HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Effects of twice-daily nursing on milk ejection and milk yield during nursing and milking in dairy cows.

Abstract : Milk production and hormonal responses to milking in Holstein cows that were milked twice daily, and that either also nursed calves twice daily 2 h after milking for 9 wk after calving (n = 10) or that served as nonnursing controls (n = 8) were examined to assess how nursing affected responses to machine milking. Milk yield at milking during the 9 wk of nursing was lower in nursing cows compared with control cows (26.1 +/- 1.0 vs. 35.5 +/- 1.1 kg) that were only machine milked. During nursing, the amount drunk by calves increased from 6.5 +/- 0.7 kg/d on wk 1 to 12.5 +/- 1.4 kg/d on wk 9. When this was added to the amount of milk obtained at milking, nursing cows did not differ from control cows in total milk produced (35.5 +/- 1.0 vs. 35.5 +/- 1.0 kg). Residual milk yield, after i.v. injection of oxytocin after milking, was higher in nursing cows than in control cows (8.7 +/- 0.8 vs. 3.2 +/- 0.8 kg). During the 6 wk after weaning, milk production was the same for the nursing and control cows (34.0 +/- 1.35 vs. 34.7 +/- 1.42 kg). Plasma oxytocin levels during milking were greater for control cows than for nursing cows (31.7 +/- 5.4 vs. 18.0 +/- 2.8 pg/mL), but were equivalent to concentrations in nursing cows during nursing (35.5 +/- 7.5 pg/mL). Plasma concentrations of prolactin and cortisol increased after both milking (control vs. nursing: prolactin: 40.2 +/- 6.8 vs. 32.9 +/- 6.1 ng/mL; cortisol: 6.4 +/- 1.23 vs. 7.4 +/- 1.10 ng/mL) and nursing (control vs. nursing: prolactin: 18.6 +/- 7.3 vs. 38.9 +/- 6.6 ng/mL; cortisol: 2.34 +/- 1.15 vs. 7.37 +/- 1.04 ng/mL). In contrast to previous studies, there was no obvious advantage for milk production by keeping a calf with the cow. This appears to result from the reduced oxytocin secretion during milking for the nursing cows.
Document type :
Journal articles
Complete list of metadata

https://hal-agrocampus-ouest.archives-ouvertes.fr/hal-00729927
Contributor : Céline Martel Connect in order to contact the contributor
Submitted on : Friday, September 7, 2012 - 4:04:01 PM
Last modification on : Wednesday, April 6, 2022 - 4:08:19 PM

Links full text

Identifiers

Citation

A.M. de Passille, Pierre-Guy Marnet, H. Lapierre, J. Rushen. Effects of twice-daily nursing on milk ejection and milk yield during nursing and milking in dairy cows.. Journal of Dairy Science, American Dairy Science Association, 2008, 91 (4), pp.1416-22. ⟨10.3168/jds.2007-0504⟩. ⟨hal-00729927⟩

Share

Metrics

Record views

36