Heat stress on the feed consumption, biochemical indicators, production and milk quality of holstein and jersey cows
ABSTRACT: This research compared dry matter intake, milk yield, milk composition, and physiological and biochemical parameters between holstein and jersey cows under heat stress. Holstein (n=8) and Jersey (n=8) cows were allocated into two treatment groups: VA, with cooling, and SVA, with no cooling...
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Universidade Federal de Santa Maria
2025-01-01
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| Series: | Ciência Rural |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782025000400653&lng=en&tlng=en |
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| author | Adriana Hauser Marciél França Rainer Hauser Laiz Perazzoli Bruna Paula Bergamaschi Mendes Izabelly Perdoncini Telles Tatiane Camacho Mendes Luiz Cláudio Miletti André Thaler Neto |
| author_facet | Adriana Hauser Marciél França Rainer Hauser Laiz Perazzoli Bruna Paula Bergamaschi Mendes Izabelly Perdoncini Telles Tatiane Camacho Mendes Luiz Cláudio Miletti André Thaler Neto |
| author_sort | Adriana Hauser |
| collection | DOAJ |
| description | ABSTRACT: This research compared dry matter intake, milk yield, milk composition, and physiological and biochemical parameters between holstein and jersey cows under heat stress. Holstein (n=8) and Jersey (n=8) cows were allocated into two treatment groups: VA, with cooling, and SVA, with no cooling. The experiment included 14 days of adaptation (all the cows were cooled) and 5 days of evaluation (only the VA cows were cooled). Dry matter intake and milk production were measured daily. On Day 0 of the adaptation period and on Days 1, 3 and 5 of the evaluation period, milk samples were collected for composition, physicochemical and somatic cell analysis; blood was collected for analysis of the contents of total proteins, albumin, urea, creatinine, glucose, and beta-hydroxybutyrate. The physiological parameters measured were respiratory rate, surface temperature, rectal temperature and ruminal movements. The experimental design was a 2 × 3 factorial, with two treatments and three days. The data were subjected to ANOVA and tested for normality of the residuals. For dry matter intake, there was a treatment*day interaction, and the milk yield and composition of the treatments were similar. Only the protein content was greater in the VA treatment group than in the SVA group. The milk from SVA cows had greater resistance to ethanol than that from VA cows. The freezing point was greater in the VA treatment group. The concentration of beta-hydroxybutyrate was greater in the VA treatment group. A short heat stress period did not immediately affect production, but it did affect the composition and physicochemical properties of milk. The active cooling of cows with ventilation and sprinkling influences the amount of heat produced and retained, impacting the physiological parameters, blood metabolites, composition, and physicochemical properties of milk. |
| format | Article |
| id | doaj-art-7618dd4a1bbb473ab19346fdb6717449 |
| institution | Kabale University |
| issn | 1678-4596 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj-art-7618dd4a1bbb473ab19346fdb67174492025-01-21T07:36:27ZengUniversidade Federal de Santa MariaCiência Rural1678-45962025-01-0155410.1590/0103-8478cr20220479Heat stress on the feed consumption, biochemical indicators, production and milk quality of holstein and jersey cowsAdriana Hauserhttps://orcid.org/0000-0002-5024-1668Marciél Françahttps://orcid.org/0000-0002-5202-3664Rainer Hauserhttps://orcid.org/0000-0003-0388-4297Laiz Perazzolihttps://orcid.org/0000-0002-3357-8592Bruna Paula Bergamaschi Mendeshttps://orcid.org/0000-0003-1132-9445Izabelly Perdoncini Telleshttps://orcid.org/0000-0002-0600-4876Tatiane Camacho Mendeshttps://orcid.org/0000-0002-1856-4424Luiz Cláudio Milettihttps://orcid.org/0000-0001-5926-0286André Thaler Netohttps://orcid.org/0000-0003-4850-1341ABSTRACT: This research compared dry matter intake, milk yield, milk composition, and physiological and biochemical parameters between holstein and jersey cows under heat stress. Holstein (n=8) and Jersey (n=8) cows were allocated into two treatment groups: VA, with cooling, and SVA, with no cooling. The experiment included 14 days of adaptation (all the cows were cooled) and 5 days of evaluation (only the VA cows were cooled). Dry matter intake and milk production were measured daily. On Day 0 of the adaptation period and on Days 1, 3 and 5 of the evaluation period, milk samples were collected for composition, physicochemical and somatic cell analysis; blood was collected for analysis of the contents of total proteins, albumin, urea, creatinine, glucose, and beta-hydroxybutyrate. The physiological parameters measured were respiratory rate, surface temperature, rectal temperature and ruminal movements. The experimental design was a 2 × 3 factorial, with two treatments and three days. The data were subjected to ANOVA and tested for normality of the residuals. For dry matter intake, there was a treatment*day interaction, and the milk yield and composition of the treatments were similar. Only the protein content was greater in the VA treatment group than in the SVA group. The milk from SVA cows had greater resistance to ethanol than that from VA cows. The freezing point was greater in the VA treatment group. The concentration of beta-hydroxybutyrate was greater in the VA treatment group. A short heat stress period did not immediately affect production, but it did affect the composition and physicochemical properties of milk. The active cooling of cows with ventilation and sprinkling influences the amount of heat produced and retained, impacting the physiological parameters, blood metabolites, composition, and physicochemical properties of milk.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782025000400653&lng=en&tlng=enheatthermotolerancephysicochemical properties of milk |
| spellingShingle | Adriana Hauser Marciél França Rainer Hauser Laiz Perazzoli Bruna Paula Bergamaschi Mendes Izabelly Perdoncini Telles Tatiane Camacho Mendes Luiz Cláudio Miletti André Thaler Neto Heat stress on the feed consumption, biochemical indicators, production and milk quality of holstein and jersey cows Ciência Rural heat thermotolerance physicochemical properties of milk |
| title | Heat stress on the feed consumption, biochemical indicators, production and milk quality of holstein and jersey cows |
| title_full | Heat stress on the feed consumption, biochemical indicators, production and milk quality of holstein and jersey cows |
| title_fullStr | Heat stress on the feed consumption, biochemical indicators, production and milk quality of holstein and jersey cows |
| title_full_unstemmed | Heat stress on the feed consumption, biochemical indicators, production and milk quality of holstein and jersey cows |
| title_short | Heat stress on the feed consumption, biochemical indicators, production and milk quality of holstein and jersey cows |
| title_sort | heat stress on the feed consumption biochemical indicators production and milk quality of holstein and jersey cows |
| topic | heat thermotolerance physicochemical properties of milk |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782025000400653&lng=en&tlng=en |
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