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Effect of Glycerol-Mono-Stearate on Fat Absorption, Growth and Health of Calves^{1, 2,}

Department of Animal Industry, North Carolina Agricultural Experiment Station, Raleigh

ABSTRACT

Three groups of five calves each were fed from the colostral stage to 6 wk. of age diets in which fat was dispersed by different means: Diet A consisted of the basal ingredients plus 3.5 per cent hydrogenated cottonseed oil dispersed by homogenization; diet B, the basal plus 3.0 per cent hydrogenated cottonseed oil dispersed by 0.5 per cent emulsifying agent, glycerol-monostearate and homogenization; and diet C was identical to diet B except that it was unhomogenized.

Blood samples were collected from the calves at 2, 4 and 6 wk. of age for analyses.

No significant differences in hemoglobin were noted.

At 4 and 6 wk., the plasma fat of calves receiving diet B were significantly higher statistically at the 1 per cent level than that of calves receiving diet A, whereas the plasma fat levels from diet C were intermediate, indicating that glycerol-monostearate aided in absorption of lipides.

Plasma choline values of calves fed diet B were significantly higher statistically at a 5 per cent level than those of calves fed diet A, and the levels of those receiving diet C were intermediate.

Post-mortem observations revealed fatty livers in all calves. Analyses of the livers showed no significant differences in either lipide or choline content, but the differences between the per cent lipides in livers of calves fed diets B and C approached significance.

Although the growth of calves fed diet A was somewhat better than that of calves fed either diet B or C, the differences in body weight gains were not significant statistically.

All calves fed the unhomogenized diet (C) lost hair around the anus, tail and inside of thighs.

¹ Approved for publication as paper no. 386 in the Journal series of the North Carolina Agricultural Experiment Station.

² The data contained in this publication are from a thesis presented by J. S. Huff to the Graduate School of the North Carolina State College in partial fulfillment of the requirements for the degree of Master of Science.

³ Present address, Department of Dairy Husbandry, Agricultural and Mechanical College of Texas, College Station.