Effect of Dietary Dilution on Performance of Finishing Swine

Abstract
Two group feeding experiments and one individual feeding experiment involving a total of 184 finishing pigs were used to evaluate the effects of dietary dilution with a high-density diluent (sand) or a low-density diluent (cellulose). Under both group and individual feeding conditions sand dilution up to 40% of the diet caused compensatory feed consumption. Weight gain was not depressed until the sand level exceeded 20% of the diet.Feed efficiency was reduced linearly as dietary sand level increased. This occurred in both group-fed and individually-fed pigs. However, utilization of the nondiluent portion of the diet was not affected by sand addition in group-fed pigs, but was improved by sand addition in individually-fed pigs.In the individual feeding study, cellulose dilution up to 40% of the diet produced a linear decrease in gain, feed consumption and feed efficiency; but no differences were observed in gain/feed (less cellulose) ratio.

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