scholarly journals Milk fat depression induced by dietary marine algae in dairy ewes: Persistency of milk fatty acid composition and animal performance responses

2013 ◽  
Vol 96 (1) ◽  
pp. 524-532 ◽  
Author(s):  
E. Bichi ◽  
G. Hervás ◽  
P.G. Toral ◽  
J.J. Loor ◽  
P. Frutos
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Milk Fat ◽  
Marine Algae ◽  
Milk Fatty Acid ◽  
Animal Performance ◽  
Milk Fat Depression ◽  
Dairy Ewes

Diet-induced milk fat depression: Association with changes in milk fatty acid composition and fluidity of milk fat

2008 ◽  
Vol 115 (2-3) ◽  
pp. 319-331 ◽  
Author(s):  
M.A.S. Gama ◽  
P.C. Garnsworthy ◽  
J.M. Griinari ◽  
P.R. Leme ◽  
P.H.M. Rodrigues ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Milk Fat ◽  
Milk Fatty Acid ◽  
Milk Fat Depression

scholarly journals Temporal changes in milk fatty acid composition during diet-induced milk fat depression in lactating cows

2019 ◽  
Vol 102 (6) ◽  
pp. 5148-5160 ◽  
Author(s):  
H. Leskinen ◽  
L. Ventto ◽  
P. Kairenius ◽  
K.J. Shingfield ◽  
J. Vilkki
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Milk Fat ◽  
Temporal Changes ◽  
Milk Fatty Acid ◽  
Milk Fat Depression ◽  
Lactating Cows

Effect of forage conservation method, concentrate level and propylene glycol on the fatty acid composition and vitamin content of cows' milk

2005 ◽  
Vol 72 (3) ◽  
pp. 349-361 ◽  
Author(s):  
Kevin J Shingfield ◽  
Pirjo Salo-Väänänen ◽  
Eero Pahkala ◽  
Vesa Toivonen ◽  
Seija Jaakkola ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Ascorbic Acid ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Milk Fat ◽  
Milk Fatty Acid ◽  
Vitamin Content ◽  
Concentrate Level ◽  
Conservation Method

Based on potential health benefits, there is a need to develop effective strategies for enhancing milk fat concentrations of cis-9 18[ratio ]1, 18[ratio ]3 n-3 and conjugated linoleic (CLA) content in milk without compromising the sensory or storage characteristics of processed milk or dairy products. Sixteen Finnish Ayrshire dairy cows were used in a cyclic change-over experiment with four 21-d experimental periods and a 4×2×2 factorial arrangement of treatments to evaluate the effects of forage conservation method, concentrate level and supplements of propylene glycol (PG), and their interactions on milk fatty acid composition and vitamin content. Experimental treatments consisted of four conserved forages offered ad libitum, supplemented with two levels of a standard concentrate (7 or 10 kg/d) and PG (0 and 210 g/d) fed as three equal meals. Primary growths of timothy and meadow fescue sward were conserved by ensiling with none (NA), an inoculant enzyme preparation (IE) or a formic acid based (FORM) additive or as hay 1 week later. Conservation of grass by drying rather than ensiling resulted in lower forage 18[ratio ]2n-6, 18[ratio ]3n-3, total fatty acid and fat-soluble vitamin concentrations. In spite of lower intakes, milk fat 18[ratio ]2n-6 and 18[ratio ]3n-3 content was higher (P<0·05) for hay than for silage diets (12·1, 9·6, 9·6 and 9·3 and 5·00, 3·51, 4·27 and 2·93 g/kg total fatty acids, for hay, NA, IE and FORM silages, respectively). Forage conservation method had no clear effects on milk trans 18[ratio ]1 or CLA content. Compared with silage, hay diets resulted in milk containing lower (P<0·001) riboflavin, α-tocopherol and β-carotene concentrations, but had no effect on ascorbic acid, thiamine, pyridoxine or retinol content. Feeding more concentrates had no effect on milk fatty acid composition or milk vitamin content, other than lowering (P<0·001) 16[ratio ]0 concentrations from 348 to 338 g/kg fatty acids. Supplements of PG led to small (P<0·05) increases in milk 13[ratio ]0 anteiso and 15[ratio ]0 content from 1·06 and 11·3 to 1·22 and 12·6 g/kg fatty acids and reduced (P<0·05) the concentrations of ascorbic acid (16·1 v. 15·1 g/kg milk).

The effect of duration of feeding oilseeds to dairy cows on the persistency of response in milk fatty acid composition

2003 ◽  
Vol 2003 ◽  
pp. 22-22
Author(s):  
D. I. Givens ◽  
C. Rymer ◽  
A.R. Moss ◽  
R. Allison
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Dairy Cows ◽  
Acid Composition ◽  
Milk Fat ◽  
Extended Period ◽  
Monounsaturated Fatty Acids ◽  
Milk Fatty Acid ◽  
Human Diet

There is much interest in the manipulation of the fatty acid composition of milk fat so as to improve its health characteristics in the human diet. In an earlier study there was an indication that the concentration of fatty acids in milk may change with time when feeding whole oilseeds rich in polyunsaturated fatty acids (PUFA). In particular a tendency for an increase in CLA and C18:1 and a reduction in C18:2 and C18:3 concentrations with time were seen. The present study was therefore undertaken to examine the changes in the fatty acid composition of milk from high yielding dairy cows fed diets rich in monounsaturated fatty acids (MUFA) or PUFA over an extended period.

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