indicators: mass fat fraction, mass protein fraction, mass fraction of solids non fat, somatic cells in modern breeding farms of the Totem district in the Vologda region. In 2019 the quality milk indicators were determined from cows in the “Rodina” SPK (collective farm), the “Totemskiy” SPK and the “Velikodvorye”collective farm. Based on the data obtained the research was formed, the comparative characteristic of the milk quality indicators was carried out taking into account the season of the year.

Characteristics of Superior Breeding Material on the Basis of the Promising Breeding Families Study

Families represent the highest form of breeding work in dairy cattle breeding, which requires a deep study of breeding records of animals up to 10 generations or more, taking into account the genealogical affiliation. Therefore, the article has theoretical and practical significance in breeding programme. As a result of the long breeding work of specialists of OOO (LLC) “Zazerkal`e” of Gryazovets District in the Vologda Region, a highly productive herd of black-and-white breed has been created.

Productivity of variegated alfalfa after being treated with growth regulators in the Vologda region

Variegated alfalfa is a forage crop that occupies a leading place among perennial forage crops due to its multicut capacity, high yield of green mass and the nutritional value of the resulted feeds. The article presents the results of plant treatment with Biosil, Al’fastim and Emistim growth regulators. The effect of these preparations on the growth processes of variegated alfalfa and the increase of the green mass yield has been proved from theoretical and practical point of view.


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