Improvements in milking management through imitation of calf behaviour
Approximately 20% of the milk within the udder of a cow is stored in the cistern and immediately available for milk removal, while activation of the milk ejection reflex is required for removing the remaining milk stored in the alveolar compartment. The aim of this literature review is to describe,...
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| Formato: | M2 |
| Lenguaje: | Inglés sueco |
| Publicado: |
SLU/Dept. of Animal Nutrition and Management (until 231231)
2013
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| Materias: |
| _version_ | 1855570892760809472 |
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| author | Eriksson, Ida |
| author_browse | Eriksson, Ida |
| author_facet | Eriksson, Ida |
| author_sort | Eriksson, Ida |
| collection | Epsilon Archive for Student Projects |
| description | Approximately 20% of the milk within the udder of a cow is stored in the cistern and immediately available for milk removal, while activation of the milk ejection reflex is required for removing the remaining milk stored in the alveolar compartment. The aim of this literature review is to describe, evaluate and consider implications of the three different suckling activities that the calf displays during a suckling bout. In terms of milking, these phases are represented by pre-stimulation, stimulation during milking and post-stimulation. Pre-stimulation is commonly performed in order to induce the milk ejection reflex, whereby the hormone oxytocin is released and the alveoli in the secretory tissue are contracted. Time requirements regarding pre-stimulation must be considered in relation to lactation stage and milking interval. The pre-stimulation should be sufficient to cause an alveolar contraction that is maintained until start of milking. During the milking phase, the liner within the teat cup should carry out a continuous stimulation and cause a maintained elevated concentration of oxytocin in the circulation during the entire milking. This will maximise milk yield. Furthermore an increased rate of massage during the final minute of milking has been found to increase milk and fat yield. Hence, development of liner settings within modern milking equipment and changes in the pulsation cycle may result in a significant improvement within dairy production. |
| format | M2 |
| id | RepoSLU5733 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2013 |
| publishDateSort | 2013 |
| publisher | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| publisherStr | SLU/Dept. of Animal Nutrition and Management (until 231231) |
| record_format | eprints |
| spelling | RepoSLU57332013-06-25T11:38:12Z Improvements in milking management through imitation of calf behaviour Kalvens beteende som modell för mjölkningsrutiner Eriksson, Ida pre-stimulation milk ejection oxytocin inhibition post-stimulation machine milking Approximately 20% of the milk within the udder of a cow is stored in the cistern and immediately available for milk removal, while activation of the milk ejection reflex is required for removing the remaining milk stored in the alveolar compartment. The aim of this literature review is to describe, evaluate and consider implications of the three different suckling activities that the calf displays during a suckling bout. In terms of milking, these phases are represented by pre-stimulation, stimulation during milking and post-stimulation. Pre-stimulation is commonly performed in order to induce the milk ejection reflex, whereby the hormone oxytocin is released and the alveoli in the secretory tissue are contracted. Time requirements regarding pre-stimulation must be considered in relation to lactation stage and milking interval. The pre-stimulation should be sufficient to cause an alveolar contraction that is maintained until start of milking. During the milking phase, the liner within the teat cup should carry out a continuous stimulation and cause a maintained elevated concentration of oxytocin in the circulation during the entire milking. This will maximise milk yield. Furthermore an increased rate of massage during the final minute of milking has been found to increase milk and fat yield. Hence, development of liner settings within modern milking equipment and changes in the pulsation cycle may result in a significant improvement within dairy production. Syftet med föreliggande litteraturstudie har varit att beskriva mjölkningsrutiner för kor utifrån de tre stimuleringsfaser som naturligt utgör en kalvs beteende under digivning. Dessa stimuleringsfaser är förstimulering, stimulering under mjölkning och efterstimulering. Förstimulering och stimulering under mjölkning förekommer i dagliga mjölkningsrutiner, men inte efterstimulering. Då endast cirka 20% av mjölken är lagrad i juvercisternen och direkt tillgänglig vid mjölkning, samtidigt som resterande mjölk är lagrad i alveolerna och kräver en inducering av mjölknedgivningsreflexen, är det viktigt att förstimulering tillämpas. Under hur lång tid förstimuleringen ska pågå tycks bero på laktationsstadie och juverfyllnad. Förstimuleringen leder till frisättning av hormonet oxytocin, som i sin tur medverkar till att alveolerna i juvret kontraheras. Stimuleringen för nedgivning av mjölken sker under hela mjölkningen. Denna stimulering fås av spengummirörelserna, orsakade av tryckförändringar inne i spenkoppen, och leder till en bibehållen hög koncentration av oxytocin under hela mjölkningen. Gällande efterstimulering har tidigare försök påvisat en ökning i mjölkmängd samt fetthalt då efterstimulering tillämpats. Således tycks det finnas ett behov av att utveckla spengummirörelsen så att mer massage induceras under sista minuten av mjölkning samt behov av att undersöka dess påverkan på mjölkavkastning och mjölksammansättning. Potentiellt kan detta leda till en ökad effektivitet inom mjölkproduktionen. SLU/Dept. of Animal Nutrition and Management (until 231231) 2013 M2 eng swe https://stud.epsilon.slu.se/5733/ |
| spellingShingle | pre-stimulation milk ejection oxytocin inhibition post-stimulation machine milking Eriksson, Ida Improvements in milking management through imitation of calf behaviour |
| title | Improvements in milking management through imitation of calf behaviour |
| title_full | Improvements in milking management through imitation of calf behaviour |
| title_fullStr | Improvements in milking management through imitation of calf behaviour |
| title_full_unstemmed | Improvements in milking management through imitation of calf behaviour |
| title_short | Improvements in milking management through imitation of calf behaviour |
| title_sort | improvements in milking management through imitation of calf behaviour |
| topic | pre-stimulation milk ejection oxytocin inhibition post-stimulation machine milking |