scholarly journals Effects on milk yield and composition of infusions of volatile fatty acids and caseinate into the digestive tract of dairy cows

1992 ◽  
Vol 41 (1) ◽  
pp. 102-102
Author(s):  
C. Hurtaud ◽  
H. Rulquin ◽  
R. Vérité
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Digestive Tract ◽  
Milk Yield ◽  
Volatile Fatty Acids

Intraruminal administration ofMegasphaera elsdeniimodulated rumen fermentation profile in mid-lactation dairy cows

2011 ◽  
Vol 79 (1) ◽  
pp. 16-25 ◽  
Author(s):  
Qendrim Zebeli ◽  
Sarah J Terrill ◽  
Alberto Mazzolari ◽  
Suzanna M Dunn ◽  
Wen Z Yang ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Milk Yield ◽  
Volatile Fatty Acids ◽  
Rumen Fluid ◽  
Plasma Concentrations ◽  
Rumen Fermentation ◽  
Holstein Cows ◽  
Plasma Metabolites ◽  
Fermentation Profile

This study evaluated the effects of intraruminal administration ofMegasphaera elsdeniion ruminal fermentation patterns, the profile of plasma metabolites, and milk yield and composition of mid-lactation dairy cows. Eight primiparous, ruminally cannulated Holstein cows were arranged in a paired 2×2 crossover design. Cows were randomly assigned to one of two treatments: 1) intraruminal inoculation of 35 ml suspension per day ofM. elsdeniiATCC 25940 (MEGA), containing 108cfu/ml of bacteria, dissolved in 35 ml of saline (0·15m), or 2) carrier alone (35 ml saline; CTR). Both postprandial and preprandial rumen volatile fatty acids (VFA) and plasma metabolite measurements were analysed. Postprandial VFA patterns were affected the most, with butyrate (P<0·01) and valerate (P<0·01) proportions increasing, and acetate (P<0·01), isobutyrate (P=0·05) and isovalerate (P<0·01) decreasing in MEGA cows. Preprandial data measured at various days showed that MEGA dosage tended to increase the molar proportion of propionate (P=0·09) and lower the acetate to propionate ratio (P=0·07) in the rumen fluid. There was no effect of treatment on rumen pH and on the concentration of lactate in the rumen as well as on selected preprandial plasma metabolites. Postprandial plasma concentrations of cholesterol tended to increase (P=0·07) in MEGA cows compared with CTR. Concentrations of non-esterified fatty acids (NEFA) in the plasma were lower in MEGA cows after the morning feeding (P<0·01). Sampling hour also affected plasma NEFA in this study. Plasma β-hydroxybutyrate (BHBA) were not affected by the treatment (P>0·05); however, after the morning feeding BHBA concentration was increased in both groups of cows. Dry matter intake and milk yield and composition were not affected by treatment. In conclusion, results indicate thatM. elsdeniihas the potential to modulate the rumen fermentation profile in mid-lactation Holstein cows, but these effects were only slightly reflected in changes in plasma metabolites and milk composition.

scholarly journals Influence of wet vs. dry by-product ingredients and addition of branched-chain volatile fatty acids and valerate to dairy diets. 2. Rumen fermentation and milk production.

1987 ◽  
Vol 35 (4) ◽  
pp. 447-458
Author(s):  
P.H. Robinson ◽  
S. Tamminga ◽  
A.M. van Vuuren
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Milk Yield ◽  
Volatile Fatty Acids ◽  
Rumen Fermentation ◽  
Maize Silage ◽  
Beet Pulp ◽  
Methyl Butyrate ◽  
Branched Chain ◽  
Gluten Feed

Four dairy cows with large rumen cannulae were fed totally mixed diets twice daily. Diets contained equal amounts of hay crop silage and maize silage to a total of about 43% of DM intake. About 35% of DM intake was derived from the by-product ingredients maize gluten feed, beet pulp, and brewers' grains, and the balance was mixed ingredients. Diets were formulated to contain either wet (WET) or dry (DRY) by-product ingredients with (PLUS) or without (MINUS) a supplement containing isobutyrate, 2-methyl butyrate, 3-methyl butyrate, and valerate. Measurements were made from wk 12 to 28 of lactation to determine effects of treatments on feed intake, parameters of rumen fermentation, and milk yield and composition. Milk yield and composition were not influenced by treatments. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Dose Response of Dairy Cows to Ammonium Salts of Volatile Fatty Acids

1990 ◽  
Vol 73 (8) ◽  
pp. 2168-2178 ◽  
Author(s):  
D.E. Otterby ◽  
D.G. Johnson ◽  
R. Towns ◽  
R.M. Cook ◽  
R.A. Erdman ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Dose Response ◽  
Volatile Fatty Acids ◽  
Ammonium Salts

Effects of protected vegetable fats on rumen metabolism and productivity dairy cows

2021 ◽  
Vol 1 (9) ◽  
pp. 68-74
Author(s):  
A. V. Golovin ◽  
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Dry Matter ◽  
Volatile Fatty Acids ◽  
Metabolic Energy ◽  
Black And White ◽  
Rumen Metabolism ◽  
Economic Experiment ◽  
Feed Costs

In a scientific economic experiment conducted in the experimental farm «Klenovo-Chegodaevo» (Moscow) on three groups of Holsteinized black-and-white cows with a milk yield of 7000 kg of milk per lactation, 10 heads in each, it was found that the inclusion in the diet of cows of the experimental groups tested protected fats (hydrogenated and fractionated) in the amount of 300 g per head per day, contributed to the tendency for more intensive metabolic processes in the rumen due to a slight increase in the concentration of volatile fatty acids by 5,6–7,4% and an increase in the mass of microorganisms in the contents of the rumen by 5,4–14,4% (P≥0,05). At the same time, an increase in the concentration of metabolic energy in the dry matter of the cows ration from 10,7 to 11,0 MJ / kg in the period from 21 to 120 days of lactation, due to the inclusion of protected fats in the diet of cows from the experimental groups, contributed to an increase in milk yield 4% fat content for 100 days of the experiment by 9,7% and 11,0% (P≤0,05), compared with the control, as well as the production of milk fat and protein, respectively by 9,6–11,0% (P≤0,05 in the second case) and 7,4–8,3%, feed costs expressed in ME decreased by 4,9–5,2%.

scholarly journals The Mode of Grass Supply to Dairy Cows Impacts on Fatty Acid and Antioxidant Profile of Milk

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1256
Author(s):  
Senén De La Torre-Santos ◽  
Luis J. Royo ◽  
Adela Martínez-Fernández ◽  
Cristina Chocarro ◽  
Fernando Vicente
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Unsaturated Fatty Acids ◽  
Major Influence ◽  
Grass Silage ◽  
Zero Grazing

The optimization of milk production includes a rational use of forages, respect for the environment and offers the best quality to consumers. Milk production based on grass and forages produces healthier milk and it is widely spread throughout the Atlantic arc to maximize milk yield per hectare. However, the mode of offering the grass can have a major influence on milk composition. The aim of this study was to evaluate the effect of grass supply mode (grazing, zero-grazing or ensiling) on dairy cows’ performance, with particular reference to fatty acids and fat-soluble antioxidants concentration. A three by three Latin square experiment was performed with 18 dairy cows. Experimental treatments consisted of exclusive feeding with grass silage and zero-grazing, both offered ad libitum indoors, or grazing for 24 h. The results showed that grazing cows had a higher dry matter intake and greater milk yield than cows feeding on grass silage and zero-grazing, as well as higher concentrations of protein, lactose, nonfat-solids and urea in milk than housed cows. Milk fat from grazing cows had a higher proportion of unsaturated fatty acids than from cows feeding on grass silage and zero-grazing, with significant differences in the proportion of vaccenic and rumenic acids. The 18:1 trans-11 to 18:1 trans-10 ratio is proposed as biomarker to identify the milk produced from the management system of grazing cattle. Milk from grazing cows had a greater proportion of lutein than cows eating grass silage, with the zero-grazing system having intermediate values. In conclusion, the mode of grass supply affects fatty acid and antioxidant profiles of milk.

scholarly journals Effects of Extruded Linseed and Soybean Dietary Supplementation on Lactation Performance, First-Service Conception Rate, and Mastitis Incidence in Holstein Dairy Cows

Animals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 436
Author(s):  
Ahmed Dawod ◽  
Hamada Ahmed ◽  
Reham Abou-Elkhair ◽  
Hamed T. Elbaz ◽  
Ayman E. Taha ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Milk Yield ◽  
Unsaturated Fatty Acids ◽  
Saturated Fatty Acids ◽  
Dietary Supplementation ◽  
Basal Diet ◽  
Conception Rate ◽  
Service Conception ◽  
Holstein Dairy Cows

This study quantifies the effects of extruded linseed and soybean (ELS) dietary supplementation on milk yield, composition, and fatty acid profiles, as well as first-service conception rate in Holstein dairy cows. Seventy-eight open Holstein dairy cows were divided into two groups: (1) a control, which received a basal diet; and (2) a test group, which received a basal diet supplemented with the ELS (650 g/kg of extruded linseed and 150 g/kg of extruded soybean) at a rate of 100 g/kg. In the ELS group, milk yield per day and solid not fat (SNF) yield increased by 3.26% and 0.88%, respectively, in relation to the control. Percentage milk fat decreased significantly by 1.4% in the ELS group when compared with the control. The ELS supplement resulted in a decrease in saturated fatty acids (SFAs) and an increase in monounsaturated (MUFAs) and polyunsaturated fatty acids (PUFAs) in milk. In conclusion, the supplementation of dairy cow feed with 100 g/kg of ELS increases milk yield and milk unsaturated fatty acids (especially MUFAs and PUFAs). ELS supplementation also causes a decrease in percentage fat and SFA levels but does not affect the first-service conception rate or the incidence rate of mastitis.

Effect of dietary fish oil on milk yield, fatty acids content and serum metabolic profile in dairy cows

2010 ◽  
Vol 95 (4) ◽  
pp. 512-522 ◽  
Author(s):  
R. Kupczyński ◽  
M. Szołtysik ◽  
W. Janeczek ◽  
J. Chrzanowska ◽  
S. Kinal ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fish Oil ◽  
Dairy Cows ◽  
Milk Yield ◽  
Metabolic Profile ◽  
Dietary Fish
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