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Full-Text Articles in Life Sciences
Effects Of Chromium Propionate And Supplemental Amino Acids On Dairy Cattle Performance Near Peak Lactation (2013), Francisco J. Vargas, Kai Yuan, Evan C. Titgemeyer, Laman Mamedova
Effects Of Chromium Propionate And Supplemental Amino Acids On Dairy Cattle Performance Near Peak Lactation (2013), Francisco J. Vargas, Kai Yuan, Evan C. Titgemeyer, Laman Mamedova
Kansas Agricultural Experiment Station Research Reports
Feeding chromium in early lactation can increase milk production, but responses during peak lactation have not been studied. The objective of this study was to evaluate responses to chromium propionate during this period as well as interactions with rumen-protected lysine and methionine. Chromium propionate increased feed intake and tended to increase energy-corrected milk yield, and primiparous cows showed greater responses in feed intake and milk protein yield than multiparous cows. In this study, feeding chromium propionate near peak lactation increased feed intake and tended to increase productivity, but no benefits of supplementing rumen-protected lysine and methionine were observed.; Dairy Day, …
Concentrations Of Luteinizing Hormone And Ovulatory Responses In Dairy Cows Before Timed Artificial Insemination (2013), Stephanie Leeann Pulley, D. H. Keisler, Scott L. Hill, Jeffrey S. Stevenson
Concentrations Of Luteinizing Hormone And Ovulatory Responses In Dairy Cows Before Timed Artificial Insemination (2013), Stephanie Leeann Pulley, D. H. Keisler, Scott L. Hill, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to determine the incidence of spontaneous and gonadotropinreleasing hormone (GnRH)-induced surges of luteinizing hormone (LH) and ovulatory responses in lactating dairy cows enrolled in a timed artificial insemination (TAI) protocol. Cows (n = 70) in a single herd were assigned to one of two presynchronization protocols: Pre- 10 or PG-3-G. Cows assigned to the Pre-10 treatment received 2 injections of prostaglandin F2α(PGF2α) 14 days apart (Presynch), with the second injection administered 10 days before the onset of a TAI protocol. Cows assigned to the PG-3-G treatment received an injection of prostaglandin F2α(PGF2α), then 3 …
Five-Day Resynch Programs In Dairy Cows Including Controlled Internal Drug Release At Two Stages Post-Artificial Insemination (2013), Stephanie Leeann Pulley, Scott L. Hill, Jeffrey S. Stevenson
Five-Day Resynch Programs In Dairy Cows Including Controlled Internal Drug Release At Two Stages Post-Artificial Insemination (2013), Stephanie Leeann Pulley, Scott L. Hill, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Two experiments were conducted to assess pregnancy outcomes after a 5-day Ovsynch-56 Resynch (RES; gonadotropin-releasing hormone injection 5 days before [GnRH-1; d 0] and 56 hours (GnRH-2) after PGF2α[PG] injections on day 5 and 6, timed artificial insemination [TAI] on day 8) with and without a progesterone-releasing intravaginal controlled internal drug release (CIDR) 5-day insert. In Exp. 1, nonpregnant cows were enrolled on day 34 post- AI: day 34 RES-CON (n = 528) or day 34 RES-CIDR (n = 503). Blood was collected for progesterone assay. Pregnancy per AI (P/AI) was diagnosed by uterine palpation per rectum at 34 and …
Automated Activity Monitoring Of Estrus And Time Of Ovulation (2013), Jeffrey S. Stevenson
Automated Activity Monitoring Of Estrus And Time Of Ovulation (2013), Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Detection of estrus can be facilitated by use of automated activity monitors that measure physical activity. Increased physical activity is largely correlated with estrus. Our objective was to determine when ovulation occurs relative to increased physical activity so we could recommend optimal timing of insemination to maximize conception rates in lactating dairy cows. Cows (n = 65) were fitted with pressure-sensitive rump-mounted transmitters (HeatWatch; HW) that are activated by a mounting herdmate to indicate standing estrus. The same cows also were fitted with neck-mounted activity monitors (Select Detect; SD). Additional cows (n = 68) were fitted with only the activity …
Consumer Acceptance Of Cysteine-Enhanced Yogurt, Soumya Bala, Karen A. Schmidt
Consumer Acceptance Of Cysteine-Enhanced Yogurt, Soumya Bala, Karen A. Schmidt
Kansas Agricultural Experiment Station Research Reports
Within cells, cysteine can be synthesized from methionine by the enzyme γ-cystathionase. Cysteine is then utilized to synthesize glutathione, which has many functions in cells that contribute to good health. Certain subpopulations, however, especially the elderly, have decreased γ-cystathionase activity. Thus, dietary cysteine may be beneficial in maintaining health. In previous reports, a yogurt with enhanced cysteine content was made by incorporating whey protein isolate (WPI) into the mix's dairy base combined with a process treatment to minimize cysteine denaturation. The gel quality of this yogurt matched or exceeded that of a yogurt that was formulated and processed to mimic …