Protein Protected Fat for Ruminants 1. Digestion and Performance in Fattening Steers

Abstract

A digestion and performance trial was conducted with 11 individually fed steers receiving an 80% concentrate fattening ration to determine utilization of a formaldehyde treated, spray dried casein:safflower oil homogenate (50% casein:50% safflower oil). The control ration (treatment 1) containing 6% formaldehyde treated casein was fed to three steers. Three steers were fed a ration containing 6% formaldehyde treated casein plus 6% safflower oil (treatment 2) and five steers were fed a ration containing 12% of the formaldehyde treated spray dried casein:safflower oil homogenate (treatment 3). Dry matter digestibility was lowest for treatment 2 (P < .05) and highest for treatment 3. Gross energy digestibility was lower (P < .05) for treatment 2 than the other two treatments, lipid digestibility was lowest on treatment 2 and highest on treatment 3; however, the differences were not significant (P > .05). Safflower oil digestibility as calculated by difference was 69% for treatment 3 compared to 41% for treatment 2. Copyright © 1975. American Society of Animal Science . Copyright 1975 by American Society of Animal Science.