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The Proteins of Cottonseed Meal¹

II. Nutritive Value

Department of Animal Husbandry, University of Illinois, Urbana, Illinois

ABSTRACT

I. Review of the Previous work on the Nutritive value of the Protein of Cottonseed Meal

Cottonseed meal and flour were found by Richardson and Green (1) to be satisfactory sources of protein for the growth of albino rats when these feeds furnished 18 per cent or more protein to the ration. Mendel (2) states that normal growth has been secured for considerable periods when the globulin of cottonseed was fed in suitable concentration, such concentration having been determined by Osborne and Mendel (3) as 18 per cent of the ration. The latter investigators (4) found that "Cottonseed flour forms a suitable adjuvant for the proteins of corn gluten," producing "satisfactory increments of growth" in chickens. In further studies of the value of certain proteins as supplements to corn gluten, these authors (5) demonstrated that the proteins extracted from cottonseed flour by sodium hydroxide solution were efficient supplements to the proteins of corn gluten for the growth of rats. The use of either the cottonseed globulin or the proteins precipitated from alkali extracts of cottonseed flour in an amount equal to 9 per cent of the ration resulted in "satisfactory growth" and when used to the extent of 6 per cent of the ration "considerable growth" was secured.

¹ The results presented in this paper formed part of a thesis submitted to the Graduate School of the Univeristy of Illinois in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Animal Husbandary.