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פותח על ידי קלירמאש פתרונות בע"מ -
Flushing with soybean meal can improve reproductive performances in lactating Sarda ewes on a mature pasture
Year:
1997
Source of publication :
Small Ruminant Research
Authors :
לנדאו, יאן
;
.
Volume :
24
Co-Authors:
Molle, G., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Landau, S., Department of Natural Resources, Institute of Field and Garden Crops, Agricultural Research Organization, 50250 Bet Dagan, Israel
Branca, A., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Sitzia, M., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Fois, N., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Ligios, S., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Casu, S., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Facilitators :
From page:
157
To page:
165
(
Total pages:
9
)
Abstract:
The effect of different flushing techniques on reproductive performance in Sarda ewes mated while grazing a mature pasture of Italian ryegrass (herbage allowance, 2700 g DM per head per day) was assessed. Sixty adult ewes were allotted to four groups (n= 15). Estrus of ewes in the control group (C) was synchronised, using the ram effect and progesterone administration, but they received no dietary supplement before the introduction of intact rams. Ewes in the other groups were offered a supplement of soybean-meal (SBM), from Day 7 before, through day of ram introduction (short-term flushing, SF); from Day 14 before, through Day 2 after entire ram introduction (medium-term flushing, MF); or from Day 14 before, through Day 21 after ram introduction (long-term flushing, LF). Estrus was not synchronised in the LF group. The amount of SBM offered was 270 g day-1, but actual average intake was 180-210 g day-1. Synchronisation did not affect date of first observed estrus. Flushing resulted in greater ovulation rate (OR) than C: 1.70, compared with 1.29 CL per ewe ovulating, (P < 0.03) and OR was greater in MF than in control ewes (1.80 vs. 1.29 CL per ewe ovulating, P < 0.01). The ovulation rates in the SF and LF groups (1.70 and 1.57 CL per ewe ovulating) did not differ from C and MF. Prolificacy subsequent to the first estrus tended to be increased by flushing (1.66 vs. 1.36, P < 0.15). Fecundity (number of lambs born per ewe exposed, after 34 days with intact rams) ranked MF > LF > SF > C, and tended to differ between MF and C (1.60 vs. 1.14, P < 0.13). Flushing did not result in higher intake of energy or crude protein, because intake of pasture was decreased in flushed ewes, but was related to greater (P < 0.03) intake of digestible protein in the pre-mating period. Under current market conditions, medium-term flushing can be profitable for Sardinian sheep farmers. © 1997 Elsevier Science B.V.
Note:
Related Files :
grazing management
nutrition
ovulation
Reproduction
sheep
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23408
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:59
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Scientific Publication
Flushing with soybean meal can improve reproductive performances in lactating Sarda ewes on a mature pasture
24
Molle, G., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Landau, S., Department of Natural Resources, Institute of Field and Garden Crops, Agricultural Research Organization, 50250 Bet Dagan, Israel
Branca, A., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Sitzia, M., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Fois, N., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Ligios, S., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Casu, S., Ist. Zootecnico Caseario Sardegna, 07040 Olmedo, Italy
Flushing with soybean meal can improve reproductive performances in lactating Sarda ewes on a mature pasture
The effect of different flushing techniques on reproductive performance in Sarda ewes mated while grazing a mature pasture of Italian ryegrass (herbage allowance, 2700 g DM per head per day) was assessed. Sixty adult ewes were allotted to four groups (n= 15). Estrus of ewes in the control group (C) was synchronised, using the ram effect and progesterone administration, but they received no dietary supplement before the introduction of intact rams. Ewes in the other groups were offered a supplement of soybean-meal (SBM), from Day 7 before, through day of ram introduction (short-term flushing, SF); from Day 14 before, through Day 2 after entire ram introduction (medium-term flushing, MF); or from Day 14 before, through Day 21 after ram introduction (long-term flushing, LF). Estrus was not synchronised in the LF group. The amount of SBM offered was 270 g day-1, but actual average intake was 180-210 g day-1. Synchronisation did not affect date of first observed estrus. Flushing resulted in greater ovulation rate (OR) than C: 1.70, compared with 1.29 CL per ewe ovulating, (P < 0.03) and OR was greater in MF than in control ewes (1.80 vs. 1.29 CL per ewe ovulating, P < 0.01). The ovulation rates in the SF and LF groups (1.70 and 1.57 CL per ewe ovulating) did not differ from C and MF. Prolificacy subsequent to the first estrus tended to be increased by flushing (1.66 vs. 1.36, P < 0.15). Fecundity (number of lambs born per ewe exposed, after 34 days with intact rams) ranked MF > LF > SF > C, and tended to differ between MF and C (1.60 vs. 1.14, P < 0.13). Flushing did not result in higher intake of energy or crude protein, because intake of pasture was decreased in flushed ewes, but was related to greater (P < 0.03) intake of digestible protein in the pre-mating period. Under current market conditions, medium-term flushing can be profitable for Sardinian sheep farmers. © 1997 Elsevier Science B.V.
Scientific Publication
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