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Peter Kappel Theil

Impact of sow and litter characteristics on colostrum yield for onset of lactation, and milk yield of sows

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DOI

  • C N Vadmand, University of Copenhagen, Faculty of Health and Medical Sciences, Department of Veterinary Disease Biology, Bülowsvej 17, DK-1870 Frederiksberg, Denmark., Denmark
  • Uffe Krogh Larsen, Denmark
  • C F Hansen, Department of Large Animal Science, Faculty of Health and Medical Science, University of Copenhagen, DK-1870 Frederiksberg C, Denmark
  • Peter Kappel Theil
The aim of the present study was to estimate the concurrent impact of sow and litter characteristics on sow productivity. Sow productivity was defined as colostrum yield (CY), onset of lactation (the time point when milk secretion increased steeply, approximately 31 h postpartum), transition milk yield (MY; 36–60 h postpartum), and the mean MY in wk 1 to 4 of lactation. Therefore, the study investigated how factors related with sow nutrition, litter characteristics, farrowing characteristics, and composition of mammary secreta affected sow productivity. Data obtained from 5 previous sow experiments were used. The variables describing sow productivity were all defined as dependent variables and Pearson coefficient of correlation was used to examine relations among dependent variables. The results showed that CY was positively correlated with transition MY and MY in wk 1 and 2 of lactation (P < 0.05), and time for onset of lactation was positively correlated with transition MY (P < 0.05) but negatively correlated with MY in wk 1, 2, and 4 of lactation (P < 0.05). Multivariate regression analyses with a backward elimination approach were performed for each dependent variable to investigate relations with characteristics of sow nutrition, litter size, farrowing, and composition of mammary secreta (independent variables). Litter size was positively related with both CY and MY in wk 1 to 4 (P < 0.001). Milk protein concentration was negatively correlated with MY in all 4 wk (P < 0.01), which indicated that high yielding sows were unable to maintain milk protein synthesis during lactation. Additionally, mean intake of ME prepartum (P < 0.05) was included in the regression model for transition MY and the BW of the sow on d 3 was included in the regression model for MY in wk 1 (P < 0.05). Except litter equlization, none of the observed independent variables were related with time for onset of lactation. In conclusion, when maximizing sow productivity in the future, it may be rewarding to pay attention to sow productivity in the colostrum period and around time for onset of lactation, and special attention should be given to dietary supplies of protein and essential AA.
Original languageEnglish
JournalJournal of Animal Science
Volume93
Issue5
Pages (from-to)2488-2500
Number of pages13
ISSN0021-8812
DOIs
Publication statusPublished - May 2015

Bibliographical note

Data fra flere projekter er involveret her. Så vi tilknytter den ikke noget specifikt. 3.2-16/metm

    Research areas

  • mammary secreta, milk yield, onset of lactation, protein, transition milk

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