EFFECTIVENESS EVALUATION OF RAPESEED CAKE ON MILK PRODUCTIVITY OF COWS IN THE FIRST PHASE OF LACTATION

Aleksandr Lazarevich; Tamara Lefler; Alexander Kolomeytsev; Lyubov' Efimova

doi:10.36718/1819-4036-2026-8-163-176

VAK Russia 4 UDC 636.084 VAK Russia 4.1.1 VAK Russia 4.1.2 VAK Russia 4.1.3 VAK Russia 4.1.4 VAK Russia 4.1.5 VAK Russia 4.2.1 VAK Russia 4.2.2 VAK Russia 4.2.3 VAK Russia 4.2.4 VAK Russia 4.2.5 VAK Russia 4.3.3 VAK Russia 4.3.5 UDC 636.085 UDC 636.086.1

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EFFECTIVENESS EVALUATION OF RAPESEED CAKE ON MILK PRODUCTIVITY OF COWS IN THE FIRST PHASE OF LACTATION

Published in Bulletin of KSAU · Issue 8, 2026 · Pages 163–176 · Rubric: Animal breeding and veterinary surgery

DOI: https://doi.org/10.36718/1819-4036-2026-8-163-176 · EDN: BEZAZY

Received: 20.05.2025 Accepted: 14.09.2026 Published: 25.09.2026

Authors

Aleksandr Lazarevich

Tamara Lefler

Alexander Kolomeytsev

ORCID

Lyubov' Efimova

Aleksandr Lazarevich

Academic degree: candidate of agricultural sciences

Military Educational and Scientific Centre of the Air Force «Professor N.E. Zhukovsky and Y.A. Gagarin Air Force Academy» veduschiy specialist otdela organizacii i soprovozhdeniya nauchnyh issledovaniy · FGBOU VO Krasnoyarskiy GAU · Russian Federation

Tamara Lefler

Academic degree: doctor of agricultural sciences

Science rang: professor

Federal'noe gosudarstvennoe byudzhetnoe obrazovatel'noe uchrezhdenie vysshego obrazovaniya Krasnoyarskiy gosudarstvennyy agrarnyy universitet professor · KAFEDRA ZOOTEHNII I TEHNOLOGII PERERABOTKI PRODUKTOV ZhIVOTNOVODSTVA · Russian Federation

Alexander Kolomeytsev

Academic degree: candidate of sciences in biology

Science rang: docent

Krasnoyarsk State Agrarian University Russian Federation · Krasnoyarsk

ORCID

Lyubov' Efimova

Academic degree: candidate of agricultural sciences

Military Educational and Scientific Centre of the Air Force «Professor N.E. Zhukovsky and Y.A. Gagarin Air Force Academy» docent · FGBOU VO Krasnoyarskiy GAU, Institut PBiVM · Russian Federation

ABSTRACT

The objective of the study is to determine the effectiveness of adding rapeseed cake to dairy cow diets during the first four months (122 days) of the first, second, and third lactations. Scientific and economic experiment was conducted at the Solyanskoye Experimental Farm in the Rybinsk District of the Krasnoyarsk Region on Red-and-White cows during the first to third lactations. Six experimental groups were formed: three control and three experimental groups, with 10 cows in each. The first control and experimental groups included first-calf heifers, the second group included second-lactation cows, and the third group included third-lactation cows. The average live weight of first-calf heifers was 503 kg, 559 kg in the second lactation, and 607 kg in the third. Rapeseed cake was the studied factor; it was introduced into the diet of cows in the experimental groups by replacing the same amount of concentrates at a rate of 20 %. The cows in all experimental groups were fed according to the required feeding standards, depending on their physiological condition and the planned productivity. The introduction of rapeseed cake into the diet allowed to increase the content of crude protein by 14.4–15.6 %, undigestible protein by 15.6–16.1, and cleavable protein by 11.4–15.6 % compared to the control groups. It also had a positive effect on milk synthesis processes: the gross milk yield of natural milk in cows in the experimental groups (first, second, and third lactations) increased by 3.0; 2.8; 2.6 %, milk fat by 4.1; 5.9; 6.2 %, and milk protein by 5.1; 5.2; 6.8 %, respectively, compared to the control groups. Feeding rapeseed cake to dairy cows of different age groups proved to be economically beneficial: revenue and profit from milk sales per head of cows in the experimental groups were higher than those in the control groups by 4.7, 5.5, 6.5, and 11.94, 12.7, and 14.3 %, respectively. Introducing rapeseed cake to the diet of dairy cows is rational from both a zootechnical and economic perspective.

KEYWORDS

dairy cows, lactation phase, milk productivity, cow feeding rates, cow diet, rapeseed cake, protein and energy conversion

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GOST

Lazarevich A. N., Lefler T. F., Kolomeytsev A. V., Efimova L. V. EFFECTIVENESS EVALUATION OF RAPESEED CAKE ON MILK PRODUCTIVITY OF COWS IN THE FIRST PHASE OF LACTATION // Bulletin of KSAU. 2026. no. 8. pp. 163-176. DOI: https://doi.org/10.36718/1819-4036-2026-8-163-176. EDN: BEZAZY. (Date of access 01.11.2026).

MLA

Aleksandr Lazarevich, Lefler T. F., Kolomeytsev A. V., Efimova L. V.. "EFFECTIVENESS EVALUATION OF RAPESEED CAKE ON MILK PRODUCTIVITY OF COWS IN THE FIRST PHASE OF LACTATION." Bulletin of KSAU.8 (2026): 163-176. DOI: https://doi.org/10.36718/1819-4036-2026-8-163-176. EDN: BEZAZY.

APA

Lazarevich A. N., Lefler T. F., Kolomeytsev A. V., Efimova L. V. (2026). EFFECTIVENESS EVALUATION OF RAPESEED CAKE ON MILK PRODUCTIVITY OF COWS IN THE FIRST PHASE OF LACTATION. Bulletin of KSAU(8), 163-176. https://doi.org/10.36718/1819-4036-2026-8-163-176 EDN: BEZAZY.

Chicago

Aleksandr Lazarevich, Lefler T. F., Kolomeytsev A. V., Efimova L. V.. "EFFECTIVENESS EVALUATION OF RAPESEED CAKE ON MILK PRODUCTIVITY OF COWS IN THE FIRST PHASE OF LACTATION." Bulletin of KSAU, no. 8 (2026): 163-176. https://doi.org/10.36718/1819-4036-2026-8-163-176. EDN: BEZAZY.

WIKI

{{cite journal | author = Lazarevich A. N., Lefler T. F., Kolomeytsev A. V., Efimova L. V. | title = EFFECTIVENESS EVALUATION OF RAPESEED CAKE ON MILK PRODUCTIVITY OF COWS IN THE FIRST PHASE OF LACTATION | journal = Bulletin of KSAU | year = 2026 | issue = 8 | pages = 163-176 | doi = 10.36718/1819-4036-2026-8-163-176 }} EDN: BEZAZY

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