Untersuchungen zur Fraktionierung des Rohfettes in ausgewählten Grünfuttermitteln und Getreidekörnern

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Abstract
The quotas of the unsaponifiable and of the total fatty acids in the crude and total fat of 30 feedstuff samples, 27 of which were green fodder of various stages of vegetation and growths and 3 varieties of grains, were investigated. The components, unsaponifiable and total fatty acids, are dependent on the feedstuff, the stage of vegetation and the treatment of the samples before the extraction with petroleum ether (with and without HCl-hydrolysis). HCl treatment before fat extraction (total fat) increases the content of the unsaponifiable fatty acids and, in particular, the total fatty acids. The recommendation therefore is generally to carry out a preliminary hydrolysis with 4 N HCl in feedstuff analysis for the determination of the fat content. The content of the unsaponifiable fatty acids in the total content of grasses and legumes averages 30%. The results are discussed from the point of view of energetic feed evaluation.

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