Productive Longevity of Animals, Methods of Its Prediction and Extension

Bekenev, V.A.

doi:10.15389/agrobiology.2019.4.655eng

Cited by 5 publications

(7 citation statements)

References 41 publications

(47 reference statements)

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“…A decrease in the age of pubescence and physiological maturity of heifers, that is, early maturity, is the main factor that determines the duration of use. Heredity, along with paratypical factors, affects the reproductive system and its successful functioning, including the age of reproductive use of livestock [3][4]. The main task of dairy farming is to intensify the industry by accelerating the increase in the genetic potential of animals [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Influence of reproductive qualities on dairy productivity of cows of the Simmental breed

Grinchuk

Nesterova

2021

E3S Web Conf.

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The aim of work is to explore influence of first fruitful insemination, service period and dry period to dairy productivity of Simmental cows. The research is aimed at studying the milk production of Simmental cows with different levels of reproductive qualities. The result of the research, a relation was established between the age of the first fruitful insemination, the duration of the service period, the duration of the dry period and milk production performance. It has been established that the age of the first fruitful insemination at 18-24 months has the most beneficial effect on subsequent milk production. The service period of 90-120 days has a positive effect to an increase in milk yield per 305 days of lactation, the longer service period negatively affects to the mass fraction of fat. With an increase in the duration of the dry period, the mass fraction of fat increases, but milk yield decreases. The influence of reproductive qualities to the milk protein is negligible. It was revealed that the age of the first insemination at 18-24 months is the most profitable for production. According to the results of the research, it can be judged that reproductive qualities, in combination with other factors, affect the milk productivity of Simmental cows.

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Section: Introductionmentioning

confidence: 99%

Influence of reproductive qualities on dairy productivity of cows of the Simmental breed

Grinchuk

Nesterova

2021

E3S Web Conf.

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“…Previous studies have provided abundant evidence on different ways to increase the productive life of livestock by varied animal maintenance and breeding methods [4][5][6]. It has been established the impact of the first calving time, the milk yield for the first lactation, the calving season, linear affiliation, pedigree, servicing bulls and other factors on the lifespan [7,8]. The existing data are rather controversial that makes them difficult to use fruitfully in production [9].…”

Section: Introductionmentioning

confidence: 99%

The effect of holstein bulls’kappa-casein gene genotype on the productive longevity of their female offspring in the republic of Bashkortostan

et al. 2021

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Increased productivity in the industry can be achieved by breeding for productive longevity through searching and using genetic markers. The study analysed the data of 1476 animals with at least one completed lactation. Depending on the linear affiliation and kappa-casein gene genotype of servicing bulls, their female offspring were divided into 4 groups. The CSN3 A allele frequency in the studied bulls was 81.91%, the CSN3 B allele was 18.09%. The highest frequency of the desired CSN3 B allele in the servicing bulls-producers of the Reflection Sovering line was 20.83%, which is 3.69% more than in the bulls of the Vis Back Ideal line. The animal life length analysis showed that the female progeny of bulls from the Reflection Sovering line (2.46 lactation), especially those with the CSN3 AB genotype (2.59 lactation), had the longest life. The offspring of CSN3AB genotype bulls of the Reflection Sovering line had the highest lifetime milk yield (18490 kg). The CSN3AB genotype cows of the Reflection Sovering line had the highest average milk yield on the 1st day of a cow’s life of 9.05 kg.

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“…Снижение возраста достижения половой и физиологической зрелости организма телок, то есть скороспелость, является основным фактором, определяющим продолжительность продуктивного использования. Наследственность, наряду с паратипическими факторами, оказывает влияние на воспроизводительную систему и ее успешное функционирование, в том числе на возраст репродуктивного использования животных [3,4].…”

Section: Introductionunclassified

The Influence of Reproductive Qualities on Dairy Productivity of Cows of the Simmental Breed

Grinchuk¹,

Nesterova²

2021

Vestnik of Ulyanovsk SAA

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The applicability of the work is to identify the possibility of productivity increase of cows of the Simmental breed due to reproductive qualities. The aim of the work is to assess the influence of the first insemination age, service period and dry period on milk productivity of Simmental cows. The research is aimed at studying milk productivity of Simmental cows with different levels of reproductive qualities. The obtained data were statistically processed in Excel. Descriptive statistics methods were used. The object of the research were Simmental cows of “ Tasaliev D.M. “ farm of Kaliningrad region. As a result of the study, a relation was established between the age of the first successful insemination, the service period duration, the dry period duration and parameters of milk productivity. The age of the first successful insemination at 18-24 months has the most beneficial effect on subsequent milk productivity. A service period of 90-120 days has a positive effect on milk yield increase for 305 days of lactation, a longer service period negatively affects the mass fraction of milk fat. Prolonged service period results in a calf loss of 100 calves per year. With an increase of dry period duration, the mass fraction of milk fat increases, but milk yield decreases. The influence of reproductive qualities on mass fraction of milk protein is insignificant. According to the results of the studies, it can be considered that reproductive qualities, in combination with other factors, influence milk productivity of Simmental cows.

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Productive Longevity of Animals, Methods of Its Prediction and Extension

Cited by 5 publications

References 41 publications

Influence of reproductive qualities on dairy productivity of cows of the Simmental breed

Influence of reproductive qualities on dairy productivity of cows of the Simmental breed

The effect of holstein bulls’kappa-casein gene genotype on the productive longevity of their female offspring in the republic of Bashkortostan

The Influence of Reproductive Qualities on Dairy Productivity of Cows of the Simmental Breed

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