Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling
ABSTRACT: This study vised to detect possible changes in chemical and cellular composition of cow’s milk at different milking sessions and to test if proportional or composite milk sampling can be used instead of separate milk analysis. Two experiments were conducted: one in cows milked thrice dail...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universidade Federal de Santa Maria
|
| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600654&lng=en&tlng=en |
| _version_ | 1818138370526674944 |
|---|---|
| author | Carlos Bondan Jéssica Aneris Folchini Mirela Noro Karine Martini Machado Eduardo Muhls Félix Hilário Diaz González |
| author_facet | Carlos Bondan Jéssica Aneris Folchini Mirela Noro Karine Martini Machado Eduardo Muhls Félix Hilário Diaz González |
| author_sort | Carlos Bondan |
| collection | DOAJ |
| description | ABSTRACT: This study vised to detect possible changes in chemical and cellular composition of cow’s milk at different milking sessions and to test if proportional or composite milk sampling can be used instead of separate milk analysis. Two experiments were conducted: one in cows milked thrice daily and the other one in cows milked twice daily. In both experiments, three milk samples were collected from each cow in each milking session in order to determine milk composition at each milking; to have a composite sample, i.e., a single sample from the same aliquots of milk from each milking session; and to have a proportional sample, i.e., a single sample from each milking session in a volume proportional to milk volume yielded. Fat content and fat to protein ratio were higher in the afternoon on both experiments. Protein content was larger in the afternoon on cows milked twice daily, but not on cows milked thrice daily. Lactose level was not different across the milking sessions in any of the experiments. The urea level was higher in the afternoon and evening milking on cows milked thrice daily, and in the morning milking on cows milked twice daily. Somatic cell count did not differ between milking in any experiment. No difference in milk composition was noted between proportional and composite samples on cows milked thrice or twice daily. The collection of proportional and composite samples is recommended in twice or thrice daily milking sessions so that the analysis of milk components becomes more easy and cheap. |
| first_indexed | 2024-12-11T10:11:07Z |
| format | Article |
| id | doaj.art-7c53d254dceb4a0c86779a66f95c0362 |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-11T10:11:07Z |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-7c53d254dceb4a0c86779a66f95c03622022-12-22T01:11:44ZengUniversidade Federal de Santa MariaCiência Rural1678-459649610.1590/0103-8478cr20181004S0103-84782019000600654Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite samplingCarlos BondanJéssica Aneris FolchiniMirela NoroKarine Martini MachadoEduardo MuhlsFélix Hilário Diaz GonzálezABSTRACT: This study vised to detect possible changes in chemical and cellular composition of cow’s milk at different milking sessions and to test if proportional or composite milk sampling can be used instead of separate milk analysis. Two experiments were conducted: one in cows milked thrice daily and the other one in cows milked twice daily. In both experiments, three milk samples were collected from each cow in each milking session in order to determine milk composition at each milking; to have a composite sample, i.e., a single sample from the same aliquots of milk from each milking session; and to have a proportional sample, i.e., a single sample from each milking session in a volume proportional to milk volume yielded. Fat content and fat to protein ratio were higher in the afternoon on both experiments. Protein content was larger in the afternoon on cows milked twice daily, but not on cows milked thrice daily. Lactose level was not different across the milking sessions in any of the experiments. The urea level was higher in the afternoon and evening milking on cows milked thrice daily, and in the morning milking on cows milked twice daily. Somatic cell count did not differ between milking in any experiment. No difference in milk composition was noted between proportional and composite samples on cows milked thrice or twice daily. The collection of proportional and composite samples is recommended in twice or thrice daily milking sessions so that the analysis of milk components becomes more easy and cheap.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600654&lng=en&tlng=enamostra compostacomposição do leiteprodução de leitecélulas somáticas do leiteamostra proporcional |
| spellingShingle | Carlos Bondan Jéssica Aneris Folchini Mirela Noro Karine Martini Machado Eduardo Muhls Félix Hilário Diaz González Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling Ciência Rural amostra composta composição do leite produção de leite células somáticas do leite amostra proporcional |
| title | Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling |
| title_full | Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling |
| title_fullStr | Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling |
| title_full_unstemmed | Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling |
| title_short | Variation of cow’s milk composition across different daily milking sessions and feasibility of using a composite sampling |
| title_sort | variation of cow s milk composition across different daily milking sessions and feasibility of using a composite sampling |
| topic | amostra composta composição do leite produção de leite células somáticas do leite amostra proporcional |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600654&lng=en&tlng=en |
| work_keys_str_mv | AT carlosbondan variationofcowsmilkcompositionacrossdifferentdailymilkingsessionsandfeasibilityofusingacompositesampling AT jessicaanerisfolchini variationofcowsmilkcompositionacrossdifferentdailymilkingsessionsandfeasibilityofusingacompositesampling AT mirelanoro variationofcowsmilkcompositionacrossdifferentdailymilkingsessionsandfeasibilityofusingacompositesampling AT karinemartinimachado variationofcowsmilkcompositionacrossdifferentdailymilkingsessionsandfeasibilityofusingacompositesampling AT eduardomuhls variationofcowsmilkcompositionacrossdifferentdailymilkingsessionsandfeasibilityofusingacompositesampling AT felixhilariodiazgonzalez variationofcowsmilkcompositionacrossdifferentdailymilkingsessionsandfeasibilityofusingacompositesampling |