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Short Communication: Associations Between Blood Calcium Status at Calving and Milk Yield in Dairy Cows
blood plasma concentration hypocalcemia milk yield
2008/8/6
The purpose of the present study was to estimate the effect of total blood plasma calcium (TBPCC) concentration at calving on milk yield in dairy cows. Data originated from 153 dairy cows in 27 herds ...
Short Communication: Effects of Isolation Stress on Mammary Tight Junctions in Lactating Dairy Cows
isolation stress endotoxin milk tight junction
2008/8/5
Eighteen cows had been selected for their responsiveness to psychological stress during the first lactation and were classified as having low (n = 10) or high (n = 8) cortisol concentrations in respon...
Soybeans Versus Animal Sources of Rumen-Undegradable Protein and Fat for Early Lactation Dairy Cows
roasted soybeans animal by-products dairy cattle lactation
2008/8/1
Fifteen multiparous Holstein cows averaging 39 DIM were used in a replicated 5 x 5 Latin square design to compare roasted soybeans and animal by-products as supplements for increasing the RUP content ...
The Association Between Previous 305-day Milk Yield and Disease in New York State Dairy Cows
disease milk yield dairy cows
2008/7/28
Logistic regression was used to examine the association between milk yield and disease. We studied 8070 cows of second or higher parity from 25 New York State Holstein herds, calving between June 1990...
The Effect of Bovine Somatotropin and Diet on Somatotropin Binding Sites in Hepatic Tissue of Lactating Dairy Cows
binding sites dairy cows liver somatotropin
2008/7/23
In the lactating cow, galactopoiesis is stimulated by treatment with recombinant bovine somatotropin (bST) and by an improved plane of nutrition. The present study determined the interaction between t...
The Effect of Feed Intake and Growth Hormone-Releasing Factor on Lactating Dairy Cows
growth hormone-releasing factor intake insulin-like growth factor-I binding proteins
2008/7/18
Twenty-four lactating dairy cows, averaging 30.0 kg/d of milk and 159 d of lactation, were used to study the effect of feed intake and growth hormone-releasing factor in a 2 x 2 factorial arrangement....
The Effect of Supplementary Protein on In Vivo Metabolism of the Mammary Gland in Lactating Dairy Cows
protein mammary gland metabolism lactation
2008/7/16
Four lactating cows equipped with rumen and duodenal cannulas were fed a diet of grass silage and concentrates containing either 12.4 or 17.2% CP (DM basis) in a change-over design. Additional protein...
The Effect of Treating Forages with Fibrolytic Enzymes on its Nutritive Value and Lactation Performance of Dairy Cows
enzymes cellulase xylanase forage
2008/7/16
Forages (corn silage and alfalfa hay) were sprayed with liquid enzymes prior to combining with a concentrate to form a total mixed ration (50% forage:50% concentrate, dry matter basis) and fed to lact...
The Effects of Time of Disease Occurrence, Milk Yield, and Body Condition on Fertility of Dairy Cows
test-day milk yield conception mastitis body condition score
2008/7/14
The associations between occurrence of diseases, milk yield, and body condition score on conception risk after first artificial insemination (AI) were analyzed in an observational study on a convenien...
The Influence of Body Condition on the Fasting Energy Metabolism of Nonpregnant, Nonlactating Dairy Cows
fasting heat production condition score dairy cow
2008/7/10
The objective of this experiment was to investigate the effect of cow body condition score on fasting heat production. Twelve nonpregnant, nonlactating Holstein-Friesian cows were selected from within...
The Lactational Responses of Dairy Cows to Amount of Feed and to the Source of Carbohydrate Energy
lactation plane of nutrition feed composition dairy cows
2008/7/9
An experiment was designed to test whether responses to variation in plane of nutrition conformed to a linear model or to a diminishing response curve model and to examine the influence of type of ene...
The Natural Food Grade Inhibitor, Lacticin 3147, Reduced the Incidence of Mastitis After Experimental Challenge with Streptococcus dysgalactiae in Nonlactating Dairy Cows
natural inhibitor bacteriocin mastitis
2008/7/7
Lacticin 3147 is a broad-spectrum bacteriocin produced by the food-grade organism Lactococcus lactis. Lacticin 3147 is active at a neutral pH and has been shown to be bactericidal to streptococci and ...
Time Trends of Plasma Lipids and Enzymes Synthesizing Hepatic Triacylglycerol During Postpartum Development of Fatty Liver in Dairy Cows
dairy cows fatty liver dry period glycerolipid synthesis
2008/7/2
We studied development of fatty liver in high producing dairy cows with free access to feed during the dry period and thus showed the combined effects of parturition and prepartum overfeeding. Postpar...
Trans-Octadecenoic Acids and Milk Fat Depression in Lactating Dairy Cows
trans-octadecenoic acids insulin milk fat depression fat synthesis
2008/7/1
We examined the role of trans-octadecenoic acids in milk fat depression when low fiber diets were fed. The study consisted of four experimental periods with a 2 x 2 factorial arrangement of treatments...
Treatment of Noncyclic Lactating Dairy Cows with Progesterone and Estradiol or with Progesterone, GnRH, Prostaglandin F2 and Estradiol
induction of estrus reproductive performance dairy cow
2008/7/1
The efficacy of two programs for treating noncyclic cows was compared. In trial 1,478 cows in five herds were randomly divided into two groups. Cows in one group (C group) were treated with an intrava...