Effects Of Dietary Potassium Carbonate And Fat Concentration in High Distiller Grain Diets Fed To Dairy Cows
Year: 2013
Type: article
Abstract: supplemental K in the form of K 2 CO 3 from DCAD Plus® (Church & Dwight Co., Inc., Princeton, NJ).DCAD is a measure of the balance between cations and anions in the diet.DCAD over 20 meq/100 g DM improves performance for lactating cows, while low or negative DCAD benefit dry cows.Diets with added K had a DCAD of approximately 30, while diets without added K had a DCAD of 2. This low DCAD may have limited performance for cows fed diets without added K. Dry matter intake (DMI) decreased with added fat (21.0 vs. 22.5 kg/d; P<0.01) and tended to decrease with added K (21.4 vs. 20.1 kg/d; P<0.06).Milk yield decreased with added fat (30.5 vs. 32.3kg/d; P<0.01), which may have been due to decreased DMI.No fat x K interaction was observed perhaps because MFD occurred with all diets.Milk fat percent increased with added K (2.82% vs. 2.56%; P<0.01) and decreased with added fat (2.51% vs. 2.89%; P<0.01).Milk fat yield was affected similarly and tended to increase with added K (0.87 vs. 0.82 kg/d; P<0.10) and decreased with added fat (0.76 vs. 0.93 kg/d; P<0.01).Trans-10, cis-12 CLA in milk decreased with added K (P<0.02)indicating that the additional K 2 CO 3 was decreasing incomplete biohydrogenation.Trans-10, cis-12 CLA increased with added fat (P<0.01) because excess unsaturated fatty acids in the diet results in increased incomplete biohydrogenation.Supplemental K 2 CO 3 led to an increase in milk fat for both high fat and low fat diets indicating that it could be used to alleviate MFD, though values did not return to levels of a typical Holstein cow.` iv ACKNOWLEDGEMENTS Big thanks to Dr. Weiss for giving me a shot.Thanks for all the time you spent reading over my proposal, work plan, and thesis, watching me practice presentations, and teaching me how to be an all around better scientist and researcher.Thanks to Dr.Loerch for being there when I needed help stringing words together for applications and cover letters and for all of his help and support.Thanks to Dr. Kristy Daniels for all of her advising while I was here and also for
Author: Kathryn C Lamar
Institution: The Ohio State University
Language: English
Subfield: Animal Science and Zoology
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W2246796546