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Influence of sapropel on the activity of intestinal peptidases of broiler chickens

V. V. Kuz'mina scopus  -  Yaroslavl State Agricultural Academy, Russian Federation
*E. G. Skvortsova scopus  -  Yaroslavl State Agricultural Academy, Russian Federation
E. A. Pivovarova  -  Yaroslavl State Agricultural Academy, Russian Federation
A. S. Bushkareva  -  Yaroslavl State Agricultural Academy, Russian Federation
U. A. Vostrova  -  Yaroslavl State Agricultural Academy, Russian Federation
A.V. Poltoratskaya  -  Yaroslavl State Agricultural Academy, Russian Federation

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Abstract

At the beginning of the experiment, the weight of weekly cockerels of the Hisex White egg cross (n = 90) was 64.6 ± 0.47 g. At the age of one week old, 3 groups (30 birds in each group) were formed. They received complete feed. The first group served as a control. The chickens of the second and third groups received combined fodder, in which 3% and 5% of the feed weight was replaced with dry sapropel. The dry sapropel (3% of the daily feed weight) increased the activity of casein-lytic and hemoglobin-lytic peptidases in the chyme by 1.5 (Р<0.05), in large intestine mucosa by 1.3 (Р<0.05) and in small intestine mucosa by 1.7 times (Р<0.01) compared with the control. The increase of sapropel concentration in feed up to 5% did not lead to a further increase in the activity of peptidases. The activity of peptidases were minimal at pH 5 and pH 12 and reached maximal at pH 7–8. The optimal dose of dry sapropel introduced into the diet of chickens to that stimulated the digestive processes is 3% of the mass of feed.

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Influence of sapropel on the activity of intestinal peptidases in broiler chickens
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Keywords: broiler chickens; sapropel; intestines; peptidase activity; pH dependence

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Last update: 2021-06-25 01:03:01

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Last update: 2021-06-25 01:03:01

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