Milk production and fatty acid profile of milkfat by dairy cows fed a winter oats (Avena sativaL.) pasture only or a total mixed ration

Grazing cows could produce milk with a higher proportion of polyunsaturated fatty acids, which is beneficial to human health, compared with non-grazing cows, though grazing alone could compromise milk production. Under oceanic climate conditions, a study involving 15 dairy cows, fed total mixed ration (TMR) ad libitum in combination with different grazing times of 12 h (TMR12), 6 h (TMR06) and zero grazing time (TMR00) with the aim to evaluate different strategies on the fatty acids profile of milk and milk production. No differences were seen between the treatments with respect to milk yield (34·4±6·3 kg/d) or milk protein content (30·4±1·8 g/kg). The milk produced by the TMR12 cows had less total fat (36·2 vs. 38·2 g/kg) and saturated fatty acid (FA, 69·39 vs. 71·44 g/100 g FA) than that produced by the TMR00 cows. The concentration of vaccenic acid in the TMR06 and TMR12 milk was twice that of the TMR00 milk (4·22, 4·09 and 2·26 g/100 g FA respectively). Linear increases in conjugated linoleic (CLA) and linolenic acids were observed with increasing grazing time. Pasture was an important source of FA especially C18:3 for TMR06 and TMR12 cows. Under oceanic climatic conditions, the grazing of dairy cows as a complement to feeding with TMR can improve the FA profile of milk and increase its CLA content.

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Effect of dietary inclusion of date seed (Phoenix dactylifera L.) on intake, digestibility, milk production, and milk fatty acid profile of Holstein dairy cows

Tropical Animal Health and Production ◽

10.1007/s11250-018-1576-9 ◽

2018 ◽

Vol 50 (7) ◽

pp. 1427-1433

Author(s):

A. Rezaeenia ◽

A. A. Naserian ◽

R. Valizadeh ◽

A. M. Tahmasbi ◽

A. Mokhtarpour

Keyword(s):

Fatty Acid ◽

Dairy Cows ◽

Fatty Acid Profile ◽

Milk Production ◽

Phoenix Dactylifera ◽

Milk Fatty Acid ◽

Date Seed ◽

Phoenix Dactylifera L ◽

Holstein Dairy Cows

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Abomasal or ruminal administration of flax oil and hulls on milk production, digestibility, and milk fatty acid profile of dairy cows

Journal of Dairy Science ◽

10.3168/jds.2010-3219 ◽

2010 ◽

Vol 93 (10) ◽

pp. 4781-4790 ◽

Cited By ~ 19

Author(s):

R. Kazama ◽

C. Côrtes ◽

D. da Silva-Kazama ◽

N. Gagnon ◽

C. Benchaar ◽

...

Keyword(s):

Fatty Acid ◽

Dairy Cows ◽

Fatty Acid Profile ◽

Milk Production ◽

Milk Fatty Acid ◽

Flax Oil

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Milk production and composition, milk fatty acid profile, and blood composition of dairy cows fed different proportions of whole flaxseed in the first half of lactation

Animal Feed Science and Technology ◽

10.1016/j.anifeedsci.2015.04.009 ◽

2015 ◽

Vol 205 ◽

pp. 23-30 ◽

Cited By ~ 7

Author(s):

H.V. Petit

Keyword(s):

Fatty Acid ◽

Dairy Cows ◽

Fatty Acid Profile ◽

Milk Production ◽

Milk Fatty Acid ◽

Blood Composition

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Effect of total mixed ration composition and daily grazing pattern on milk production, composition and fatty acids profile of dairy cows

Journal of Dairy Research ◽

10.1017/s0022029914000399 ◽

2014 ◽

Vol 81 (4) ◽

pp. 471-478 ◽

Cited By ~ 5

Author(s):

Martha Hernández-Ortega ◽

Adela Martínez-Fernández ◽

Ana Soldado ◽

Amelia González ◽

Carlos M. Arriaga-Jordán ◽

...

Keyword(s):

Fatty Acid ◽

Dairy Cows ◽

Milk Production ◽

Milk Yield ◽

Time Of Day ◽

Italian Ryegrass ◽

Night Time ◽

Total Mixed Ration ◽

Silage Maize ◽

Fatty Acids Profile

The possibilities of using high quality pastures in conjunction with total mixed ration (TMR) during the grazing season have been examined. An experiment with sixteen Holstein cows blocked and randomly assigned to four treatments in a factorial arrangement was conducted in order to evaluate the influence of grazing time of day (day or night) and type of silage (maize or Italian ryegrass) included in the TMR of dairy cows grazing 12 h daily on milk yield, composition and fatty acid profile. The silage type had no effect on the dry matter intake, milk yield and fat and protein proportions. However, cows grazing during the night ate more grass than cows grazing during the day (8·53 vs. 5·65 kg DM/d; P<0·05). No differences were seen between grazing-time with respect to milk production, fat and protein contents. However, the proportion of polyunsaturated fatty acid was higher in milk of dairy cows grazing at night-time than grazing at day-time, especially 18:2n-6 (2·37 vs. 2·12 g/100 g FA respectively, P<0·05) and 18:2cis9trans11 (2·08 vs. 1·74 g/100 g FA respectively, P<0·05).

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