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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 2000;13(2): 188-191.
DOI: https://doi.org/10.5713/ajas.2000.188    Published online January 1, 2000.
Separation of Ether-Soluble Neutral Extract of a Commercial High-Grain Feed Stimulating Hay Intake in Cattle
M. Shahjalal, H. Dohi, T. Kosako, Y. Hayashi
Appetite stimulant ether-soluble neutral extract of a high-grain compound feed was separated into four fractions with an open column of silica gel chromatograph using four carrier solutions containing n-pentane and diethyl ether as 100:0 (Fraction A), 90:10 (Fraction B), 75:25 (Fraction C) and 0:100 (Fraction D). The stimulative effects of the fractions were examined by comparing the intake of hay (with or without the fractions) in two-choice test bioassays with cattle. The Fractions A, B and C of the neutral extract stimulated (p<0.05) hay consumption in cattle, whereas Fraction D had no effect on selective feeding when compared with the control fraction. Furthermore, Fractions A, B and C had higher (p<0.05) feeding stimulative indices (FSI) than that of the Fraction D. The results suggest that chemical stimulants to increase palatability of hay are present in the neutral Fractions A, B and C of high-grain concentrate.
Keywords: Appetite Stimulant; Neutral Extract; Chromatograph; Grain; Cattle; Separation
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