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  • Title: Carbohydrates digestibility and faecal nitrogen excretion in rats fed raw or germinated faba bean (Vicia faba)- and chickpea (Cicer arietinum)-based diets.
    Author: Rubio LA.
    Journal: Br J Nutr; 2003 Aug; 90(2):301-9. PubMed ID: 12908890.
    Abstract:
    Raw or germinated faba bean (Vicia faba minor var. Alameda) and chickpea (Cicer arietinum kabuli var. Athenas) seed meals were incorporated in essential amino acid-supplemented and energy-equalized diets for growing (65 (SD 1) g) male Wistar rats as the only sources of dietary protein. A lactalbumin-based diet was used as the control. Faecal dry weight and N excretion of animals fed legume-containing diets were greater (P<0.01) and DM digestibility lower (P<0.01) than controls. Apparent faecal digestibilities of amino acids were found to be not different or lower (P<0.01) than controls in rats fed diets containing legume seeds, either germinated or not. Total diaminopimelic acid (DAPA) and purine bases excretion were significantly (P<0.01) higher than controls in rats fed both legume seed meals. Faecal bacterial N calculated according to DAPA or purine bases values was similar and significantly higher (P<0.01) than controls in rats fed legume seed meals. Bacterial N accounted for 50 to 80 % of total faecal N in rats fed legume diets. Apparent faecal N digestibility values (53-65 %) of rats fed legume-based diets were lower (P<0.01) than controls, but became substantially higher (85-92 %) when calculated taking into account bacterial N values. Faecal NSP digestibility values for legume diets were 40-57 g/100 g ingested. Germination decreased starch faecal excretion (P<0.05) and increased (P<0.05) faecal starch and NSP digestibilities of faba bean seeds.
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