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The Effect of Fineness of Grinding on the Utilization of Oats by Market Hogs

McGill University¹

Abstract

Conclusions:

1. When pigs of 50 pounds initial weight were fed on coarse, medium,or finely ground oats, adequately supplemented by proteins and minerals,significantly faster gains were obtained as the modulus became finer. Pigs fed coarse, medium, and fine modulus reached 121, 132, and 155 pounds liveweight, respectively in 60 days of feeding.
   
2. Feed consumption over the 60-day growth period increased as the modulus became finer but this was due almost entirely to the increased size of pig because of faster growth rates. Pigs of equal size are approximately equal amounts of feed daily.
   
3. Fibrous portions made up largely of hulls were decidedly unpalatable to the younger pigs, and unless they were finely ground, they were sorted out and refused.
   
4. Grinding oats to various degrees of fineness did not affect the extent to which the older pigs digested the dry matter. When the young pigs were unable to separate the hulls, because of fine grinding, no age differences were noted in dry matter digestibility.
   

¹ Contribution from the Faculty of Agriculture, McGill University, Macdonald College, Que., Canada. Journal Series No. 210.