Influence of paratypical factors on productive qualities of Holstein cows

Tarchokov, Timur T.; Aisanov, Z. M.; Sukhanova, S.F.; Tleinsheva, Madina G.; Mishhozhev, A. A.; Balpanov, D. S.

doi:10.1088/1755-1315/341/1/012047

Cited by 4 publications

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“…For the experimental group, in addition to the main ration, the concentrates included crushed bentonite, with a particle diameter of 4-6 mm, daily in an amount of 1% (137 g/animal), based on the dry weight of the feed. The specified amount of fed bentonite was established during a reconnaissance experiment in the same farm, in which out of three different tested levels of feeding dairy cows, the optimal dose was recognized as 1% of the dry mass of feed, at which the milk productivity of cows and the qualitative and technological characteristics of milk significantly increased [2,11].…”

Section: Methodsmentioning

confidence: 99%

Biotechnological aspects of transformation of heavy metal salts and their detoxication in milk of milk cows

et al. 2021

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Based on the results of previous studies on pigs and poultry, in which encouraging results of a significant decrease in the concentration of heavy metals in the body were obtained, respectively, in pork, poultry and eggs, the study provided for the use of the bentonite clay of the Zamankul deposit (RNO-Alania) as an enterosorbent in relation to heavy metals and detoxification of the organism of dairy cows. In order to study the feasibility of using bentonite as an enterosorbent, studies were performed on dairy cows of the Simmental breed in the Kaloyev farm located in st. Zmeyskaya, Kirovsky district of North Ossetia-Alania. To conduct research on the principle of analog pairs, two experimental groups of cows (control and experimental, five cows in each group) of the 3rd and 4th lactation were formed. The experiment lasted for 305 days of lactation from March 2018 to January 2019. Herewith, the control group of cows was fed with a basic diet balanced in all nutritional elements, the experimental livestock, together with the main diet, daily in the composition of the concentrates was injected with crushed bentonite with a particle diameter of 4-6 mm based on the dry matter of the feed (137 g/animal). The study of the concentration of heavy metals (cadmium, lead and zinc) in soil, feed, blood and milk was performed in two periods of lactation (on the 250th and 300th days of lactation). Herewith, an increased content of heavy metals in the soil was established, relative to the MPL: cadmium - 10.1; lead - 7.4; zinc - 9.7 times more, in drinking water: cadmium - 2.5 times; lead - 9.0 times and zinc - 9.7 times more, in feed: cadmium - from 1.7 to 5.3 times; lead - from 1.1 to 1.7; zinc - from 1.0 to 2.5 times the MPL. The inclusion of bentonite to the ration of the animals of the experimental group, in comparison with the control group, in both study periods (250 and 300 days of lactation) contributed to a significant decrease in the concentration of the studied heavy metals in the blood from 17 to 20%, in milk - from 16 to 18 %. The transformation ration values of heavy metals from feed into the body, respectively, into milk, were also lower in the animals of the experimental group, relative to the control.

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Section: Methodsmentioning

confidence: 99%

Biotechnological aspects of transformation of heavy metal salts and their detoxication in milk of milk cows

et al. 2021

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The use of gene technologies in the genomic-index assessment of producers of Canadian breeding

Bukarov¹,

Zakharov²,

Hashegulgov

et al. 2021

E3S Web Conf.

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The article provides an assessment of the use of gene technologies in the genomic-index assessment of producers in the conditions of farms in the Moscow region, which allows to provide dairy farming with high-quality breeding material. Genomic index assessment accelerates the breeding goal achievement process. It contributed to an increase in the productivity of cattle, an increase in the profitability of cattle breeding, which allows to reduce the time for creating breeding herds of dairy cattle by 2 times. Of the 15 bulls, 10 (67%) were evaluated by the A1-A3 breeding categories. Two bulls were categorized as neutral. The bull Ecuador received the A2B1 breeding categories. The daughters of this bull are fat and milk enhancers, which is 4.46%, with a milk yield of 12432 kg of milk.

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Immunogenetic status and breeding value of Holstein cows

et al. 2021

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In the genealogical structure of the breeding stock, the highest specific weight is occupied by the Reflection Sovering and Vis bek Aydiala lines, accounting for 56.8 and 39.9% of animals, respectively. The study results of Holstein cattle blood-group factors can be used to monitor its gene pool, genetic intrabreed differentiation, assess selection parameters, and conduct targeted selection of parental pairs. It was determined that in EAA blood group system in Holstein cows of reproduction from the USA, the frequency of A1 antigen is 58.7%, and in domestic reproduction animals, this antigen is found with a lower frequency of 50.7%. At the same time, in the specified system of blood groups in both groups of experimental animals, antigen “a” is characterized by the highest frequency, the lowest occurrence is A2 antigen, and animals with A1 antigen took an intermediate position. In EAB system, the US Holstein cows have a higher frequency of such antigens as Е3/, О3 и I1 compared to the reproductive animals of Agro-Soyuz LLC. The EAF blood group system is represented by two antigens, where F antigen frequency in both groups of experimental animals is 100%. Of all the blood group systems, the greatest differences between compared groups of animals were detected for the antigens of EAZ blood group system.

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Influence of paratypical factors on productive qualities of Holstein cows

Cited by 4 publications

References 1 publication

Biotechnological aspects of transformation of heavy metal salts and their detoxication in milk of milk cows

Biotechnological aspects of transformation of heavy metal salts and their detoxication in milk of milk cows

The use of gene technologies in the genomic-index assessment of producers of Canadian breeding

Immunogenetic status and breeding value of Holstein cows

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