The effect of recombinant bovine somatotrophin on milk production, reproduction and health of dairy cows

1987 ◽  
Vol 1987 ◽  
pp. 3-3 ◽  
Author(s):  
C. Thomas ◽  
I.D. Johnsson ◽  
W.J. Fisher ◽  
G.A. Bloomfield ◽  
S.V. Morant
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Mixed Diet ◽  
Body Weight Change ◽  
Flat Rate ◽  
Lactating Dairy Cows ◽  
Ad Libitum ◽  
Voluntary Intake ◽  
Milk Solids ◽  
Bovine Somatotrophin

The objective of the trial was to examine the effect of recombitant bovine somatotrophin (bSTH) on voluntary intake, milk solids output, body weight change, health and reproduction in lactating dairy cows given either a complete mixed diet or fed concentrate at a flat rate and forage ad libitum.

Prediction of voluntary intake of grass silage by lactating cows

1990 ◽  
Vol 1990 ◽  
pp. 61-61
Author(s):  
A. J. Rook ◽  
M. Gill ◽  
R. D. Willink
Keyword(s):  
Food Intake ◽  
Dairy Cows ◽  
Prediction Models ◽  
Flat Rate ◽  
Grass Silage ◽  
Lactating Cows ◽  
Ad Libitum ◽  
Voluntary Intake ◽  
The Uk ◽  
Voluntary Food Intake

Prediction of voluntary food intake is Important in the formulation of rations for dairy cows. There are a number of prediction models which perform relatively well for diets based on dry forages but not for silage based diets (Neal, Thomas and Cobby, 1984). Prediction of intake of silage based diets is particularly important in the UK where 0.85 of the conserved forage fed to dairy cows is silage. A large and increasing proportion of herds are fed silage ad-libitum and concentrates at a flat rate. This study was an attempt to produce better prediction models for voluntary intake of silage by dairy cows under this feeding regime.

Effects of body weight loss on serum progesterone concentrations of non-lactating dairy cows

2011 ◽  
Vol 75 (1) ◽  
pp. 131-137 ◽  
Author(s):  
R.O. Rodrigues ◽  
C. Trevisanuto ◽  
R.F. Cooke ◽  
J.L.M. Vasconcelos
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Dairy Cows ◽  
Body Weight Loss ◽  
Serum Progesterone ◽  
Lactating Dairy Cows

Effect of Metabolisable Protein on intake of grass silage and milk protein yield in dairy cows.

1994 ◽  
Vol 1994 ◽  
pp. 113-113 ◽  
Author(s):  
J.R. Newbold ◽  
B.R. Cottrill ◽  
R.M. Mansbridge ◽  
J.S. Blake
Keyword(s):  
Dairy Cows ◽  
Milk Protein ◽  
Live Weight ◽  
Protein Yield ◽  
Holstein Cows ◽  
Grass Silage ◽  
Lactating Dairy Cows ◽  
Ad Libitum ◽  
Few Data

Few data are available to evaluate the Metabolisable Protein (MP) System (AFRC, 1992) as an aid to ration formulation for dairy cows. Responses of lactating dairy cows to MP were evaluated in two experiments.In Experiment One, groups of 10 Holstein cows were offered grass silage ad libitum and 7kg DM/d of one of six (treatments 1-6) compound foods from 39d after calving, for eight weeks. All rations were isoenergetic, assuming silage intake of 11kg DM/d (typical for the herd). Ratios between MP supply (calculated from in situ protein degradability measurements) and requirement (calculated for a standard cow: 565kg live weight, 281 milk/d, 40g/kg butterfat, 33g/kg milk protein, liveweight change =0kg/d) were 1.00, 1.02, 1.06, 1.06, 1.1 and 1.17 for treatments 1-6, respectively.

Prediction of body weight and composition in lactating dairy cows: Relationship between body condition score and body composition

2005 ◽  
Vol 2005 ◽  
pp. 19-19
Author(s):  
T. Yan ◽  
R. E. Agnew ◽  
C. S. Mayne
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Dairy Cows ◽  
Milk Production ◽  
Body Condition ◽  
Body Condition Score ◽  
Early Lactation ◽  
Lactating Dairy Cows ◽  
Condition Score ◽  
Body Concentration

Body condition of lactating dairy cows varies at different stages of lactation. Cows usually mobilise their body reserves to provide energy and protein for milk production in early lactation, and gain weight to deposit energy and protein for pregnancy at a later stage. The objective of the present study was to examine relationships between body condition score (CS) and body concentration of lipid, CP and energy.

scholarly journals Relationships Between Urea Dilution Measurements and Body Weight and Composition of Lactating Dairy Cows

2005 ◽  
Vol 88 (7) ◽  
pp. 2476-2486 ◽  
Author(s):  
R.E. Agnew ◽  
T. Yan ◽  
W.J. McCaughey ◽  
J.D. McEvoy ◽  
D.C. Patterson ◽  
...  
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Lactating Dairy Cows

Evaluating feeding strategies for dairy cows: a modelling approach

1983 ◽  
Vol 36 (1) ◽  
pp. 47-57 ◽  
Author(s):  
C. J. Doyle
Keyword(s):  
Weight Gain ◽  
Dairy Cows ◽  
Live Weight ◽  
Economic Loss ◽  
Feeding Strategies ◽  
Flat Rate ◽  
Ad Libitum ◽  
Different Levels ◽  
Significant Economic Loss ◽  
Modelling Approach

ABSTRACTUsing a model to simulate food intake and the partition of food between milk production and live-weight gain, an attempt has been made to explore the financial implications of different levels and patterns of concentrate feeding, where silage is fed ad libitum. In the case of high-yielding cows it appeared that, although feeding more concentrates increased overall lactation yield, profits per cow and per hectare declined with increasing concentrate usage. This raises doubts concerning the traditional view that higher profits result from increasing yields per cow. Comparing different patterns of feeding it also appeared that there was no significant economic loss from flat-rate compared to stepped feeding of concentrates, where cows had ad libitum access to silage.

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