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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Intake, growth and carcass characteristics of young ostriches given concentrates with and without pasture
Year:
2002
Source of publication :
Animal Science
Authors :
ברקאי, דניאל
;
.
לנדאו, יאן
;
.
ניצן, צפרירה
;
.
ניצן, רונית
;
.
Volume :
74
Co-Authors:
Nitzan, R., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Barkai, D., Department of Natural Resources, Gilat Experimental Station, Mobile Post Negev 2, 85200, Israel
Nitsan, Z., Department of Poultry Science, Institute of Animal Science, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Landau, S., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
71
To page:
79
(
Total pages:
9
)
Abstract:
Although ostriches are herbivores, their diets in commercial farming in Israel consist mainly of concentrates. The objective of this study was to evaluate an alternative for fattening ostriches aged 10 to 30 weeks, which combines pasture with concentrate feeding. Chicks were allotted to three treatments. Diet of group C40 consisted of concentrate only, provided at 40 g/kg body mass (mb). Groups CG20 and CG30 received concentrate at 20 and 30 g/kg mb, respectively, and grazed 4 to 6 h/day on lush green alfalfa (Medicago sativa), sown barley (Hordeum vulgare), natural pasture or sulla (Hedysarum coronarium). During the last 10 weeks of experiment, groups CG20 and CG30 were merged into one group, managed as CG20 and grazed natural pasture, sulla, alfalfa, or vetch (Vicia sativa). Ostriches from group CG20 and CG30 consumed 390 (s.e. 30) g and 260 (s.e. 20) g DM per day at pasture, i.e. 0.46 and 0.28 of their total daily intake, respectively. Pasture intake for CG20 was higher (P < 0.05) than for CG30. Intake of pasture (both grazing treatments combined) was twice as much as on natural pasture or alfalfa as on barley. These results were consistent with the ostriches' preference for forbs rather than grasses in the natural pasture. The mean organic matter digestibility was 0.84 (s.e. 0.01), ostriches gained at 347 (s.e. 13) g/day, and the food conversion ratio was 3.05 (s.e. 0.16), with no effect of group. Also, grazing did not affect the dressing rate (0.47, s.e. 0.015) or the size and mass of the different parts of the gastro-intestinal tract, with the exception of the glandular and muscular stomachs, which were proportionately 0.4 (P < 0.05) heavier in grazing birds. Lower (P < 0.05) fat content (33.8 v. 26.5 g/kg) but not tenderness, of a selected muscle (fibularis longus) was found for grazing birds. This study suggests that, in young ostriches, grazing lush green pasture may reduce concentrate intake by proportionately 0.4, without altering growth performance or carcass yield and quality.
Note:
Related Files :
Concentrates
Grazing
Growth
Hordeum
Medicago sativa
ostriches
Vicia
Vicia sativa
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
21398
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:43
You may also be interested in
Scientific Publication
Intake, growth and carcass characteristics of young ostriches given concentrates with and without pasture
74
Nitzan, R., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Barkai, D., Department of Natural Resources, Gilat Experimental Station, Mobile Post Negev 2, 85200, Israel
Nitsan, Z., Department of Poultry Science, Institute of Animal Science, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Landau, S., Department of Natural Resources, Institute of Field and Garden Crops, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Intake, growth and carcass characteristics of young ostriches given concentrates with and without pasture
Although ostriches are herbivores, their diets in commercial farming in Israel consist mainly of concentrates. The objective of this study was to evaluate an alternative for fattening ostriches aged 10 to 30 weeks, which combines pasture with concentrate feeding. Chicks were allotted to three treatments. Diet of group C40 consisted of concentrate only, provided at 40 g/kg body mass (mb). Groups CG20 and CG30 received concentrate at 20 and 30 g/kg mb, respectively, and grazed 4 to 6 h/day on lush green alfalfa (Medicago sativa), sown barley (Hordeum vulgare), natural pasture or sulla (Hedysarum coronarium). During the last 10 weeks of experiment, groups CG20 and CG30 were merged into one group, managed as CG20 and grazed natural pasture, sulla, alfalfa, or vetch (Vicia sativa). Ostriches from group CG20 and CG30 consumed 390 (s.e. 30) g and 260 (s.e. 20) g DM per day at pasture, i.e. 0.46 and 0.28 of their total daily intake, respectively. Pasture intake for CG20 was higher (P < 0.05) than for CG30. Intake of pasture (both grazing treatments combined) was twice as much as on natural pasture or alfalfa as on barley. These results were consistent with the ostriches' preference for forbs rather than grasses in the natural pasture. The mean organic matter digestibility was 0.84 (s.e. 0.01), ostriches gained at 347 (s.e. 13) g/day, and the food conversion ratio was 3.05 (s.e. 0.16), with no effect of group. Also, grazing did not affect the dressing rate (0.47, s.e. 0.015) or the size and mass of the different parts of the gastro-intestinal tract, with the exception of the glandular and muscular stomachs, which were proportionately 0.4 (P < 0.05) heavier in grazing birds. Lower (P < 0.05) fat content (33.8 v. 26.5 g/kg) but not tenderness, of a selected muscle (fibularis longus) was found for grazing birds. This study suggests that, in young ostriches, grazing lush green pasture may reduce concentrate intake by proportionately 0.4, without altering growth performance or carcass yield and quality.
Scientific Publication
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