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פותח על ידי קלירמאש פתרונות בע"מ -
The influence of extruding corn grain in diets fed to Finn × Awassi crossbred ewes during late pregnancy on birth weight of lambs
Year:
1997
Source of publication :
Canadian Journal of Animal Science
Authors :
לנדאו, יאן
;
.
ניצן, צפרירה
;
.
צורף, ציפורה
;
.
Volume :
77
Co-Authors:
Landau, S., Sheep and Goat Department, Extension Service, Ministry of Agriculture, P.O. Box 7054, Hakirya, Tel Aviv 61070, Israel
Zoref, Z., Institute of Animal Science, Agricultural Research Organisation, Bet Dagan, Israel
Nitsan, Z., Institute of Animal Science, Agricultural Research Organisation, Bet Dagan, Israel
Madar, Z., Dept. of Biochem. and Hum. Nutrition, Faculty of Agriculture, Rehovot, Israel
Facilitators :
From page:
141
To page:
147
(
Total pages:
7
)
Abstract:
As part of a program aimed at increasing lamb survival by maximizing lamb birth weight, the relationship between corn starch degradability in late pregnancy diets and lambing performance was studied in 60 Finn - Awassi ewes fed diets supplemented with 500 g d-1 of whole (WC), extruded (EC) or ground corn (GC). Lamb birth-weights ranked as follows: single lambs: EC > WC > GC (NS at 2nd parity, P < 0.10 at 3rd and higher parities); twin lambs: EC > WC = GC (P < 0.02 at 2nd, P < 0.07 at 3rd and higher parities). The ratio between birth weight of twin lamb litters and maternal weight measured 4 d postpartum in ewes at 3rd and higher parities was 25% greater in EC-fed ewes than in their WC-or GC-fed counterparts (P < 0.03). Colostrum accumulation prepartum was not affected by litter size or diet, but was higher (P < 0.04) in ewes from 3rd and higher parities compared with 2nd parity. Plasma NEFA (positive correlation) and insulin (negative correlation) concentrations on day 23 pre-partum, or plasma NEFA (positive correlation), insulin and glucose (negative correlations) concentrations on day 9 pre-partum, and ewe body weight at day 4 post-partum (positive correlation) explained 78% of variance in lamb birth weight (P < 0.0001). In conclusion 1) in prolific ewes at late pregnancy, highly degradable corn starch promotes better fetal growth than moderately degradable corn starch; 2) the positive correlation between NEFA and lamb birth weight, even in "overfed" ewes carrying single lambs indicates that maximal lamb birth weight is not likely to be maximized without some degree of maternal lipolysis.
Note:
Related Files :
Birth Weight
nutrition
pregnancy
Prolificacy
sheep
Starch
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20147
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:34
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Scientific Publication
The influence of extruding corn grain in diets fed to Finn × Awassi crossbred ewes during late pregnancy on birth weight of lambs
77
Landau, S., Sheep and Goat Department, Extension Service, Ministry of Agriculture, P.O. Box 7054, Hakirya, Tel Aviv 61070, Israel
Zoref, Z., Institute of Animal Science, Agricultural Research Organisation, Bet Dagan, Israel
Nitsan, Z., Institute of Animal Science, Agricultural Research Organisation, Bet Dagan, Israel
Madar, Z., Dept. of Biochem. and Hum. Nutrition, Faculty of Agriculture, Rehovot, Israel
The influence of extruding corn grain in diets fed to Finn × Awassi crossbred ewes during late pregnancy on birth weight of lambs
As part of a program aimed at increasing lamb survival by maximizing lamb birth weight, the relationship between corn starch degradability in late pregnancy diets and lambing performance was studied in 60 Finn - Awassi ewes fed diets supplemented with 500 g d-1 of whole (WC), extruded (EC) or ground corn (GC). Lamb birth-weights ranked as follows: single lambs: EC > WC > GC (NS at 2nd parity, P < 0.10 at 3rd and higher parities); twin lambs: EC > WC = GC (P < 0.02 at 2nd, P < 0.07 at 3rd and higher parities). The ratio between birth weight of twin lamb litters and maternal weight measured 4 d postpartum in ewes at 3rd and higher parities was 25% greater in EC-fed ewes than in their WC-or GC-fed counterparts (P < 0.03). Colostrum accumulation prepartum was not affected by litter size or diet, but was higher (P < 0.04) in ewes from 3rd and higher parities compared with 2nd parity. Plasma NEFA (positive correlation) and insulin (negative correlation) concentrations on day 23 pre-partum, or plasma NEFA (positive correlation), insulin and glucose (negative correlations) concentrations on day 9 pre-partum, and ewe body weight at day 4 post-partum (positive correlation) explained 78% of variance in lamb birth weight (P < 0.0001). In conclusion 1) in prolific ewes at late pregnancy, highly degradable corn starch promotes better fetal growth than moderately degradable corn starch; 2) the positive correlation between NEFA and lamb birth weight, even in "overfed" ewes carrying single lambs indicates that maximal lamb birth weight is not likely to be maximized without some degree of maternal lipolysis.
Scientific Publication
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