Variability and correlation of milk urea content with parameters of cow productivity
During the work, 24774 individual milk samples for Ayrshire cows (Karelia, Russia) with an annual milk yield of over 8.300 kg were tested (1.355 cows) every month for the last three years. The urea content averaged 32.19 mg% with a daily yield of 25.5 kg. In cows at the age of the first two lactatio...
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ftdoajarticles:oai:doaj.org/article:955f1cdec02a4bf985b9b5ebcb48301a 2023-05-15T17:01:08+02:00 Variability and correlation of milk urea content with parameters of cow productivity Bolgov Anatoly Komlyk Irina Grishina Natalia 2021-01-01T00:00:00Z https://doi.org/10.1051/e3sconf/202124701004 https://doaj.org/article/955f1cdec02a4bf985b9b5ebcb48301a EN FR eng fre EDP Sciences https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/23/e3sconf_icepp21_01004.pdf https://doaj.org/toc/2267-1242 2267-1242 doi:10.1051/e3sconf/202124701004 https://doaj.org/article/955f1cdec02a4bf985b9b5ebcb48301a E3S Web of Conferences, Vol 247, p 01004 (2021) Environmental sciences GE1-350 article 2021 ftdoajarticles https://doi.org/10.1051/e3sconf/202124701004 2022-12-31T09:26:16Z During the work, 24774 individual milk samples for Ayrshire cows (Karelia, Russia) with an annual milk yield of over 8.300 kg were tested (1.355 cows) every month for the last three years. The urea content averaged 32.19 mg% with a daily yield of 25.5 kg. In cows at the age of the first two lactations, the urea content was higher than for adult animals. The urea content in milk increased from 31.46 mg% to 33.56% with increasing daily yield. In summer and early autumn, urea concentration was lower than in spring and winter. A reliable positive correlation of milk urea was obtained with daily yield, lactose, negative – with protein, dry milk matter, dry non-fat milk residue, the number of somatic cells, and lack of connection was with fat and the freezing temperature of milk. The bull's genotype has a significant effect on the amount of milk urea. Heritability coefficient (h2) was in the range of 0.222 - 0.367. Article in Journal/Newspaper karelia* Directory of Open Access Journals: DOAJ Articles E3S Web of Conferences 247 01004 |
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Directory of Open Access Journals: DOAJ Articles |
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English French |
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Environmental sciences GE1-350 |
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Environmental sciences GE1-350 Bolgov Anatoly Komlyk Irina Grishina Natalia Variability and correlation of milk urea content with parameters of cow productivity |
topic_facet |
Environmental sciences GE1-350 |
description |
During the work, 24774 individual milk samples for Ayrshire cows (Karelia, Russia) with an annual milk yield of over 8.300 kg were tested (1.355 cows) every month for the last three years. The urea content averaged 32.19 mg% with a daily yield of 25.5 kg. In cows at the age of the first two lactations, the urea content was higher than for adult animals. The urea content in milk increased from 31.46 mg% to 33.56% with increasing daily yield. In summer and early autumn, urea concentration was lower than in spring and winter. A reliable positive correlation of milk urea was obtained with daily yield, lactose, negative – with protein, dry milk matter, dry non-fat milk residue, the number of somatic cells, and lack of connection was with fat and the freezing temperature of milk. The bull's genotype has a significant effect on the amount of milk urea. Heritability coefficient (h2) was in the range of 0.222 - 0.367. |
format |
Article in Journal/Newspaper |
author |
Bolgov Anatoly Komlyk Irina Grishina Natalia |
author_facet |
Bolgov Anatoly Komlyk Irina Grishina Natalia |
author_sort |
Bolgov Anatoly |
title |
Variability and correlation of milk urea content with parameters of cow productivity |
title_short |
Variability and correlation of milk urea content with parameters of cow productivity |
title_full |
Variability and correlation of milk urea content with parameters of cow productivity |
title_fullStr |
Variability and correlation of milk urea content with parameters of cow productivity |
title_full_unstemmed |
Variability and correlation of milk urea content with parameters of cow productivity |
title_sort |
variability and correlation of milk urea content with parameters of cow productivity |
publisher |
EDP Sciences |
publishDate |
2021 |
url |
https://doi.org/10.1051/e3sconf/202124701004 https://doaj.org/article/955f1cdec02a4bf985b9b5ebcb48301a |
genre |
karelia* |
genre_facet |
karelia* |
op_source |
E3S Web of Conferences, Vol 247, p 01004 (2021) |
op_relation |
https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/23/e3sconf_icepp21_01004.pdf https://doaj.org/toc/2267-1242 2267-1242 doi:10.1051/e3sconf/202124701004 https://doaj.org/article/955f1cdec02a4bf985b9b5ebcb48301a |
op_doi |
https://doi.org/10.1051/e3sconf/202124701004 |
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E3S Web of Conferences |
container_volume |
247 |
container_start_page |
01004 |
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1766054197090844672 |