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Nutritive Value of Garbage as a Feed for Swine. III. Vitamin Composition, Digestibility and Nitrogen Utilization of Various Types^{1, 2,}

New Jersey Agricultural Experiment Station, New Brunswick

Abstract

The concentration of carotene, thiamine, riboflavin, niacin and pantothenic acid was determined for composited and individual samples of hotel and restaurant, institutional, military and municipal garbages which were collected over a period of one year. The only difference in vitamin concentration between the various types of garbage was a greater (P<.05) pantothenic acid concentration for municipal garbage than for the other types. Season of the year had no significant effect upon the vitamin concentration of the various garbages. Compared with NRC swine vitamin requirements, on a dry matter basis, the thiamine and niacin concentration is adequate for all types of garbage, the carotene and riboflavin concentration of institutional and military garbages is borderline for the very young growing pig, and the pantothenic acid concentration of all types of garbage is deficient for swine of all ages.

Eight growing-finishing barrows were used in a 4x4 Latin square design to determine digestibility and nitrogen utilization of the various types of cooked garbage. Food intake, weight gain and food efficiency was least (very poor) for pigs fed municipal garbage, intermediate for pigs fed hotel and restaurant garbage, and greatest for pigs fed institutional and military garbage. Considerable difficulty was experienced throughout the trial in getting the pigs to eat the municipal garbage. The digestion coefficients for the components of the proximate analysis were lower for hotel and restaurant and municipal garbage than for institutional and military garbages. Digestion coefficients of institutional and military garbages were higher than those of typical grainmeal diets. Nitrogen balance was not different between hotel and restaurant, institutional and military garbages, but was lower (P<.05) for municipal garbage (barely positive).

¹ Paper of the Journal Series, New Jersey Agricultural Experiment Station, Rutgers—The State University, Department of Animal Sciences, New Brunswick.

² Appreciation is expressed to F. J. Bielk for assistance with chemical determinations, to George Graber for conducting the digestion trial and to Dr. Ron Snee for statistical analysis of data.

³ Present address: Department of Animal Science, Virginia Polytechnic Institute, Blacksburg.

⁴ Present address: Department of Animal Science, University of Tennessee, Knoxville.