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New Nitrogen Feed Compounds for Ruminants—A Laboratory Evaluation

Du Pont Experimental Station¹

Abstract

A RUMINANT by virtue of the microflora in its spacious tureen is capable of utilizing simple nitrogen compounds to satisfy its protein requirements (Loosli et al. 1949). This is in addition to its ability to efficiently utilize the cellulosic material in the diet and to synthesize the required water soluble vitamins.

Although the ruminant can utilize nonprotein nitrogen compounds, urea is the principal material in this category that is now being used commercially in the ruminant feeds. In the past, ammonium bicarbonate and phosphate have been -used in feeds but these have been unsatisfactory for one reason or another. Urea is particularly suited as a feed ingredient since it is an economical, odorless material of high nitrogen content and biological availability. The amount that can be used in a feed is limited somewhat by the rapid rate at which it can be converted to ammonia in the rumen.Other nonprotein nitrogen compounds which might not have this limitation were investigated as possible substitutes for urea.

¹ Polychemicals Department, E. I. du Pont de Nemours & Co., Inc., Wilmington, Delaware.