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פותח על ידי קלירמאש פתרונות בע"מ -
The effects of extruded flaxseed supplementation to high-yielding dairy cows on milk production and milk fatty acid composition
Year:
2009
Source of publication :
Animal Feed Science and Technology
Authors :
מועלם, עוזי
;
.
Volume :
152
Co-Authors:
Moallem, U., Department of Dairy Cattle, Institute of Animal Sciences, the Volcani Center, P.O. Box 6, Bet-Dagan, 50250, Israel
Facilitators :
From page:
232
To page:
242
(
Total pages:
11
)
Abstract:
The objectives of this study were to determine the effects of extruded flaxseed supplementation to high-yielding dairy cows on milk yield and fatty acid profile. One-hundred Israeli-Holstein dairy cows averaging 150 days in milk (DIM) were stratified into two treatment groups on the basis of milk production, DIM and parity. The treatments were: (1) control-cows were fed a lactating-cows diet; and (2) extruded flaxseed (EF)-cows were fed a lactating-cows diet which included an extruded supplement at 40 g/kg dry matter (DM) that contained flaxseed and wheat bran at 700 and 300 g/kg, respectively. The average daily milk yield was 2.7% higher in the EF group than in the control group (45.4 and 44.2 kg/d, respectively; P<0.0001), the fat content was lower in the EF group (34.1 and 36.3 g/kg, respectively; P<0.03), and fat yield was unaffected. The α-linolenic acid (ALA; C18:3 n-3) in milk fat was 3.1 times, eicosapentaenoic acid (EPA; C20:5 n-3) 2.4 times, and docosapentaenoic acid (DPA; C22:5 n-3) twice as high in the EF group as in the control group (P<0.0001). The overall n-3 fatty acids (FA) concentration and yields were 2.8 times as great in the EF group as in the control group (10.9 and 3.9 g/kg and 16.7 and 6.0 g/d, respectively; P<0.0001). The saturated FA (SFA) content in milk fat was 36 g/kg lower in the EF group than in the control (622 and 658 g/kg of FA; P<0.0001). On the average, the EF increased the proportion of mono-unsaturated FA (MUFA) by 10% and polyunsaturated FA (PUFA) by 11.8% compared with the control. The n-6:n-3 FA ratio was decreased by the EF supplementation from 11.9 in the control group to 4.2 in the EF group (P<0.0001). In conclusion, feeding an extruded supplement containing 700 g/kg of EF, at a DM rate of 40 g/kg, increased the milk yield and decreased the fat percentage. The n-3 FA concentration and yield in milk fat were 2.8 times as high and the n-6:n-3 ratio was 2.8 times lower in the EF group than in the controls. The SFA proportion decreased and the MUFA and PUFA proportions increased in response to EF supplementation. © 2009 Elsevier B.V. All rights reserved.
Note:
Related Files :
Bos
Dairy cows
Extruded flaxseed
n-3 fatty acids
Triticum aestivum
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.anifeedsci.2009.04.018
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24839
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:10
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Scientific Publication
The effects of extruded flaxseed supplementation to high-yielding dairy cows on milk production and milk fatty acid composition
152
Moallem, U., Department of Dairy Cattle, Institute of Animal Sciences, the Volcani Center, P.O. Box 6, Bet-Dagan, 50250, Israel
The effects of extruded flaxseed supplementation to high-yielding dairy cows on milk production and milk fatty acid composition
The objectives of this study were to determine the effects of extruded flaxseed supplementation to high-yielding dairy cows on milk yield and fatty acid profile. One-hundred Israeli-Holstein dairy cows averaging 150 days in milk (DIM) were stratified into two treatment groups on the basis of milk production, DIM and parity. The treatments were: (1) control-cows were fed a lactating-cows diet; and (2) extruded flaxseed (EF)-cows were fed a lactating-cows diet which included an extruded supplement at 40 g/kg dry matter (DM) that contained flaxseed and wheat bran at 700 and 300 g/kg, respectively. The average daily milk yield was 2.7% higher in the EF group than in the control group (45.4 and 44.2 kg/d, respectively; P<0.0001), the fat content was lower in the EF group (34.1 and 36.3 g/kg, respectively; P<0.03), and fat yield was unaffected. The α-linolenic acid (ALA; C18:3 n-3) in milk fat was 3.1 times, eicosapentaenoic acid (EPA; C20:5 n-3) 2.4 times, and docosapentaenoic acid (DPA; C22:5 n-3) twice as high in the EF group as in the control group (P<0.0001). The overall n-3 fatty acids (FA) concentration and yields were 2.8 times as great in the EF group as in the control group (10.9 and 3.9 g/kg and 16.7 and 6.0 g/d, respectively; P<0.0001). The saturated FA (SFA) content in milk fat was 36 g/kg lower in the EF group than in the control (622 and 658 g/kg of FA; P<0.0001). On the average, the EF increased the proportion of mono-unsaturated FA (MUFA) by 10% and polyunsaturated FA (PUFA) by 11.8% compared with the control. The n-6:n-3 FA ratio was decreased by the EF supplementation from 11.9 in the control group to 4.2 in the EF group (P<0.0001). In conclusion, feeding an extruded supplement containing 700 g/kg of EF, at a DM rate of 40 g/kg, increased the milk yield and decreased the fat percentage. The n-3 FA concentration and yield in milk fat were 2.8 times as high and the n-6:n-3 ratio was 2.8 times lower in the EF group than in the controls. The SFA proportion decreased and the MUFA and PUFA proportions increased in response to EF supplementation. © 2009 Elsevier B.V. All rights reserved.
Scientific Publication
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