Journal of Animal Science, Vol 75, Issue 5 1223-1228, Copyright © 1997 by American Society of Animal Science

JOURNAL ARTICLE

The role of nursing frequency in milk production in domestic pigs

M. Spinka, G. Illmann, B. Algers and Z. Stetkova
Ethology Group, Research Institute of Animal Production, Prague-Uhrineves, Czechia.

We conducted three experiments to assess how nursing frequency affects milk output in early pig lactation. In Exp. 1, nursing behavior of 12 individually penned sows was recorded on d 1 through 3 postpartum. The milk output was measured using the weigh-suckle-weigh method. The spontaneous changes in the nursing frequency between d 1 and 2 were positively correlated with the changes in milk output (rS = .64), and the same was true for changes between d 2 and 3 (rS = .77). In Exp. 2, we forced sows, 7 to 8 d after parturition, to nurse every 35 min (10 sows) or every 70 min (eight sows) for 24 h. Sows nursing at short intervals had more nursings without milk ejection, but they gave 27% more milk and their litters gained 44% more weight during the experimental 24 h than sows nursing at long intervals. Litters nursed at long intervals massaged the udder longer after milk ejection. In Exp. 3, milk output was measured after intervals of 35, 50, and 70 min imposed in varied order on 11 experimental sows in the second week of lactation. In a separate recording of two 50-min nursings, we measured milk output from teats that were, or were not, sucked at the first nursing (i.e., giving within-sow comparison of 50 or 100 min). The milk output after 35, 70, and 100 min did not differ from that after 50 min, although there was a tendency for a slight increase with longer intervals. The results suggest that glands are refilled early after milk ejection and that the increase in milk available with prolonged intervals is only slight. As a result, it is the nursing frequency that plays a crucial role in adjusting the milk output.

This article has been cited by other articles:

				M. Berkeveld, P. Langendijk, J. E. Bolhuis, A. P. Koets, J. H. M. Verheijden, and M. A. M. Taverne Intermittent suckling during an extended lactation period: Effects on piglet behavior J Anim Sci, December 1, 2007; 85(12): 3415 - 3424. [Abstract] [Full Text] [PDF]

				K. M. Marshall, W. L. Hurley, R. D. Shanks, and M. B. Wheeler Effects of suckling intensity on milk yield and piglet growth from lactation-enhanced gilts J Anim Sci, September 1, 2006; 84(9): 2346 - 2351. [Abstract] [Full Text] [PDF]

				A. Ramanau, H. Kluge, J. Spilke, and K. Eder Supplementation of Sows with L-Carnitine during Pregnancy and Lactation Improves Growth of the Piglets during the Suckling Period Through Increased Milk Production J. Nutr., January 1, 2004; 134(1): 86 - 92. [Abstract] [Full Text] [PDF]

				J. A. Ford Jr., S. W. Kim, S. L. Rodriguez-Zas, and W. L. Hurley Quantification of mammary gland tissue size and composition changes after weaning in sows J Anim Sci, October 1, 2003; 81(10): 2583 - 2589. [Abstract] [Full Text] [PDF]

				A. K. Johnson and J. J. McGlone Fender design and insulation of farrowing huts: Effects on performance of outdoor sows and piglets J Anim Sci, April 1, 2003; 81(4): 955 - 964. [Abstract] [Full Text] [PDF]