scholarly journals The effect of different levels of teat-end hyperkeratosis on mammary infrared thermograph and mastitis in dairy cows

2019 ◽  
Vol 66 (1) ◽  
pp. 21-26
Author(s):  
JUOZAITIENE Vida; JUOZAITIS
Keyword(s):  
Dairy Cows ◽  
Infrared Thermograph ◽  
Different Levels

scholarly journals Excretion and Storage of Dieldrin in Dairy Cows Fed Thyroprotein and Different Levels of Energy

1969 ◽  
Vol 52 (2) ◽  
pp. 172-182 ◽  
Author(s):  
D.G. Braund ◽  
L.D. Brown ◽  
J.T. Huber ◽  
N.C. Leeling ◽  
M.J. Zabik
Keyword(s):  
Dairy Cows ◽  
And Storage ◽  
Different Levels

The effect of feeding intensity during the dry period on plasma leptin and time to return to cyclicity in dairy cows

2002 ◽  
Vol 2002 ◽  
pp. 1-1 ◽  
Author(s):  
K. Holtenius ◽  
S. Agenäs ◽  
H. Gustafsson ◽  
C. Delavaud ◽  
Y. Chillard
Keyword(s):  
Nutritional Status ◽  
Dairy Cows ◽  
Body Condition ◽  
Reproductive Function ◽  
Peptide Hormone ◽  
Dry Period ◽  
Feeding Intensity ◽  
Plasma Leptin ◽  
Different Levels ◽  
Effect Of Feeding

Much evidence has accumulated showing that female reproductive functions are disrupted when changes in nutritional status take place in both over- and undernutrition. The peptide hormone leptin is considered a possible link between nutrition and reproduction. One objective with the present study was to investigate how different levels of feed intake during the dry period, thereby creating differences in body condition at parturition, affected the plasma leptin concentration and the reproductive function after parturition.

Effects of feeding yeast (Saccharomyces cerevisiae) on productive performance and blood components of lactating Holstein dairy cows

2003 ◽  
Vol 2003 ◽  
pp. 106-106
Author(s):  
M. Dehghan Banadaky ◽  
A. Nik Khah ◽  
A. Zali
Keyword(s):  
Dairy Cows ◽  
Dairy Production ◽  
Yeast Culture ◽  
Blood Components ◽  
Productive Performance ◽  
Yeast Saccharomyces Cerevisiae ◽  
Natural Modes ◽  
Animal Feeding ◽  
Different Levels ◽  
Holstein Dairy Cows

Antibiotics have widely been used in animal feeding. However, because of the growing concern of consumers towards more natural modes of production, interest in the use of direct fed microbials is now considerable. In dairy production, the Yeast culture (Saccharomyces cerevisiae) has been studied and used. Therefore, an experiment was conducted to evaluate the effects of different levels of yeast (Saccharomyces cerevisiae SC47) on productive performonce of Holstein dairy cows.

Influence of Different Levels of Dietary Energy on Performance of Double Suckled Cows and Calves

1986 ◽  
Vol 1986 ◽  
pp. 106-106
Author(s):  
M.A.S. Khan ◽  
J.H. Topps ◽  
P.J. Broadbent
Keyword(s):  
Dairy Cows ◽  
Good Condition ◽  
Beef Cows ◽  
Free Access ◽  
Dietary Energy ◽  
Early Lactation ◽  
Concentrate Mixture ◽  
Soyabean Meal ◽  
Ad Libitum ◽  
Different Levels

The winter feeding of beef cows represents a high, proportion of the costs of calf production. Attempts to minimise cost include the use of beef (♂) x dairy cows (♀) which have the ability to suckle two calves and to mobilise body reserves during periods of underfeeding in early lactation. Khan and Topps (1985) observed that cows in good condition at calving could maintain milk production and raise two good calves when given 110 MJ ME/day in a diet which included a source of undegradable protein. Subsequently a preliminary experiment was carried out with three single suckled and nine double suckled cows to examine the effect of energy level on the performance of cows and calves.Three single suckled cows and nine double suckled cows i.e. six with a natural plus foster calf and three with twin calves produced by embryo transfer were used in this experiment. The levels of energy that were examined were 70 or 90, 80 or 100 and 90 or 110 MJ ME/day for single and double-suckled cows respectively, supplied in diets containing ammonia treated straw, barley and fishmeal. Nine of the cows were placed into trios according to calving date and age, with a trio consisting of a cow with a natural calf, a cow with a natural and foster calf, and a cow with twin calves. Each trio was allocated at random to one of the three levels of energy. Similarly, the remaining three cows with a natural and foster calf were allocated at random to 90, 100 or 110 MJ ME/day. The calves were given good quality hay ad libitum and free access to a concentrate mixture up to a maximum intake of 2 kg/head/day. The concentrate mixture consisted of (g/kg) 800 barley, 150 soyabean meal and 50 molassine meal. The experiment started on the 22nd day of lactation and was of 20 weeks duration for most of the cows.

PLASMA INSULIN AND GROWTH HORMONE IN DAIRY COWS; DIURNAL VARIATION AND RELATION TO FOOD INTAKE AND PLASMA SUGAR AND ACETOACETATE LEVELS

1973 ◽  
Vol 73 (2) ◽  
pp. 289-303 ◽  
Author(s):  
Knut Hove ◽  
Anne Kristine Blom
Keyword(s):  
Growth Hormone ◽  
Food Intake ◽  
Diurnal Variation ◽  
Dairy Cows ◽  
Plasma Levels ◽  
Plasma Insulin ◽  
Diurnal Variations ◽  
Plasma Growth Hormone ◽  
The Mean ◽  
Different Levels

ABSTRACT Marked diurnal variations were found in plasma growth hormone (GH), insulin, acetoacetate (AcAc) and sugar in two herds (U and A) of dairy cows kept at two different levels of feeding. Seven animals from each herd were tested. The main diurnal variations were related to food intake, a significant increase in plasma insulin, and a significant decrease in plasma sugar being found. The acetoacetate level rose significantly during feeding in herd U (moderately underfed), while no significant increase was found in herd A (adequately fed). Plasma growth hormone was found to decrease (P < 0.01) only during feeding in herd U, while no change in the GH level could be detected in herd A. The mean level of GH in herd U was found to be twice the value found in herd A. There were no significant differences between the herds in plasma insulin and sugar. Significant differences in plasma levels of GH, insulin and sugar were found between animals when analysed within the herds. Variations in the levels of insulin and acetoacetate were very small during the night. This is contrary to GH, which shows the least variation during food intake. The correlation coefficient between the plasma components was low, although in many cases significant.

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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