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Kansas Agricultural Experiment Station Research Reports

2017

Heat stress

Articles 1 - 3 of 3

Full-Text Articles in Life Sciences

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 ...


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 ...