Assessment of the effect of inbreeding on the productive longevity of dairy cattle

Горелик, О. В.; Lihodeevskaya, O E; Zezin, N. N.; Sevostyanov, M. Ya.; Leshonok, O. I.

doi:10.1088/1755-1315/548/8/082009

Cited by 30 publications

(17 citation statements)

References 9 publications

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“…The calculation of the correlation coefficient between live weight and milk yield per lactation confirms the latter assumption (figure 4.). [25][26][27] it is considered that with an increase in live weight there is an increase in milk yield, in our case, there is a low negative relationship between these traits. Thus, an increase in live weight does not indicate an increase in productivity, although in absolute numbers this increase is noted up to and including 3 lactation.…”

Section: Fig 2 Indicators Of Productivity Of Cows By Lactationmentioning

confidence: 99%

“…As a result, large, highly productive animals having high genetic potential for productivity and well adapted to industrial milk production were obtained. They are able to show good average daily milk yields throughout lactation, produce for a long time without a sharp decrease in milk yield, but a decrease in reproductive ability was noted [22][23][24][25][26][27]. The study of the dynamics of live weight of cows with age and its relationship with milk productivity is relevant and has practical significance.…”

Section: Introductionmentioning

confidence: 99%

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Changes in the live weight of cows with age and its impact on their productive qualities

et al. 2021

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In the Sverdlovsk region, holstinized black-and-white cattle of the Ural type is bred, which is represented by large, highly productive animals with a high genetic potential for productivity. The purpose of the work is to study the dynamics of live weight of cows with age and its relationship with milk productivity. In animals, there is an increase in live weight with age by 22.6 kg (from 3 to 4 lactation) – 46.2 kg (from the first to the 2 lactation) or by 3.4 – 7.9%. With an increase in live weight, there was an increase in milk yields up to 3 lactation, and then their decrease. The greatest decrease was observed in the fifth lactation. The coefficient of milk production decreases with the age of cows and is accompanied by an increase in live weight. Despite an increase in live weight and a decrease in milk yield for every 100 kg of live weight of cows, all of them turned out to be of dairy-oriented productivity. However, it should be noted that achieving a live weight of 710 kg or more leads to a decrease in the efficiency of cow use. There is a low negative relationship between live weight and milk yield of cows.

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Section: Fig 2 Indicators Of Productivity Of Cows By Lactationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Changes in the live weight of cows with age and its impact on their productive qualities

et al. 2021

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“…Obtaining it in the conditions of the zone of man-made pollution impact imposes special requirements on manufacturers to ensure the safety of the product. The use of natural feed additives with ion-exchange and adsorbing properties makes it possible to obtain a safe product [19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Morphological and biochemical parameters of cow blood when using chitosan preparations

et al. 2021

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The study of the effect of chitosan succinate use on the hematological indicators of dairy cows is relevant. It has been established that there was a clear tendency to increase in the number of white blood cells by 10.12% in animals of group 3 (P < 0.1) on the 10th day of the experiment in cows receiving low-molecular-weight chitosan succinate, in the second group the increase in this indicator by 2.94% was unreliable. On the 20th day of the experiment, an intensive increase in the number of white blood cells was observed in animals of both experimental groups by 14.63–17.38% (P≤0.01), respectively, for the experimental groups of cows. On the 10th day on the background of the use of low-molecular-weight chitosan (group 3), a significant decrease in the number of red blood cells was found, compared with the background, by 8.34% (P≤0.05). On the 20th day, the decrease in the number of red blood cells was already significant in both experimental groups, and their level was 6.09±0.33...6.38±0.20·109/l (P≤0.05), respectively. On the 60th day of the study, this trend was maintained only in group 3, and the concentration of red blood cells was lower by 12.64 (P < 0.05) compared to the initial values. By the 60th day, there was an increase in the level of hemoglobin index up to 126.12±9.10 g/l.

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“…As a result, large, highly productive animals with a high genetic potential for productivity and well adapted to industrial milk production were obtained. They are able to have good average daily milk yield during the entire lactation, produce milk for a long time without a sharp decrease in milk yield; however, a decrease in reproductive capacity is noted, which put the issues of herd reproduction and rearing young stock into the first place [22][23][24][25][26][27][28]. The study of the dynamics of the live weight of replacement heifers from different seed bulls and its conjugation by periods and with the age of the first insemination is relevant and has practical value.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the growth of replacement heifers from different seed bulls

et al. 2021

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In the Sverdlovsk region Holsteinized Black Pied cattle of the Ural type are bred which are represented by large, highly productive animals with a high genetic potential for productivity. Great importance is attached to the rearing replacement calves. The aim of the study was to study the dynamics of the live weight of replacement heifers from different seed bulls during rearing and its dependency on the age of the first insemination. The highest average daily weight gains were in the dairy period of heifers development, they ranged from 989 g for the daughters of the bull Thunderline to 1054 g for their peers from the bull Maximum. There were also high average daily gains during this period when rearing heifers from the bull Renigend. In the second period of rearing from 6 to 10 months of age there was a decrease in the average daily weight gain in all groups. Heifers from different seed bulls reach the required live weight for the first insemination at different ages. Maximum’s daughters, which had the weight of 399.4 kg at the age of 12.9 months. reached the required live weight most quickly. Their peers from other seed bulls reached the aforementioned live weight only at the age of 13.7 months.

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Assessment of the effect of inbreeding on the productive longevity of dairy cattle

Cited by 30 publications

References 9 publications

Changes in the live weight of cows with age and its impact on their productive qualities

Changes in the live weight of cows with age and its impact on their productive qualities

Morphological and biochemical parameters of cow blood when using chitosan preparations

Evaluating the growth of replacement heifers from different seed bulls

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