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Effect of age and exogenous amylase and protease on development of the digestive tract, pancreatic enzyme activities and digestibility of nutrients in young meat-type chicks
Year:
1995
Authors :
Nitsan, Zafrira
;
.
Volume :
35
Co-Authors:
Mahagna, M., The Hebrew University of Jerusalem, Faculty of Agriculture, Department of Animal Sciences, PO Box 12, Rehovot, 76100, Israel
Nir, I., The Hebrew University of Jerusalem, Faculty of Agriculture, Department of Animal Sciences, PO Box 12, Rehovot, 76100, Israel
Larbier, M., INRA, SRA, 37380 Nouzilly, France
Nitsan, Z., Agricultural Research Organization, The Volcani Center, PO Box 6, Bet Dagan, 50250, Israel
Facilitators :
From page:
201
To page:
212
(
Total pages:
12
)
Abstract:
Day-old male meat-type chicks were fed a commercial starter diet supplemented with 2 levels of enzyme preparations containing amylase and proteases up to 14 d of age. Enzyme supplementation had no significant effect on feed intake or growth rate, and was accompagnied by a significant decrease in gizzard content and small intestine weight. The intestine contents increased and this increase was accompanied by a significant decrease in its pH. Enzyme supplementation depressed the activity of chymotrypsin in the pancreas and the activity of amylase, trypsin and chymotrypsin in the intestinal contents. Some carry-over effects were observed on d 42,4 weeks after the cessation of the enzyme supplements. These were mainly a significant depression in the activity of trypsin in the intestinal contents. In a balance study, diets supplemented with 0, 250 and 1 000 μg/kg enzyme preparations were supplied. Exogenous enzyme supplements had no significant effect on the digestibility of all the nutrients studied except for the highest level of enzyme supplementation, which improved slightly but consistently the digestibility of amino acids. Some age effects were observed, mainly a decrease in the digestibility of fat and starch, and in the ME of the diet from weeks 1 to 2 followed by an increase during week 3. Protein digestibility and retention of nitrogen decreased with age. © 1995 Elsevier/INRA.
Note:
Related Files :
aging
Amino Acids
amylase
Animal
Chickens
drug effect
Growth, Development and Aging
Male
metabolism
Pancreas
pH
Show More
Related Content
More details
DOI :
10.1016/0926-5287(96)80192-4
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29356
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:46
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Scientific Publication
Effect of age and exogenous amylase and protease on development of the digestive tract, pancreatic enzyme activities and digestibility of nutrients in young meat-type chicks
35
Mahagna, M., The Hebrew University of Jerusalem, Faculty of Agriculture, Department of Animal Sciences, PO Box 12, Rehovot, 76100, Israel
Nir, I., The Hebrew University of Jerusalem, Faculty of Agriculture, Department of Animal Sciences, PO Box 12, Rehovot, 76100, Israel
Larbier, M., INRA, SRA, 37380 Nouzilly, France
Nitsan, Z., Agricultural Research Organization, The Volcani Center, PO Box 6, Bet Dagan, 50250, Israel
Effect of age and exogenous amylase and protease on development of the digestive tract, pancreatic enzyme activities and digestibility of nutrients in young meat-type chicks
Day-old male meat-type chicks were fed a commercial starter diet supplemented with 2 levels of enzyme preparations containing amylase and proteases up to 14 d of age. Enzyme supplementation had no significant effect on feed intake or growth rate, and was accompagnied by a significant decrease in gizzard content and small intestine weight. The intestine contents increased and this increase was accompanied by a significant decrease in its pH. Enzyme supplementation depressed the activity of chymotrypsin in the pancreas and the activity of amylase, trypsin and chymotrypsin in the intestinal contents. Some carry-over effects were observed on d 42,4 weeks after the cessation of the enzyme supplements. These were mainly a significant depression in the activity of trypsin in the intestinal contents. In a balance study, diets supplemented with 0, 250 and 1 000 μg/kg enzyme preparations were supplied. Exogenous enzyme supplements had no significant effect on the digestibility of all the nutrients studied except for the highest level of enzyme supplementation, which improved slightly but consistently the digestibility of amino acids. Some age effects were observed, mainly a decrease in the digestibility of fat and starch, and in the ME of the diet from weeks 1 to 2 followed by an increase during week 3. Protein digestibility and retention of nitrogen decreased with age. © 1995 Elsevier/INRA.
Scientific Publication
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