milk yield

Assessment of the current state of the dairy cattle industry in the North-Western Federal District and the Vologda Region

Dynamic changes in the dairy cattle industry in the North-Western Federal District and the Vologda Region require their monitoring and studying to determine promising development trends.

Selection and genetic parameters of productive traits and exterior features of black-and-white cattle in Western Siberia

The article presents materials on the selection and genetic indicators of black-and-white cattle. The amount of repeatability allows for selection by productive qualities already in the first lactation. There was a significant negative moderate relationship between the mass fraction of fat and milk yield for 305 days of lactation (- 0.308; Р>0,999). There is a tendency of negative weak dependence between the milk yield and the mass fraction of protein, namely, the increase in milk yield is accompanied by a slight decrease in protein content.

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.

Technological aspects of increasing the productive longevity of dairy herds

The research has been carried out to establish the duration of productive use of breeding stock in the breeding farms of the Omsk region. As far as the productive use duration, the cows kept in free stall housing are found to have a significant advantage compared to the tied cows, the difference being 177 days or 17.2 %. A negative correlation has been established between the abundance of milk and the duration of productive use of cows in tied herds.


Dynamics of dairy cattle breeding development in the European North of the Russian Federation

 The article presents the research results on the quantitative and

qualitative characteristics of dairy cattle populations and breeding farms in the European

North of the Russian Federation. Nowadays, taking into account the current political and

economic situation of the livestock sector management, the problem of preserving the

number of dairy cattle breeds and increasing cow’s milk productivity is quite pressing.

     In the European North of the Russian Federation, there has been found the

Changes in Milk Productivity Using the Feed Concentrate “Urga” in the Diet of Highly Productive Cows

The results of research in milk productivity of lactating cows using the feed concentrate “Urga”, products of the EM series (LLC “EM-cooperation”) were analyzed. The received the feed concentrate “Urga” animals had higher monthly milk yield, the amount of milk produced in terms of base fat and protein, higher level of realization of productive capacity, which pointes out the feasibility in developing a feeding program and increasing the efficiency of milk production.

Effect of different milk production technology on milk yield of cows and somatic cell maintenance

The article provides the information on the results of the study of quantitative and qualitative indicators of milk and somatic cells based on the method of keeping and cows’ milking technology. The influence of the technology of the milk yield on the somatic cells maintenance is established.

Ethological individuality as a sign of ayrshire cattle breeding

Studies having been carried out on animals of Ayrshire breed show that indexes of food, motion and total activity selection can be successfully used as selection signs. Selection of cows on ethological individuality is accompanied by an increase of their milk production. Animals with increased food activity, compared to cows with a low one, have got the rise of milk yield per lactation by 686 kg. Ultra-active cows should be mentioned particularly, productivity of them opposite to infrapassive ones increases by 49%.

Influence of field beans «protected» protein on indicators of dairy cows productivity

The article presents the results of studies how field beans subjected to the microwave and chemical treatment influence the productivity of cows and the composition of milk. It has been found that the using in the cows diet of treated corn field beans in an amount of 1,5 kg per head of livestock increases the average milk yield with 4% fat by 5,3-11,1% and the absolute milk protein yield by 2,9-8, 2%.

The results of crossbreeding black-and-white cattle and the Holstein breed in the Vologda region

The article presents the results of crossbreeding black-and-white cattle breed and the Holstein one: population and level of milk production change in holsteinized cattle. It has been found that increasing consanguinity of Holstein breed affects milk yield raising. Moreover, the fat and protein content in milk of different cows genotypes varies slightly. It has been proven that the crossbreeding of black-and-white cattle with the Holstein breed is effective.

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