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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...
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...
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...
Use of Bovine Somatotropin in Lactating Dairy Cows Receiving Timed Artificial Insemination
timed artificial insemination bovine somatotropin lactating cows
2008/6/27
Objectives of the research were to examine the effect of bovine somatotropin (bST) on pregnancy rates to a timed artificial insemination protocol and to test a re-synchronization system with two conse...
Use of Prostaglandin F2 as a Postpartum Reproductive Management Tool for Lactating Dairy Cows
prostaglandin F2 reproductive efficiency reproductive programs
2008/6/24
This study compared three programs for reproductive management of the postpartum period for reproductive performance and net economic benefit within three dairy herds (n = 1624 cows). Cows on one prog...
Variation in and Relationships Among Feeding, Chewing, and Drinking Variables for Lactating Dairy Cows
feeding behavior chewing activity variation sample size
2008/6/20
Twelve Holstein cows (63 DIM; 6 primiparous) were offered a common diet and monitored for 21 d (11 d of adaptation, 10 d of collection) with a data acquisition system to measure continuously feed and ...
Whole Cottonseeds or a Combination of Soybeans and Soybean Hulls in the Diets of Lactating Dairy Cows
cottonseed soybeans soybean hulls
2008/6/16
Whole raw soybeans and soybean hulls were evaluated as a dietary replacement for whole cottonseed as determined by rumination and total chewing activity, milk fat percentage, and efficiency of 4% fat-...