Yield and composition of milk from lactating mares: effect of body condition at foaling

1993 ◽  
Vol 60 (4) ◽  
pp. 457-466 ◽  
Author(s):  
Michel Doreau ◽  
Sylviane Boulot ◽  
Yves Chilliard
Keyword(s):  
Fatty Acids ◽  
Milk Yield ◽  
Body Condition ◽  
Milk Fat ◽  
Post Partum ◽  
Fat Content ◽  
Lipid Mobilization ◽  
Medium Chain ◽  
Medium Chain Fatty Acids ◽  
Esterified Fatty Acids

SummaryThe yield and composition of milk from nursing mares were studied during the first 2 months of lactation in two groups of six and five saddle mares respectively made thin or fat before foaling, then fed ad lib. post partum. Milk yield did not significantly vary with body condition (16·5 and 15·4 kg/d for fat and thin mares respectively). Milk from fat mares had a higher fat content than milk from thin mares; the reverse was found for protein. The composition of milk fat was modified: milk of fat mares was poorer in short- and medium-chain fatty acids (C8-C14). Milk fat output was affected by body condition: 252 and 187 g/d for fat and thin mares respectively. This can be explained by a difference in lipid mobilization, as shown by variations in non-esterified fatty acids.

Changes in blood glucose and plasma non-esterified fatty acids (NEFA) in relation to body condition scores in periparturient purebred Sahiwal cows

2018 ◽  
Author(s):  
V.N. Khune ◽  
Sharad Mishra ◽  
M.D. Bobade ◽  
V. Bhagat ◽  
Nishma Singh
Keyword(s):  
Fatty Acids ◽  
Blood Glucose ◽  
Body Condition ◽  
Transition Period ◽  
Post Partum ◽  
Nefa Concentration ◽  
Plasma Nefa ◽  
Esterified Fatty Acids ◽  
Sahiwal Cows ◽  
Body Condition Scores

The blood glucose and the plasma non-esterified fatty acids (NEFA) were estimated during extended transition period (56 days prepartum to 84 days postpartum) in relation to body condition scores in 26 purebred Sahiwal cows, 13 cows each from two farms i.e. the BMEF and CBF, Anjora, Durg, Chhattisgarh. BMEF herd concentrate was not fed to the animals during prepartum stage. In BMEF, the mean BCS at periodical intervals was significantly less than that of CBF herd throughout the transition period. The postpartum mean unit loss in BCS of the cows of BMEF herd (0.54±0.09) was significantly higher than that of CBF cows (0.52±0.09). The unit change in BCS was higher in magnitude till 42 days post partum in the cows of BMEF whereas it was lower in the cows of CBF. Non significantly higher mean blood glucose concentration was observed in the cows of BMEF (61.46±16 mg/dl) than the cows of CBF. The blood glucose level in both the herds was lower than as fore set range. The post partum mean NEFA concentration (0.138±0.015 mM/l) were significantly (P less than 0.01) higher than prepartum mean NEFA concentration (0.089±0.11mM/l) in BMEF cows however in CBF cows it remained same and differed non significantly. The overall mean plasma NEFA concentration in BMEF (0.116±0.010 mM/l) were significantly (P less than 0.01) higher than those of CBF (0.050±0.005 mM/l). In the cows of BMEF, NEFA value was higher than that of CBF and hence indicated a trend of reduction in BCS after calving. During prepartum period in BMEF and CBF cows, blodd glucose and plasma NEFA were negatively (with low “r”) correlated with BCS.

Changes in the concentration of metabolites in milk from cows fed on diets supplemented with soyabean oil or fatty acids

1989 ◽  
Vol 56 (2) ◽  
pp. 179-183 ◽  
Author(s):  
Anne Faulkner ◽  
Helen T. Pollock
Keyword(s):  
Fatty Acids ◽  
Milk Yield ◽  
Polyunsaturated Fat ◽  
Medium Chain ◽  
Medium Chain Fatty Acids ◽  
Chain Fatty Acids

SummaryCows were fed on diets supplemented with soyabean oil or soyabean fatty acids which in some cases were protected from rumen hydrogenation. The fat-containing diets reduced the output of short- and medium-chain fatty acids in milk. Associated with this fall in short- and medium-chain fatty acids was a decrease in the concentration of 2-oxoglutarate and an increase in that of isocitrate and citrate. Protection of polyunsaturated fat from rumen hydrogenation had no significant effect. Milk yields were unaffected by diet, but the variation in milk yield among cows correlated positively with the concentration of glucose in milk.

scholarly journals  Changes in the composition of goat colostrum and milk fatty acids during the first month of lactation

2012 ◽  
Vol 57 (No. 1) ◽  
pp. 28-33 ◽  
Author(s):  
M. Marounek ◽  
L. Pavlata ◽  
L. Mišurová ◽  
Z. Volek ◽  
R. Dvořák
Keyword(s):  
Fatty Acids ◽  
Milk Fat ◽  
Post Partum ◽  
Microbial Pathogens ◽  
Mature Milk ◽  
Milk Fatty Acids ◽  
Medium Chain ◽  
Winter Diet

Changes in the composition of colostrum and milk fatty acids during the first month of lactation of ten 3-years-old White shorthaired goats fed a winter diet were investigated. Thirty-eight fatty acids (FAs) were identified in the milk fat. Saturated FAs accounted for 67.0% of the total determined FAs in colostrum and 62% at 30 days post partum. Monounsaturated FAs made up 28.2% of the total FAs in colostrum and increased with the progress of lactation at the expense of saturated FAs. The percentage of polyunsaturated FAs varied from 4.4 to 4.8%. The major FAs in colostrum and milk were palmitic and oleic acids, followed by stearic and myristic acids (30.1, 25.3, 11.8, 11.4% and 23.6, 30.3, 13.6, 8.6% in colostrum and milk 30 days post partum, respectively). The levels of palmitic and myristic acids in colostrum were higher than in mature milk, whereas the levels of capric, stearic and oleic acids were lower. The medium-chain FA (caprylic, capric, lauric) content increased from 8.7% of FAs in colostrum to 11.1% on the fourth day of lactation. These acids are efficient antimicrobials, thus may contribute to the protection of young goats from microbial pathogens.    

Palmitic acid-enriched fat supplementation alleviates negative production responses during early lactation of Holstein dairy cows

2020 ◽  
Vol 60 (13) ◽  
pp. 1598
Author(s):  
Hani M. El-Zaiat ◽  
Dyaaeldin Mohamed ◽  
Sobhy M. Sallam
Keyword(s):  
Fatty Acids ◽  
Palmitic Acid ◽  
Dairy Cows ◽  
Milk Yield ◽  
Body Condition ◽  
Body Condition Score ◽  
Fat Content ◽  
Lactation Period ◽  
Early Lactation ◽  
Condition Score

Effects of rumen-protected fat (RPF) on suppressing the negative performance responses in early lactation period of Holstein dairy cows were investigated. Three hundred multiparous Holstein cows (647 ± 16 kg bodyweight and 90 days in milk (DIM)) were randomly housed into three free-stall barns (100 cows per barn) and assigned to the treatments for 90 days, as follows: (1) control (CTL) diet without RPF; (2) calcium salt of palm fatty acids (CaFA) 30 g/kg DM, and (3) fractionated fatty acids of palm oil (FFA) 25 g/kg DM. Cows were fed total mixed ration containing 580 g of concentrate and 420 g of roughage per kilogram DM. Cows fed FFA exhibited a higher (P < 0.05) DM intake and body condition score than did those fed CaFA or CTL diets respectively. Moreover, cows fed the FFA diet showed decreased (P < 0.05) changes to bodyweight at 30 DIM and to body condition score at 60 DIM and increased digestibility of ether extract and neutral detergent fibre. Blood concentrations of triglycerides, cholesterol and glucose were higher (P < 0.05) for cows fed FFA diet than for those fed the other diets, between 4 and 30 DIM, whereas concentrations of non-esterified fatty acids, β-hydroxybutyric acid and urine ketones were lower for cows fed RPF sources (P < 0.05). Relative to CTL diet, CaFA and FFA diets increased (P < 0.05) milk yield and milk fat content at 4–30 DIM. Feeding FFA improved feed efficiency by 8.9% (P = 0.006), between 31 and 60 DIM, compared with CaFA. Inclusion of a palmitic acid-enriched fat supplement in Holstein cow diet increased milk yield and fat content and mitigated the deleterious effects of metabolic disorders during the early lactation period.

Feeding calcium salts of fatty acids in high-starch or high-fibre compound supplements to lactating cows at grass

1990 ◽  
Vol 51 (3) ◽  
pp. 441-447 ◽  
Author(s):  
P. C. Garnsworthy
Keyword(s):  
Fatty Acids ◽  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Live Weight ◽  
Fat Content ◽  
Calcium Salts ◽  
Significant Difference ◽  
High Fibre ◽  
Grazing Dairy Cows

ABSTRACTIn two experiments, the effects of protected fat and fibre were studied in compound supplements for grazing dairy cows. The protected fat used consisted of calcium salts of long-chain fatty acids. In experiment 1, 17 cows (group S) were given 4 kg/day of a starchy compound and 17 (group F) 4 kg/day of a high-fibre compound containing protected fat for the first 4 weeks after turn-out to grass. No significant difference was found between groups in milk yield, but cows in group F produced milk with a higher fat content (42·6 g/kg) than did those in group S (37·1 g/kg; P < 0·01) and had higher yields of fat (0·88 v. 0·79 kg/day; (P < 0·05). In experiment 2, four groups of five cows were given 4 kg/day of starchy (S) or fibrous (F) compounds, with (P) or without (C) protected fat for the first 4 weeks after turn-out. After 4 weeks, treatments (starchy or fibrous, added fat or none) were reversed for a further period of 4 weeks. There was no significant effect on milk yield, milk protein yield, live-weight change or change in condition score, although cows on treatment SC tended to produce less milk and have greater gains in live weight and condition. For groups SC, FC, SP and FP respectively, milk fat yields (kg/day) were 0·86, 0·98, 0·99 and 1·06 (s.e.d. 0·06); milk protein contents (g/kg) were 34·4, 34·8, 34·2 and 33·0 (s.e.d. 0·68) and calculated milk energy outputs (MJ/day) were 67/2, 74·3, 74·4 and 76·6 (s.e.d. 3·04). It is concluded that substituting fibrous compounds for starchy compounds tends to increase milk fat content and yield; adding calcium salts of fatty acids to either type of compound significantly increases milk fat content and yield but tends to decrease milk protein content.

scholarly journals Solvent-extracted soybean meal top-dressed on a fresh cow diet increased milk production, but not milk components, and decreased plasma non-esterified fatty acids

2019 ◽  
Vol 64 (No. 1) ◽  
pp. 26-40
Author(s):  
M. Ghelichkhan ◽  
H. Amanlou ◽  
R.A. Patton
Keyword(s):  
Fatty Acids ◽  
Milk Yield ◽  
Soybean Meal ◽  
Repeated Measures ◽  
Post Partum ◽  
Repeated Measures Design ◽  
Esterified Fatty Acids ◽  
Milk Components ◽  
True Protein ◽  
Dietary Treatments

Post-ruminally infused casein has increased milk and milk protein yield in post-partum cows. We theorised top dressing (TD) higher amounts of soybean meal (SBM) might mimic these effects. Fifty-one multiparous Holstein cows 1 day after calving were assigned to 3 dietary treatments: a base total mixed ration (CON) with 196 g/kg crude protein and 329 g/kg neutral detergent fibre; 17 cows TD with l kg of SBM (SBM1); and 17 cows TD with 2 kg of SBM (SBM2) for 30 days. Milk and milk components were measured at days 9, 18, and 27. Rumen and urine samples were collected on day 27; blood samples were obtained on day 30. Statistical inference was by JMP software (Version 10.0.2, 2012) with production variables analysed as a repeated measures design. Cows fed SBM increased milk yield (P = 0.02; 35.4, 36.6, and 42.6 kg/day for CON, SBM1, and SBM2, respectively). Yield of milk true protein was not different among treatments. Cows fed SBM had lower serum non esterified fatty acids concentrations at day 30 (1.35, 1.13, and 0.59 mM/l; P &lt; 0.01). We conclude that SBM TD beginning immediately after calving may increase milk yield rapidly and decrease dependence on fatty acids for energy.

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