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פותח על ידי קלירמאש פתרונות בע"מ -
Responses of laying hens to forced molt procedures of variable length with or without light restriction.
Year:
1995
Source of publication :
Poultry Science
Authors :
הורביץ, שמואל
;
.
וקס, אליהו
;
.
ניסנבאום, יהודית
;
.
פלבניק, יצחק
;
.
Volume :
74
Co-Authors:
Hurwitz, S., Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Wax, E., Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Nisenbaum, Y., Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Plavnik, I., Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Facilitators :
From page:
1745
To page:
1753
(
Total pages:
9
)
Abstract:
The importance of the length of the rest period and of photoperiod as components of the forced molt procedures was evaluated in 650- and 560-d-old Lohman hens. The procedure included an 8-d feed withdrawal phase and rest periods varying from 0 to 35 d, during which the birds were fed for maintenance only. In the first trial, forced molt was applied with or without omission of artificial illumination. The rest period varied between 2 and 20 d. In the second trial, all treatments included omission of artificial illumination, and a variable rest period between 0 and 35 d. Egg production ceased, after 4 to 5 d of feed withdrawal and resumed 8 to 15 d after the end of the rest period, without any consistent response to its length. Forced molt stimulated egg production rate and diminished its age-dependent rate of decline, reduced the proportion of broken and shell-less eggs, and improved shell quality. Following wide oscillations proportional to the length of the rest period, egg weight stabilized at levels similar to that of the unmolted controls. Feed intake was stimulated by forced molt to levels exceeding those of the control hens. Body weight increased during the postmolt period to levels slightly exceeding those of unmolted controls. Results of one trial show that omission of artificial illumination was essential for the full expression of the molt responses. In the other trial, production rate and shell quality were improved and the percentage of broken eggs was reduced when the length of the rest period was increased. Maximal improvements appears to have been reached with rests period of 14 to 21 d.
Note:
Related Files :
Animal
Animals
article
body weight
chicken
Chickens
eating
egg
Female
photoperiodicity
standard
time
Time Factors
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27958
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:35
Scientific Publication
Responses of laying hens to forced molt procedures of variable length with or without light restriction.
74
Hurwitz, S., Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Wax, E., Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Nisenbaum, Y., Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Plavnik, I., Institute of Animal Science, Volcani Center, Bet Dagan, Israel.
Responses of laying hens to forced molt procedures of variable length with or without light restriction.
The importance of the length of the rest period and of photoperiod as components of the forced molt procedures was evaluated in 650- and 560-d-old Lohman hens. The procedure included an 8-d feed withdrawal phase and rest periods varying from 0 to 35 d, during which the birds were fed for maintenance only. In the first trial, forced molt was applied with or without omission of artificial illumination. The rest period varied between 2 and 20 d. In the second trial, all treatments included omission of artificial illumination, and a variable rest period between 0 and 35 d. Egg production ceased, after 4 to 5 d of feed withdrawal and resumed 8 to 15 d after the end of the rest period, without any consistent response to its length. Forced molt stimulated egg production rate and diminished its age-dependent rate of decline, reduced the proportion of broken and shell-less eggs, and improved shell quality. Following wide oscillations proportional to the length of the rest period, egg weight stabilized at levels similar to that of the unmolted controls. Feed intake was stimulated by forced molt to levels exceeding those of the control hens. Body weight increased during the postmolt period to levels slightly exceeding those of unmolted controls. Results of one trial show that omission of artificial illumination was essential for the full expression of the molt responses. In the other trial, production rate and shell quality were improved and the percentage of broken eggs was reduced when the length of the rest period was increased. Maximal improvements appears to have been reached with rests period of 14 to 21 d.
Scientific Publication
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