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  • Title: [Influence of the quality and quantity of feed components on digestion, the digestive energy of feed and the required nitrogen feed uptake in the adult rat].
    Author: Hiller HH.
    Journal: Z Tierphysiol Tierernahr Futtermittelkd; 1975 Aug; 36(4):213-24. PubMed ID: 1227171.
    Abstract:
    In this study performed with 14 different food mixtures, the qualitative and quantitative effect of the food components on the digestive energy yealds, and the required nitrogen food comsumption, was investigated on the adult rat. The apparent complete digestion of a food with semi-synthetic components is app. 23% higher than by natural components of the standard food. An increased raw-fibre content of 3-4% decreased the entire digestion of the semi-synthetic components app. 5%. Further observations indicated that an increase in protein digestion as well as general digestive activities were directly related to an increased quantity of semi-synthetic proteins (soya protein, casein). It was however noted that although a high amino acid value was present (92,2%-85,3%), a considerably lower value existed for the protein digestibility of natural components (73,1%). From the calculated daily requirements of 1,5 gN/kg (body weight) of digestible protein, it was established, through investigation on the relationship between the "volume of food consumed in order to satisfy the protein requirement" and the protein content of the ration, that there is a direct dependence between the volume of food consumed and its protein content. In addition a dependence exists between the protein content of the ration and the energy consumed. This relationship between the quantity and the quality of the dependent components and the required essential nutrients have been discussed.
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