Agrarian Science and Food Technologies

SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 3(106)

Published: 2019.08.29

DOI: XX.XXXXX/XXXXXXXXXXXXX

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У збірнику висвітлено питання підвищення продуктивності виробництва продукції сільського і рибного господарства, технології виробництва і переробки продукції тваринництва, харчових технологій та інженерії, водних біоресурсів і аквакультури.

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INFLUENCE OF CALVING PERIOD ON THE CHARACTER OF LACTATION CURVE IN THE COWS OF DAIRY BREEDS

DOI: XX.XXXXX/XXXXXXXXXXXXX

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Polishchuk T.V., Сandidate of Аgricultural Science, Associate Professor

Vinnitsia State Agrarian University

Annotation

The research has found that the cows of Holstein breed probably (P<0.001) prevailed the

cows of Ukrainian black-speckled dairy breed in the milk yields per lactation by 23.0%, in the

indicator of milk fat content – by 22.8%, in the protein content – by 0.3 % and in the milk protein

content – by 13.7%.

It has established that the indicators of milk productivity in the cows of Ukrainian black

speckled dairy breed, in comparison with those of Holstein breed, are characterized by a higher

degree of phenotypic variability.

The cows of Holstein breed, having calving in winter and autumn, were characterized by the

highest milk yields. This indicator was by 5.4% and 9.7% higher compared to the animals having

had calving in spring, while it was by 9.4% and 13.6% higher in those, which had calving in

summer. The coefficient of lactation constancy by I. Iohansen and A. Hanson was probably by 5.2%

(P<0.01) lower in the cows having had calving in spring compared with those, who had calving in

winter, while it was by 3.0% (P<0.05) lower in the cows having had calving in summer. The

autumn calving probably exceeded the winter one by 2.2% (P <0.05) in the indicator of milk yield

decline to 7 months.

The milk yield in the cows of Ukrainian black-speckled dairy breed, having had calving in

winter, was by 4.7% higher than this indicator in the animals, which had calving in spring, while it

was by 6.1% higher in the animals having had calving in summer, and by 1.1% higher in those,

which had calving in autumn. The coefficient of lactation constancy by I. Iohansen and A. Hanson

was probably by 9.1% (P>0.05) higher in the cows of summer calving, compared with that

indicator of winter calving. The indicator of milk yield decline to 7 months was by 2.7 % (P<0.01)

higher, respectively.

The lactation is the most permanent in the cows of Holstein and Ukrainian black-speckled

dairy breeds, which had calving in autumn and winter, because the higher the indicators are, the

more stable the lactation curve of experimental cows is.

The study of lactation curves of Holstein breed cows in different calving periods shows that

the maximum productivity was observed in the animals of all groups during the second month of

lactation, and then the lactation curve was declining with different intensity. The cows of winter

calving had the highest monthly yields, which later gradually decreased every month with a sharp

drop after the sixth month of lactation. The lactation curve of yields in the cows of Ukrainian black

speckled dairy breed was characterized by a sharp increase to the peak of lactation with a sharp

decline to certain months and a further gradual decrease until its end.

According to the course of lactation the cows of Holstein breed can be regarded as those

having a high and stable productivity and a rhythmical course of lactation. The cows of Ukrainian

black-speckled dairy breed are regarded as those showing a high productivity immediately after

calving, which declines sharply afterwards. The lactation curve quickly goes down after a short

term going upward.

Considering the calculation of the economic efficiency of calving period in the cows of

Holstein and Ukrainian black-speckled dairy breeds, it is proposed to plan the calving of cows in

winter and autumn.

Keywords: lactation curve, calving season, cows, milk productivity, hopes, economic efficiency, profit

List of references

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production of Ukraine. 2009. № 3. P. 6-8.

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lactation. Livestock production of Ukraine. 2009. № 6. P. 13-14.

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technology. 2015. Issue 1. P. 141-152.

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5. Kovalenko V., Hyl M. Lactation curves in the cows with different intensity of body

formation. Livestock production of Ukraine. 2014. № 1(53). P. 18-21.

6. Kovalchuk T.I. Economically useful and biological characteristics of cows of different

genotypes of newly created intensive dairy breeds: Abstract of Dissertation for the Degree

of Candidate of Agricultural Sciences. Lviv, 2008. 24 p.

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guide for livestock specialists]. Mykolaiv: Kolos [in Ukrainian].

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characteristics of dairy cows. Scientific bulletin «Askania-Nova» of Institute of Animal

Husbandry of the Steppe Areas named after M.F. Ivanov «Askania-Nova» - National

Scientific Selection and Genetic Centre for Sheep breeding. 2009. Issue 2. P. 89-97.

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2006. №2 (10). P. 7-10.

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About journal

Topics of the journal:

Аnimal feeding and feed technology; current problems of animal breeding, breeding and hygiene; food safety and food processing technology; aquatic bioresources and aquaculture

Keywords: харчові технології

Key information:

ISSN (print): 2616-728X

DOI: -------

Certificate of state registration of the print media: КВ № 21523-11423Р 18.08.2015

Founder of the collection: Vinnytsia National Agrarian University, Georgia Academy of Agricultural Sciences

Editor-in-Chief: Viktor Mazur, Candidate of Agricultural Sciences Associate Professor, VNAU (Vinnytsia)

Deputy editors-in-chief: Aleksidze G.M., D.Sc.(Ph.D.), academician of the Academy of agricultural sciences of Georgia; Yaremchuk O.S., D.Sc.(Ph.D.) Professor, University of Vinnitsa (Vinnytsia)

Secretary in charge: L. Kazmiruk

Editorial Board full list

Editorial board

Mazur Viktor, Candidate of Science, Associate Professor of VNAU (Editor-in-Chief);

Guram Aleksidze, Ph.D., Academician of the Academy of Agricultural Sciences Georgia (Deputy Editor-in-Chief);

Yaremchuk Oleksandr, Ph.D., Professor, VNAU (Deputy Editor-in-Chief);

Members of the Editorial Board:

Ibatullin Ildus, Ph.D., Professor, Academician, NULES;

Kaletnik Hryhoriy Ph.D. (Economics), Academician of NAAS of Ukraine, VNAU;

Zakharenko Mykola Oleksandrovych, Ph.D., Professor, NULES;

Vashakidze Archil, Ph.D., Academician, National Coordinator for Agricultural Electrification and Automation (Georgia);

Giorgadze Anatoly, Ph.D. (Engineering), Academy of Agricultural Sciences of Georgia;

Grib Josip, Ph.D, Professor of NUHPP;

Dzhaparidze Givi, Ph.D. (Economics), Academician, Vice-President of the Academy of Agricultural Sciences science of Georgia;

Georgiy Yeresko, Ph.D. (Engineering), Professor, Corresponding Member of NAAS of Ukraine, Institute of Food Resources;

Vlasenko Volodymyr, Ph.D.(Engineering), Professor of VTEI;

Kulyk Mykhaylo, Ph.D., Professor, Corresponding Member of NAAS of Ukraine, VNAU;

Kucheriaviy Vitaliy, Ph.D.(Engineering), Professor, VNAU;

Lysenko Alexander, Ph.D., Professor, Research Institute of Experimental Veterinary Science, Academy of Sciences of Belarus (Minsk);

Lyotka Halyna, Ph.D., Associate Professor of VNAU;

Mazurenko Mykola, Ph.D., (Engineering), Professor;

Polishchuk Galina, Ph.D., Associate Professor;

Sychevsky Mykola, Ph.D.(Economics), Professor, Corresponding Member of the National Academy of Sciences of Ukraine, Institute of Food Resources;

Skoromna Oksana, Ph.D., Associate Professor;

Chagelishvili Revaz, Ph.D., Academician, National Forestry Coordinator (Georgia);

Chudak Roman, Ph.D., (Engineering), Professor, VNAU;

Sheiko Ivan, Doctor of Science, Professor, Institute of Animal Science of the Academy of Sciences of Belarus (Zhodino);

Kazmyruk Larisa, Ph.D., Associate Professor of VNAU (secretary in charge).

Edition: Collection

Type of publication for the intended purpose: scientific

Edition status: shared

Year of foundation: 2015

Frequency: 1 to 5 times a year

Volume: 4 to 10 ppm (format A-4)

Edition language: (different languages) Ukrainian, Georgian, English, Russian

Scope and category of readers: nationwide, foreign researchers, university professors, graduate students, students and professionals of agriculture and fisheries and food production

Article publishing is a paid service. Cost for printing in professional publications in accordance with the Decree of the Cabinet of Ministers of Ukraine of August 27, 2010 No. 796 "On approval of the list of paid services that can be provided by state educational institutions, other institutions of educational system belonging to state and communal ownership" and the Rector Order of the Higher Education University Mazur V.A. dated March 14, 2018 No. 93 “On setting the cost of printing in professional editions of the University”.

The cost of printing one page in professional editions of the university is 60 UAH.

Beneficiary: Vinnytsia National Agrarian University MFO 820172 Current account No. 31256282102055 code 00497236 Bank State Treasury Service of Ukraine, Kyiv. VAT payer code 004972302286. Registration number 100271744. Purpose of payment: for printing an article in the collection: "Agrarian science and food technology".

History of journal:

Agrarian Science and Food Technology Established in 1994 under the name of the Collection of Scientific Works of VSAU.

According to the Resolution of the Presidium of the Higher Attestation Commission of Ukraine of September 11, 1997, this publication has acquired the status of a professional, in which it is allowed to publish the main results of the dissertation research in the fields of "Agronomy", "Animal engineering" and "Economic Sciences".

In 2001-2014 it was published under the title "Collection of scientific works of Vinnytsia National Agrarian University".

Since 2015 it is:"Agricultural Science and Food Technologies".

Listed in the updated list of scientific professional editions of Ukraine in agricultural sciences under the name "Agrarian Science and Food Technologies" (ground: Order of the Ministry of Education and Science of Ukraine of May 16, 2016 No. 515).