[Effect of different drinking frequencies and milk treatments on the digestive flow in the duodenum of the calf].
The digesta dry matter and N-passage rates at the duodenum were measured at 3-to-8-week-old calves with duodenal re-entrant cannulae within 24 hours. The animals received the amount of milk in 1,2 and 4 meals. The milk enriched with 2% fat was given fresh, treated with hydrochloric acid or with formaldehyde. The calves received their feed in buckets. The feeding frequency influenced the chyme- and N-passage rates. After the feeding of 7 l milk in 4, 2 and 1 portions resp. up to 1,200; 1,600 and 2,200 ml chyme resp. passed the duodenum in the first hour after the feeding. More frequent feeding thus guarantees a more continuous flow of the chyme. On average the amount of chyme reached 180 . . . 186% of the amount of milk taken in independent of the feeding frequency whereas the N-amount corresponded to that contained in the feed. Formaldehyde treatment increased the amount of chyme to more than 200% of the milk intake and disturbed the coagulation process in the abomasum. The souring of the milk supported the effective protein hydrolysis in the abomasum due to a quick decrease of the pH-value and, after the feeding in 1 portion, prevented an "overflow" of the abomasum.
D000818:Animals; D002417:Cattle / Q000378:metabolism*; D004063:Digestion / Q000187:drug effects; D004386:Duodenum / Q000378:metabolism*; D005520:Food Preservatives / Q000494:pharmacology; D005557:Formaldehyde / Q000494:pharmacology; D006851:Hydrochloric Acid / Q000494:pharmacology; D008892:Milk / Q000378:metabolism*; D013997:Time Factors
D005520:Food Preservatives; D005557:Formaldehyde; D006851:Hydrochloric Acid
Der Einfluss verschiedener Tränkfrequenzen und Milchbehandlungen auf den Digestafluss am Duodenum des Kalbes.