Masters Theses

Date of Award

6-1961

Degree Type

Thesis

Degree Name

Doctor of Education

Major

Animal Husbandry

Major Professor

J. K. Bletner

Committee Members

O. Glen Hall, O. E. Goff

Abstract

In the past twenty-five years, the production of broilers has moved from the small farmer with a few dual purpose birds to the integrated producer of thousands of cross-bred, meat-type birds. As the numbers and types of birds have changed, the nutritionist has been faced with the task of developing diets that will produce a bird possessing better market characteristics on less feed and in a shorter period of time.

In the quest for diets that would give superior results, the nutritionist has examined new feedstuffs and recombinations of old ones. To be considered for inclusion in a broiler diet, it is desirable that a feedstuff should be available in quantity the year around at a competitive price, perform its function efficiently, and contribute to the production of a desirable carcass. Synthetically produced amino acids and vitamins and industrial by-products such as stabilized animal fat and feather meal, are examples of materials that have been introduced into the practical broiler diet.

Before these new materials were placed in broiler diets, studies were conducted to determine the amounts and combinations of these materials that would give the best results. In an effort to establish the value of certain feedstuffs, many were included in semi-purified diets. Much of the published data disagree in regard to results that might be expected from these same feedstuffs when incorporated in "practical" diets. Some of the discrepancies between the calculated and actual response of chicks to a feedstuff may be attributed to factors such as time of year, type of chick used, design of the study, or combinations of other feedstuffs included in the diet-

After considering the lack of agreement of reported work, a series of studies using varying amounts of stabilized yellow grease, soybean oil meal, and synthetic amino acids was initiated. These studies were designed to develop a high protein-high energy broiler diet using soybean oil meal as the principal source of protein and stabilized yellow grease and ground yellow corn as the principal sources of energy.

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