HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Bowland, J. P. Articles by Bohstedt, G. Search for Related Content PubMed Articles by Bowland, J. P. Articles by Bohstedt, G.

Effect of Lactation and Ration on the Fat and Vitamin A Level of Sow's Milk¹

From the Departments of Animal Husbandry and Biochemistry, University of Wisconsin, Madison

ABSTRACT

1. The fat and vitamin A levels of colostrum and milk are reported for the entire lactational period for ten sows carried through growth and gestation on pasture, and ten sows carried through growth and gestation in dry lot.
   
2. A gradual decline in fat content of the milk as lactation advanced was indicated in both groups.
   
3. An increase in vitamin A content of the milk fat toward the end of lactation was evident in the pasture sows, but a reverse trend occurred in the dry-lot sows. The mean values for fat were: first-day colostrum from pasture sows 6.73 per cent, from dry-lot sows 6.45 per cent; normal milk from pasture sows 6.12 per cent, from dry-lot sows 7.45 per cent of the milk. The mean values for vitamin A were: first-day colostrum from pasture sows 40.23 per g. of fat, from dry-lot sows 25.41 per g. of fat; normal milk from pasture sows 10.93 per g. fat, from dry-lot sows 5.69 per g. of fat.
   
4. No breed difference in fat content of the milk or vitamin A content of the fat was apparent between Chester White and Poland China sows.
   

¹ Published with the approval of the Director of the Wisconsin Agricultural Experiment Station, Madison.