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פותח על ידי קלירמאש פתרונות בע"מ -
Differential effect of age on metabolisable energy content of high protein-low energy and low protein-high energy diets in young broiler chicks1
Year:
1995
Source of publication :
British Poultry Science
Authors :
ברטוב, עדו
;
.
Volume :
36
Co-Authors:
Bartov, I., Department of Poultry Science, Agricultural Research Organization, The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
631
To page:
643
(
Total pages:
13
)
Abstract:
1. An experiment was carried out with 6-d old male broiler chicks in an attempt to understand better the effect of age on dietary AMEn of high protein-low energy (HPLE) and low protein-high energy (LPHE) diets which are used in the determination of the AMEncontent of grains when substituted for the entire diet. The experiment was carried out in a split-plot design in which the effects of 2 diets (HPLE-reference and LPHE-test, containing maize) on food intake, faecal excretion, dietary AMEn and the utilisation of the nutrients were evaluated in 3 age periods (A = 11–13, B = 15–17 and C = 20—22 d of age). 2. Chicks fed on the HPLE diet consumed significantly less food than those fed on the LPHE diet during periods A and B, but not in G. They also produced a significantly larger amount of droppings during periods B and G. Food-to-droppings ratio, which was consistently and significantly lower in chicks fed on the HPLE diet, decreased markedly in period C only in these birds. 3. Absolute and relative retention (RR) of dry matter (DM) and starch, and RR of nitrogen (N) from birds fed on the HPLE diet, were consistently and significantly lower than from those fed on the LPHE diet, but fat retention (absolute and relative) was higher. RR of DM and of N in period C was significantly lower than in periods A and B, while RR of fat and of starch was not affected by age. The effect of age on RR of N was observed only with the HPLE diet. 4. AMEnof the HPLE diet, but not of the LPHE diet, in period C was significantly lower than in periods A and B, resulting in a significant interaction between age and diet and a general reduction with age. The calculated AMEncontents of the maize in periods A and B were essentially the same (14.91 and 14.85 MJ/kg, respectively), and lower than in period C (15.28 MJ/kg). It is concluded, therefore, that because of its effect on AMEnof the HPLE reference diet in chicks older than 17 d, bird age is of considerable importance in the determination of AMEnin grains when substituted for the entire diet. © 1995, Taylor & Francis Group, LLC. All rights reserved.
Note:
Related Files :
aging
Animal
animal disease
Animals
Chickens
drug effect
Male
metabolism
standard
עוד תגיות
תוכן קשור
More details
DOI :
10.1080/00071669508417808
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
19178
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:27
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Scientific Publication
Differential effect of age on metabolisable energy content of high protein-low energy and low protein-high energy diets in young broiler chicks1
36
Bartov, I., Department of Poultry Science, Agricultural Research Organization, The Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Differential effect of age on metabolisable energy content of high protein-low energy and low protein-high energy diets in young broiler chicks1
1. An experiment was carried out with 6-d old male broiler chicks in an attempt to understand better the effect of age on dietary AMEn of high protein-low energy (HPLE) and low protein-high energy (LPHE) diets which are used in the determination of the AMEncontent of grains when substituted for the entire diet. The experiment was carried out in a split-plot design in which the effects of 2 diets (HPLE-reference and LPHE-test, containing maize) on food intake, faecal excretion, dietary AMEn and the utilisation of the nutrients were evaluated in 3 age periods (A = 11–13, B = 15–17 and C = 20—22 d of age). 2. Chicks fed on the HPLE diet consumed significantly less food than those fed on the LPHE diet during periods A and B, but not in G. They also produced a significantly larger amount of droppings during periods B and G. Food-to-droppings ratio, which was consistently and significantly lower in chicks fed on the HPLE diet, decreased markedly in period C only in these birds. 3. Absolute and relative retention (RR) of dry matter (DM) and starch, and RR of nitrogen (N) from birds fed on the HPLE diet, were consistently and significantly lower than from those fed on the LPHE diet, but fat retention (absolute and relative) was higher. RR of DM and of N in period C was significantly lower than in periods A and B, while RR of fat and of starch was not affected by age. The effect of age on RR of N was observed only with the HPLE diet. 4. AMEnof the HPLE diet, but not of the LPHE diet, in period C was significantly lower than in periods A and B, resulting in a significant interaction between age and diet and a general reduction with age. The calculated AMEncontents of the maize in periods A and B were essentially the same (14.91 and 14.85 MJ/kg, respectively), and lower than in period C (15.28 MJ/kg). It is concluded, therefore, that because of its effect on AMEnof the HPLE reference diet in chicks older than 17 d, bird age is of considerable importance in the determination of AMEnin grains when substituted for the entire diet. © 1995, Taylor & Francis Group, LLC. All rights reserved.
Scientific Publication
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