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Full-Text Articles in Life Sciences

Effects Of Milk Feeding Strategies On Short- And Long-Term Productivity Of Holstein Cows, M. Garcia, S. R. Montgomery, L. Hulbert, B. Bradford Jan 2017

Effects Of Milk Feeding Strategies On Short- And Long-Term Productivity Of Holstein Cows, M. Garcia, S. R. Montgomery, L. Hulbert, B. Bradford

Kansas Agricultural Experiment Station Research Reports

The objectives of this study were to determine the impacts of feeding preweaning heifers with a high protein milk replacer (MR) or a raw or pasteurized non-saleable milk (NSM) on preweaning and first lactation performance. Holstein heifers (n = 154) were blocked by birth date and weight (BW) and within block randomly assigned to 1 of 3 treatments: 1) MR (4% protein and 2.6% fat, liquid basis); 2) pasteurized NSM (PNSM, 3.6% protein and 4.1% fat, liquid basis); or 3) raw NSM (RNSM, 3.6% protein and 4.1% fat, liquid basis). Heifers in RNSM were fed raw ...


Acknowledgments Jan 2017

Acknowledgments

Kansas Agricultural Experiment Station Research Reports

Appreciation is expressed to the following organizations for their support of dairy teaching, research, and extension at Kansas State University during 2016-2017.


Full Report, B. Bradford Jan 2017

Full Report, B. Bradford

Kansas Agricultural Experiment Station Research Reports

Kansas State University is pleased to present the 2017 Dairy Research Report of Progress.


Resynchronization Of Lactating Dairy Cows At Open Pregnancy Diagnosis Based On The Presence Or Absence Of A Corpus Luteum: A Practical Approach, J. A. Sauls, J. S. Stevenson Jan 2017

Resynchronization Of Lactating Dairy Cows At Open Pregnancy Diagnosis Based On The Presence Or Absence Of A Corpus Luteum: A Practical Approach, J. A. Sauls, J. S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Lactating Holstein cows in three herds were enrolled in a study at the time of nonpregnancy diagnosis. Cows were assigned to a resynchronization program based on ovarian structures determined by transrectal ultrasonography. Three resynchronization treatments were employed starting on the day of open diagnosis to test: (1) accuracy of ultrasound technician’s ability to identify a functional corpus luteum (CL); (2) whether an initial GnRH injection is required to start resynchronization when a CL is present at nonpregnant diagnosis (Short Synch: PGF — 24 hours — PGF — 32 hours — GnRH — 16 hours — timed artificial insemination [AI]); and (3) whether applying ...


Productivity Of A Triticale And Crimson Clover Winter Cover Crop For Dairies, K. Olagaray, C. Takiya, M. Scheffel, T. Brown, J. S. Stevenson, D. H. Min, B. Bradford Jan 2017

Productivity Of A Triticale And Crimson Clover Winter Cover Crop For Dairies, K. Olagaray, C. Takiya, M. Scheffel, T. Brown, J. S. Stevenson, D. H. Min, B. Bradford

Kansas Agricultural Experiment Station Research Reports

The potential for a winter cover crop to align with agronomic objectives and to support milk production was evaluated at the Kansas State University Dairy Teaching and Research Center, Manhattan, KS. August planting of a triticale and crimson clover blend following corn silage harvest resulted in production of more than 3.5 tons of dry matter prior to subsequent corn planting. After ensiling, the impact of triticale/crimson clover silage (TCS) on milk production was evaluated in 48 mid- to late-lactation Holstein cows. Cows were blocked by parity (1 and 2+) and milk production, then randomly assigned within block to ...


Case Study: Improving Heat Abatement Strategies For Lactating Dairy Cows In Southwest Kansas, L. Mendonca, A. Scanavez Jan 2017

Case Study: Improving Heat Abatement Strategies For Lactating Dairy Cows In Southwest Kansas, L. Mendonca, A. Scanavez

Kansas Agricultural Experiment Station Research Reports

Temperature loggers attached to intravaginal devices can be used to assess severity of heat stress in dairy cows. Vaginal temperature data collected using this method can be used to evaluate effectiveness of heat abatement systems. The goal for this study was to use vaginal temperature information to evaluate the impact of implementing new heat abatement strategies in order to minimize heat stress in lactating dairy cows. Vaginal temperature of cows from 2 dairies located in southwest Kansas were assessed during summers of 2014 and 2017. Dairy A improved the heat abatement systems in 2017, while Dairy B did not. Historical ...


The Effects Of An Evaporative Cooling System On Reducing Heat Load In Lactating Dairy Cows, J. R. Johnson, M. J. Wolf, J. Mcbride, Michael Brouk Jan 2017

The Effects Of An Evaporative Cooling System On Reducing Heat Load In Lactating Dairy Cows, J. R. Johnson, M. J. Wolf, J. Mcbride, Michael Brouk

Kansas Agricultural Experiment Station Research Reports

This study was conducted to evaluate the effect of 2 cooling systems on barn temperature, core body temperature (CBT), respiration rate, rear udder temperature, and lying time in lactating Holstein dairy cows. Twenty lactating Holstein dairy cows were randomly assigned to 1 of 2 treatment groups: CONV, where cows were housed in a conventional, open-sidewall freestall barn equipped with feedline soakers and fans located over the feedline and stalls; and TUNNEL, where cows were housed in a tunnel-ventilated freestall barn utilizing an evaporative cooling system. TUNNEL was effective at reducing barn temperature humidity index (THI) compared to CONV, but failed ...


Effects Of Dietary Supplementation Of Scutellaria Baicalensis Extract During Early Lactation On Milk Production Of Dairy Cattle, K. Olagaray, Michael Brouk, F. Robert, E. Dupuis, B. Bradford Jan 2017

Effects Of Dietary Supplementation Of Scutellaria Baicalensis Extract During Early Lactation On Milk Production Of Dairy Cattle, K. Olagaray, Michael Brouk, F. Robert, E. Dupuis, B. Bradford

Kansas Agricultural Experiment Station Research Reports

Multiparous Holstein cows (n = 122) were used in a randomized block design to determine the effect of short-term and long-term postpartum administration of Scutellaria baicalensis extract (SBE) on 305-day milk yield, 120-day milk component yield, and early lactation milk markers of inflammation and metabolic function. Treatments were (1) control, (2) short-term (5-day) administration of the SBE (SBE5), and (3) longterm (60-day) administration of the SBE (SBE60). Treatments were included in a treatment pellet that was identical to the control pellet in ingredient source and composition except for the extract, and both pellets were provided via an automated milking system. Milk ...


Association Between Reproduction And Postpartum Cow Health During Summer Months In Dairies Located In The Great Plains Region, L. Mendonca, A. Scanavez Jan 2017

Association Between Reproduction And Postpartum Cow Health During Summer Months In Dairies Located In The Great Plains Region, L. Mendonca, A. Scanavez

Kansas Agricultural Experiment Station Research Reports

Postpartum cow health has an impact on fertility of dairy cows, and impaired fertility in dairy herds ultimately influences profitability of dairy farms. During summer months, postpartum cow health and reproductive performance are affected in dairies located in the Great Plains region. The goal for this study was to evaluate farm-level associations between reproductive efficiency and postpartum cow health in dairy herds located in the Great Plains region. Data from June to August of 2010 to 2016 from 18 herds located in Colorado, Kansas, Oklahoma, Nebraska, and Texas were extracted. Overall pregnancy per AI was used as the measure of ...


Dose And Frequency Of Pgf2Α Administration To Lactating Dairy Cows Exposed To Presynchronization And Either Five- Or Seven-Day Ovsynch Protocols: Ovulation, Luteolysis, And Pregnancy Rates, J. S. Stevenson, J. A. Sauls Jan 2017

Dose And Frequency Of Pgf2Α Administration To Lactating Dairy Cows Exposed To Presynchronization And Either Five- Or Seven-Day Ovsynch Protocols: Ovulation, Luteolysis, And Pregnancy Rates, J. S. Stevenson, J. A. Sauls

Kansas Agricultural Experiment Station Research Reports

Lactating Holstein cows in one herd were milked three times daily and enrolled in a 2 × 2 × 2 factorial design with eight treatments before first postpartum artificial insemination (AI). These treatments were employed to test ovulatory, progesterone, and luteolytic outcomes to three main effects: (1) two GnRH-PGF presynchronization programs (PG-3-G vs. Double Ovsynch); (2) 5- vs. 7-day Ovsynch-duration programs; and (3) two doses (25 mg on consecutive days) or one dose (50 mg) of PGF administered before timed AI. Results from this experiment demonstrate no differences in the presynchronization treatments of PG-3-G vs. Double Ovsynch; both are effective ...


Foreword, B. Bradford Jan 2017

Foreword, B. Bradford

Kansas Agricultural Experiment Station Research Reports

Kansas State University is pleased to present the 2017 Dairy Research Report of Progress. We continue to watch the Kansas dairy industry grow, and in 2016 our state ranked 10th for largest growth in total milk produced. During the past 5 years (2011 to 2016), total milk production in Kansas has increased by 29%; the number of cows by 18%; and annual pounds of milk per cow by 1,785. Therefore, the Kansas dairy herd is not only growing, but is becoming more productive and efficient. At the end of 2016, Kansas ranked 13th nationally in milk yield per cow ...


Development Of A Berry Processing Score For Sorghum Silage And Assessment Of Processing Effects On Sorghum Silage Starch Digestibility, J. R. Johnson, J. P. Goeser, Michael Brouk Jan 2017

Development Of A Berry Processing Score For Sorghum Silage And Assessment Of Processing Effects On Sorghum Silage Starch Digestibility, J. R. Johnson, J. P. Goeser, Michael Brouk

Kansas Agricultural Experiment Station Research Reports

The objectives of this study were to develop a berry processing score (BPS) for sorghum silage, similar to the kernel processing score currently used for corn silage, and to evaluate the effects of processing on starch digestibility. Sorghum silage samples were collected from commercial farms in Kansas and randomly assigned to 1 of 4 processing levels differing in roll gap spacing: unprocessed (UNP), 1.5 (1.5P), 1.0 (1.0P), or 0.5 (0.5P) mm. Differences in BPS and starch digestibility were found–as the roll gap decreased, both BPS and starch digestibility increased. Thus, by processing sorghum ...