[The influence of different fiber types on the fecal nitrogen excretion and the content of volatile fatty acids in the feces of broiler hen breeds].

4 colostomized adult broiler breeding hens each received 120 g mixed feed per day. In addition, the animals were given 10, 20, 30 and 40 g/day cellulose powder or apple pectin resp. and 10, 20, 30 g/day straw cellulose. The DM content of the faeces was increased by cellulose powder and decreased by pectin (P less than 0.01) in comparison to the control group. DM excretion in g/animal and day increased more quickly after supplementing cellulose powder than after supplementing pectin. Straw cellulose produced results in between. The fibre supplements increased N excretion in faeces. It was, however, only significantly increased per 100 g DM intake by large pectin supplements (greater than 20 g). The TCA soluble N quota in the total N of the faeces remained largely unchanged after pectin supplements and increased after cellulose and straw cellulose supplements. Pectin supplements significantly increased the formation of acetate, propionate and butyrate in comparison to the other groups. Propionate could sporadically be detected in the faeces of the other test animals, butyrate not at all. In combination with 40 g apple pectin/animal and day, Bisergon (chinoxalin derivative) increased the formation of the 3 volatile fatty acids significantly.