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Limited-Fed Diets Equal in Total Protein and Energy to Full-Fed Diets for Pigs in Drylot and Pasture¹

Georgia Station, Experiment, Georgia 30212

Abstract

Limiting the feed intake of swine by hand feeding has resulted in learner carcasses (Ellis and Zeiler, 1932; Shorrock, 1940; Winters, Sierk and Cummings, 1949; Brugman, 1950; Smith, Cole and Hobbs, 1952). Woodman and Evans (1943) discussed the frequent high evaluation of forage when pigs were limited-fed poor quality diets on pasture and compared with drylot-fed pigs given similar diets containing no green forage. Morrison (1956) summarized 32 experiments where some limited feeding on forage occurred. Limitation of concentrate did not reduce the feed required per unit of gain. While there are many reports of feeding tests in which limited and equal feeding of hogs on pasture are compared with drylot, there appears to be no test comparing limited feeding diets on a weight basis but providing crude protein or energy equal to that given the full-fed hogs.

The purpose of this experiment was to compare the performance of pigs receiving a full or limited intake of a diet in drylot or on pasture and to compare diets limited in weight but equal in crude protein or energy to the full-fed diets for production and carcass characteristics of swine.

¹ Journal Paper No. 950, University of Georgia College of Agricultural Experiment Stations, Georgia Station, Experiment.