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- W109968708 abstract "OF DISSERTATION USE OF MTB-100, PROVIDED THROUGH A MINERAL MIX, TO REDUCE TOXICITY WHEN LACTATING BEEF COWS GRAZE ENDOPHYTE-INFECTED TALL FESCUE Two experiments were conducted at the University of Kentucky, Eden Shale Farm, Owenton, KY to evaluate the use of MTB-100 (Alltech, Inc., Nicholasville, KY) to alleviate the symptoms of fescue toxicity when lactating Angus x Beefmaster cows and their calves grazed endophyte-infected KY-31 tall fescue. Experiment 1 provided a carbohydrate based toxin adsorbent, MTB-100, ad libitum in a commercial mineral supplement to project a daily consumption rate of 0, 20 or 40 g of MTB-100 per cow. Cows were weighed, assigned a body condition score (BCS) and hair coat score (HC), rectal temperatures were recorded and fecal grab samples were taken for ergovaline (EV) and lysergic acid (LA) analysis every 35 days for three grazing seasons (May to September). Calves were also weighed and assigned a HC score. Although MTB-100 did not improve cow or calf performance, cows older than 4 years and those with greater Beefmaster breeding exhibited a higher tolerance to fescue toxicity than 2 and 3-yr-olds and cows with greater Angus breeding. Experiment 2 was conducted to evaluate the response of lactating beef cows and their calves to strategic supplementation with MTB-100. MTB-100 was mixed with a complete mineral so daily intake was projected to be 0 or 20 g/cow. The experimental period extended from May 5 to October 2 and was divided into 3 strategic periods: P1 = May 5 to July 5; P2 = July 5 to August 31; P3 = August 31 to October 2. Treatments were either 0 or 20 g•cow•d MTB-100 within a period (Treatment 1 = 0, 0, 0; Treatment 2 = 20, 0, 20; Treatment 3 = 0, 20, 0; Treatment 4 = 20, 20, 0; and Treatment 5 = 20, 20, 20). Cow and calf performance was measured the same as Exp. 1, but every 21 days. Supplementation early in the grazing season tended to improve cow weight gain and body condition; however, there was no effect on calf performance. Fecal output of EV and LA did not increase in either experiment with supplementation. In conclusion, strategically invoked MTB-100 consumption can increase performance of cows grazing endophyte-infected tall fescue forage." @default.
- W109968708 created "2016-06-24" @default.
- W109968708 creator A5054987457 @default.
- W109968708 date "2013-01-01" @default.
- W109968708 modified "2023-09-27" @default.
- W109968708 title "USE OF MTB-100TM, PROVIDED THROUGH A MINERAL MIX, TO REDUCE TOXICITY WHEN LACTATING BEEF COWS GRAZE ENDOPHYTE-INFECTED TALL FESCUE" @default.
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