English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Substituting the skim-milk in milk replacers by other sources of protein increases the rate at which lipid and protein are emptied from the stomach. As a result, the digestive and metabolic utilization of these components might be unfavorably affected due to their more brief contact with abomasal digestive secretions and to their massive arrival in the duodenum. The aim of this experiment was to study the respective effects of the latter two factors. Seven preruminant calves, fitted with a catheter in the proximal duodenum, were given two diets having very different kinetics in respect to gastric emptying. The protein in these diets was supplied either almost solely by skim-milk powder (control feed) or mainly by a partially hydrolysed white fish concentrate (fish feed) (table 1). The milk replacers were either ingested by the animals or infused slowly or quickly into the.duodenum to simulate previously observed gastric emptying rates (Guilloteau et al., 1975) for protein in two diets similar to those used in the present experiment. Bypassing the mouth and the abomasum did not seem to have any significant effect on animal health, particularly as far as the frequency of diarrhea was concerned (fig. 1). The apparent digestibility of each diet decreased when that diet was infused into the duodenum at the gastric emptying rate of its protein (slow infusion of the control diet, quick infusion of the fish diet) (table 2) ; infusion at a higher rate (quick infusion of the control diet) increased this effect, while infusion at a lower rate (slow infusion of the fish diet) suppressed it. This decrease in apparent digestibility was more marked for lipid and minerals than for protein. The slow infusion of the fish diet had little effect on faecal amino acid composition (table 4). On the other hand, rapid infusion of the control diet seemed to cause a decrease in

Importance of the abomasum in digestion in the preruminant calf