Effects of stage of lactation on the response of dairy cows to abomasal infusions of casein

1986 ◽  
Vol 15 (1) ◽  
pp. 97-102 ◽  
Author(s):  
L Istasse ◽  
A.C Brewer ◽  
E.R Ørskov
Keyword(s):  
Dairy Cows ◽  
Stage Of Lactation

Effects of feeding peas to high-producing dairy cows

1995 ◽  
Vol 75 (4) ◽  
pp. 625-629 ◽  
Author(s):  
R. R. Corbett ◽  
L. A. Goonewardene ◽  
E. K. Okine
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Dairy Herd ◽  
Protein Source ◽  
Canola Meal ◽  
Stage Of Lactation ◽  
Nutrient Analyses ◽  
Protein Milk

The effect of substituting peas for soybean and canola meals as a protein source in a high-producing dairy herd was studied in 66 Holstein cows, divided into two groups based on stage of lactation, parity, level of milk production and days in milk. Two 18.5% crude protein grain concentrate diets were formulated based on the nutrient analyses of the forages available. The control grain mix contained standard protein sources, principally soybean and canola meal (SBM\CM) while the test grain mix was formulated to contain approximately 25% field peas as the major source of protein. Both grain rations were formulated to the same nutrient specifications and balanced for undegradable protein. The duration of the trial was 6 mo during which grain feeding levels were adjusted monthly based on milk yield. For cows in early lactation, 4% fat-corrected milk yield was higher (P < 0.05) for cows fed pea based concentrates (31.3 kg d−1) than for cows fed SBM\CM supplement (29.7 kg d−1). Fat-corrected milk yield was not affected by source of protein in mid- and late-lactation cows. Fat-corrected milk production was not different (P > 0.05) for cows fed SBM\CM compared with cows fed the pea supplement when cows across all stages of lactation were included in the analyses. Milk fat percent was significantly higher (P < 0.05) for early- and mid-lactation cows fed the pea supplement. The results suggest that peas can be substituted for SBM\CM as a protein source for high-producing dairy cows. Key words: Dairy cow, pea, soybean and canola meal supplement, undegradable protein, milk production

Injectable α-tocopherol for control of oxidized flavour in milk from dairy cows

1993 ◽  
Vol 73 (2) ◽  
pp. 381-392 ◽  
Author(s):  
E. Charmley ◽  
J. W. G. Nicholson
Keyword(s):  
Dairy Cows ◽  
Milk Fat ◽  
Tocopheryl Acetate ◽  
Tocopherol Concentration ◽  
Oral Supplementation ◽  
Stage Of Lactation ◽  
Commercial Farms ◽  
Quadratic Response ◽  
Control Milk ◽  
And Control

Two experiments were conducted to evaluate the use of intramuscular injections of d-α-tocopherol for control of spontaneous oxidized flavour (SOF) in milk. In exp. 1, 12 mid-lactation dairy cows were either not injected or given an intramuscular injection of 1500 or 3000 IU α-tocopherol on days 1, 8 and 15 of a 29-d experiment. Peak blood plasma and milk α-tocopherol levels were observed 1 and 3 d, respectively, after injection. In plasma there was a quadratic response (P = 0.02) in maximum α-tocopherol concentration to the level of α-tocopherol injected, but in milk the response was linear (P < 0.01). Milk fat concentration increased as level of α-tocopherol injected was increased (P < 0.01). Approximately 5% of the injected dose was excreted in milk over the 7 d following injection. In exp. 2, four commercial farms with a SOF problem in milk were used to test the efficacy of injectable α-tocopherol for control of SOF. Prior to the trial, cows with milk susceptible to oxidation were younger (P = 0.04), were at an earlier stage of lactation (P = 0.03) and tended to give more milk (P = 0.08). All cows were given an oral supplmement of 3000 IU dl-α-tocopheryl acetate per day and half were injected with 3000 IU α-tocopherol. Injection reduced the intensity of oxidized flavour (week 1, P < 0.01; week 2, P = 0.09) and elevated the levels of α-tocopherol in milk for up to 2 wk after injection (P < 0.01). α-Tocopherol injected intramuscularly can increase α-tocopherol levels in milk within 3 d and control milk oxidation. Subsequent oral supplementation can prolong these benefits. Key words: Oxidized milk, tocopherol, flavour, dairy cow

Effect of fat supplementation and stage of lactation on methane production in dairy cows

2015 ◽  
Vol 207 ◽  
pp. 10-19 ◽  
Author(s):  
Lene Alstrup ◽  
Anne Louise Frydendahl Hellwing ◽  
Peter Lund ◽  
Martin Riis Weisbjerg
Keyword(s):  
Dairy Cows ◽  
Methane Production ◽  
Fat Supplementation ◽  
Stage Of Lactation

scholarly journals RELATIONSHIP BETWEEN BLOOD METABOLIC PROFILES AND MILK YIELD ASSOCIATED WITH PARITY AND STAGE OF LACTATION IN CROSSBRED DAIRY COWS IN BANGLADESH

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
L Naher ◽  
M. A. Samad ◽  
S. H. M. F. Siddiki ◽  
M. T. Islam
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Metabolic Profile ◽  
Transition Period ◽  
Dairy Herds ◽  
Metabolic Profiles ◽  
Milk Samples ◽  
Stage Of Lactation ◽  
Lactating Dairy Cows ◽  
Calcium Phosphorus

Background: Cattle cross-breeding program has been launched throughout Bangladesh but this program has still focused mainly on biological rather than economic evaluation. Currently, 30000 dairy farms with mainly cross-bred cows are in operation throughout the country and this intensive dairy farming system with high milk yielding dairy cows is supposed to be associated with high incidence of sub-clinical nutritional and metabolic diseases. Objectives: The objective of this study was to detect the relationship between major blood metabolic profiles and milk yield associated with parity and stage of lactation in cross-bred dairy cows. Materials and Methods: Blood samples of 220 apparently healthy lactating cross-bred dairy cows (HF x L, n = 190; SH x L, n = 20 and JS x L, n = 10) of 10 dairy herds were collected for metabolic profile test (MPT) in Bangladesh during the period from July to November 2016. The major metabolic profiles which are associated with milk fever (calcium, phosphorus & magnesium) and ketosis (glucose) were considered in this study. These biochemical parameters were estimated to detect the influence of risk factors including herds, breeds, parities and lactation age of cross-bred lactating dairy cows by using the commercial kits in spectrophotometer method. Results: The evaluation of the biochemical constituents of 220 cross-bred lactating dairy cows revealed that 30% (n = 66) had hypocalcaemia and 20.45% (n = 45) had hypoglycemia. Significantly lower levels of average calcium (7.93 ± 0.36 mg/dl; p < 0.024) and glucose (43.44 ± 3.63 mg/dl; p < 0.0001) values were recorded in HF x L cross-bred dairy herd of BAUDF, Mymensingh in comparison to other investigated nine dairy herds. The highest milk yield was recorded at 7th parity (16 +- 0.91 liter / day) and 1st week of lactation (17.33 +- 1.09 liter / day) were associated with low mean calcium (8.09 +- 0.85 mg / dl; 6.68 +- 0.13 mg/dl) and glucose (36.45 +- 7.67 mg/dl; 32.31 +- 3.90 mg / dl) levels in comparison to the respective values of different parity and lactation weeks. Conclusions: A relationship between blood metabolic profiles and milk yield associated with herd, breed, parity and lactation stages was recorded in lactating crossbred dairy cows. The evaluation of blood metabolites at different stages of lactation cycle especially at transition period is required to detect the nutritional and metabolic health for optimum milk production and to achieve maximum reproductive potential of high yielding dairy cattle. The readily available milk samples could be used as a biological fluid to monitor the health and nutritional status of dairy cows by using mid-infrared (MIR) spectroscopy method to prevent sub-clinical metabolic disorders. Therefore, well developed laboratories with necessary equipment, test kits and reagent should be provided to perform MPT in both the blood and milk samples for practical uses. Keywords: Compton metabolic profile test, Metabolic profile, Lactating cross-bred cows, Calcium, Phosphorus, Magnesium, Glucose, Parity, Lactation stages

Effect of age and stage of lactation on whey protein content in milk of cows of different breeds

2013 ◽  
Vol 16 (2) ◽  
pp. 395-397 ◽  
Author(s):  
J. Król ◽  
A. Brodziak ◽  
Z. Litwińczuk ◽  
A. Litwińczuk
Keyword(s):  
Dairy Cows ◽  
Protein Content ◽  
Whey Protein ◽  
Stage Of Lactation ◽  
Effect Of Age

Abstract The aim of the study was to determine the effect of age of cows, i.e. subsequent lactation and stage of lactation, on bioactive whey protein content in milk of dairy cows of six primary breeds kept in Poland. In all cases the significant correlations between lactoferrin concentration in milk and stage of lactation was stated. Its content gradually increased with the course of lactation but the changes in the content of this protein were highly dependent on breed of cows, what was indicated also by high interactions between breed and stage of lactation.

Effects of abomasal fat infusion on dry matter intake, milk production and splanchnic metabolism in dairy cows at two stages of lactation

1997 ◽  
Vol 1997 ◽  
pp. 21-21
Author(s):  
J.A. Benson ◽  
C.K. Reynolds ◽  
D.J. Humphries ◽  
D.E. Beever ◽  
S.M. Rutter
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Dry Matter ◽  
Energy Concentration ◽  
Dietary Energy ◽  
Negative Effects ◽  
Stage Of Lactation ◽  
Fat Infusion ◽  
Fat Supplements ◽  
Two Stages

Fat is often fed to dairy cows as a means of increasing dietary energy concentration; however feeding fat often reduces feed intake. For many fat supplements this can be due to negative effects on rumen digestion, however feeding rumen inert fat and post ruminal infusions of fat can also depress intake although the mechanism by which this happens is not clear. The effect of fat on intake may also be influenced by stage of lactation as in early lactation fatty acid levels in the blood can be elevated. The aim of the present study was to investigate the effects of fat infusion into the abomasum on dry matter (DM) intake, milk production and metabolism of splanchnic tissues (portal drained viscera (PDV) and liver) in early and mid lactation cows.

Body composition and performance of autumn-calving Holstein-Friesian dairy cows during lactation: non-carcass component weights

1992 ◽  
Vol 1992 ◽  
pp. 101-101 ◽  
Author(s):  
M.J. Gibb ◽  
W.E. Ivings ◽  
J.D. Sutton
Keyword(s):  
Body Composition ◽  
Dairy Cows ◽  
Dairy Cow ◽  
Present Experiment ◽  
Concentrate Supplementation ◽  
Fat Depots ◽  
Stage Of Lactation ◽  
Holstein Friesian ◽  
And Performance

In order to understand the complex changes associated with lactation in the dairy cow it is necessary to assess the contribution of the non-carcass components. It has been shown with sheep (Cowan, Robinson, Greenhalgh and McHattie, 1979) that a number of tissues may be mobilised during lactation with a redistribution of tissues particularly towards the gut and udder, and that diet may have a significant effect. Butler-Hogg, Wood and Bines (1985), using Friesian dairy cows showed changes in the weights of guts, internal fat depots (omental, mesenteric and perinephric) and liver with stage of lactation although the number of stages examined was somewhat limited. The present experiment investigates changes in non-carcass component weights at 9 points over the first 29 weeks of lactation and with 3 levels of concentrate supplementation.

Short-term feeding behaviour of dairy cows relative to food composition and stage of lactation

1998 ◽  
Vol 1998 ◽  
pp. 25-25
Author(s):  
B.L. Nielsen ◽  
N.C. Friggens ◽  
I. Kyriazakis ◽  
B.J. Tolkamp ◽  
G.C. Emmans
Keyword(s):  
Food Intake ◽  
Dairy Cows ◽  
Feeding Behaviour ◽  
Food Composition ◽  
Short Term ◽  
Physiological Mechanisms ◽  
Stage Of Lactation ◽  
Behavioural Characteristics ◽  
Major Factors ◽  
Voluntary Food Intake

Short-term feeding behaviour (STFB) has been used to elucidate the physiological mechanisms which control eating. It has been proposed as a means by which to predict voluntary food intake, and could be used to quantify behavioural characteristics of the cow. The first step in assessing the usefulness of STFB for these purposes is to identify the major factors which influence STFB. The aim of the study reported here was to evaluate, in dairy cows, the differences in STFB resulting from two different foods, the effect of stage of lactation on STFB, and the effect on STFB of changing from one food to another.

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