Udder quarter milk composition at different levels of somatic cell count in cow composite milk
Automatic milking systems have made possible the separation of high- and low-quality milk at the udder quarter level during the milking process. The aim of this study was to investigate the composition and yield of milk from individual udder quarters to determine whether deteriorated milk compositio...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2009-01-01
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| Series: | Animal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1751731109004042 |
| _version_ | 1818864922435518464 |
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| author | L. Forsbäck H. Lindmark-Månsson A. Andrén M. Åkerstedt K. Svennersten-Sjaunja |
| author_facet | L. Forsbäck H. Lindmark-Månsson A. Andrén M. Åkerstedt K. Svennersten-Sjaunja |
| author_sort | L. Forsbäck |
| collection | DOAJ |
| description | Automatic milking systems have made possible the separation of high- and low-quality milk at the udder quarter level during the milking process. The aim of this study was to investigate the composition and yield of milk from individual udder quarters to determine whether deteriorated milk composition occurs in udders that are assumed to be healthy and whether quarters with high-quality milk are found in udders with high milk somatic cell count (SCC). Milk samples were collected on one occasion from 90 cows at udder quarter level and cow composite level. The milk was analyzed for content of total protein, whey protein, casein, fat, lactose, citric acid and SCC; milk yield was registered. The cows were divided into three groups depending on the SCC of their composite milk. Cows in group 1, cow composite SCC < 100 000 cells/ml, were assumed to have healthy udders. However, instances of increased SCC and decreased milk quality were discovered in one or more udder quarters of approximately 30% of the group. Cows in group 2, cow composite SCC of 100 000 to 300 000 cells/ml, and group 3, cow composite SCC > 300 000 cells/ml, were assumed to have affected udders. However, the majority of these cows had one or more udder quarters in which increased SCC and deteriorated milk quality were not detected. Calculations of bulk-tank milk values, when separation of milk from affected udder quarters was performed, indicate that SCC changes to a much greater degree compared to the other milk components. These results show that milk from affected udder quarters suffers compositional changes, but calculations of simulated separation indicate that the compositional changes in bulk-tank milk are small. The effect of separation of milk from individual udder quarters on bulk-tank milk needs to be further studied. |
| first_indexed | 2024-12-19T10:39:21Z |
| format | Article |
| id | doaj.art-441dc5fb179d4ef3b879f87154c6407f |
| institution | Directory Open Access Journal |
| issn | 1751-7311 |
| language | English |
| last_indexed | 2024-12-19T10:39:21Z |
| publishDate | 2009-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Animal |
| spelling | doaj.art-441dc5fb179d4ef3b879f87154c6407f2022-12-21T20:25:30ZengElsevierAnimal1751-73112009-01-0135710717Udder quarter milk composition at different levels of somatic cell count in cow composite milkL. Forsbäck0H. Lindmark-Månsson1A. Andrén2M. Åkerstedt3K. Svennersten-Sjaunja4Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Uppsala, SwedenSwedish Dairy Association, Lund, SwedenDepartment of Food Science, Swedish University of Agricultural Sciences, Uppsala, SwedenDepartment of Food Science, Swedish University of Agricultural Sciences, Uppsala, SwedenDepartment of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Uppsala, SwedenAutomatic milking systems have made possible the separation of high- and low-quality milk at the udder quarter level during the milking process. The aim of this study was to investigate the composition and yield of milk from individual udder quarters to determine whether deteriorated milk composition occurs in udders that are assumed to be healthy and whether quarters with high-quality milk are found in udders with high milk somatic cell count (SCC). Milk samples were collected on one occasion from 90 cows at udder quarter level and cow composite level. The milk was analyzed for content of total protein, whey protein, casein, fat, lactose, citric acid and SCC; milk yield was registered. The cows were divided into three groups depending on the SCC of their composite milk. Cows in group 1, cow composite SCC < 100 000 cells/ml, were assumed to have healthy udders. However, instances of increased SCC and decreased milk quality were discovered in one or more udder quarters of approximately 30% of the group. Cows in group 2, cow composite SCC of 100 000 to 300 000 cells/ml, and group 3, cow composite SCC > 300 000 cells/ml, were assumed to have affected udders. However, the majority of these cows had one or more udder quarters in which increased SCC and deteriorated milk quality were not detected. Calculations of bulk-tank milk values, when separation of milk from affected udder quarters was performed, indicate that SCC changes to a much greater degree compared to the other milk components. These results show that milk from affected udder quarters suffers compositional changes, but calculations of simulated separation indicate that the compositional changes in bulk-tank milk are small. The effect of separation of milk from individual udder quarters on bulk-tank milk needs to be further studied.http://www.sciencedirect.com/science/article/pii/S1751731109004042dairy cowquarter milkSCCmilk compositionmilk quality |
| spellingShingle | L. Forsbäck H. Lindmark-Månsson A. Andrén M. Åkerstedt K. Svennersten-Sjaunja Udder quarter milk composition at different levels of somatic cell count in cow composite milk Animal dairy cow quarter milk SCC milk composition milk quality |
| title | Udder quarter milk composition at different levels of somatic cell count in cow composite milk |
| title_full | Udder quarter milk composition at different levels of somatic cell count in cow composite milk |
| title_fullStr | Udder quarter milk composition at different levels of somatic cell count in cow composite milk |
| title_full_unstemmed | Udder quarter milk composition at different levels of somatic cell count in cow composite milk |
| title_short | Udder quarter milk composition at different levels of somatic cell count in cow composite milk |
| title_sort | udder quarter milk composition at different levels of somatic cell count in cow composite milk |
| topic | dairy cow quarter milk SCC milk composition milk quality |
| url | http://www.sciencedirect.com/science/article/pii/S1751731109004042 |
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