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Distillers' Feed Products in Rations for Growing Pigs

Louisville, Kentucky

Abstract

Distillers' dried solubles and distillers' dried grains were compared with tankage as a source of protein in rations for growing pigs from 30 lbs. to approximately 145 lbs. It is evident that the distillers' feed products did not contain all of the essential amino acids at a level required to promote a satisfactory rate of growth. Since the lot fed the distillers' dried grain made slower gains than the one fed distillers' dried solubles, it is apparent that the added fiber was also a factor hindering satisfactory gains.

When distillers' dried solubles were used as a vitamin supplement in concentrates containing a small quantity of animal protein or protein entirely from the vegetable sources, practical rations for growing pigs were formulated which produced results equal to the control ration (Wisconsin trio mixture) and at its equivalent costs.

The addition of linseed meal to the all-vegetable protein concentrate increased the value of this concentrate as measured by the rate of growth and efficiency of gain.

Very little difference was noted between the high- and low-animal protein diets in relation to performance. During the early period or up to the time the pigs attained 100 lbs. in weight, the low level animal protein diet produced slightly faster gains. There was indirect evidence that an increase in the calcium and phosphorus level in the all-vegetable protein supplement when fed on pasture would result in more rapid and economical gains.

In all trials, less supplement was required per 100 lbs. of gain with the supplements containing the highest percentage of crude protein. However, about the same quantity of protein was required for all lots per 100 lbs. of gain. The use of pasture was of significant importance in reducing the cost per unit of gain. Pasture was also of supplementary value to the all-vegetable protein concentrate as indicated by the more economical gains.

¹ Research Department, Joseph E. Seagram & Sons, Inc. Louisville, Ky.