title: Effects of supplemental Bermuda grass hay or corn on intake, digestion and performance of cattle consuming endophyte-infected fescue.
abstract: Effects of supplemental Bermuda grass hay (BG) or ground corn on intake, digestion and performance of cattle consuming endophyte-infected fescue (I) were studied. In Exp. 1, a Latin square study, five growing Holstein steers (158.1 kg) consumed I ad libitum and were offered 0, .3, .6, .9 or 1.2% body weight (BW) of BG daily. Total dry matter (DM) intake rose linearly (P less than .05) with increasing BG, although intake was numerically similar with .6, .9 and 1.2% BW of BG. Digestibility was constant with diet (P greater than .10). Six growing Holstein steers used in Exp. 2, a Latin square with a 2 x 3 factorial arrangement of treatments, ingested I or noninfected (NI) fescue hay ad libitum with 0, .5 or 1.0% BW of ground corn. Total DM intake increased linearly as the level of corn rose (P less than .05). Total intake with I increased more with the first than with the second addition of corn, and the opposite occurred with NI (interaction between fescue infection and the quadratic effect of corn level, P less than .10). Organic matter digested (g/d) was greater for NI than for I and rose linearly with increasing corn ingestion (P less than .05). Ninety-six crossbred beef heifers and steers (184.2 kg avg initial live weight) were used in a 77-d fall grazing experiment (Exp. 3) with a 2 x 3 factorial treatment arrangement. Cattle grazed I or NI paddocks and were given no supplement or .34% BW of BG or .65% BW of ground corn on a daily basis (DM).(ABSTRACT TRUNCATED AT 250 WORDS)
authors: Anim. Sci. Dept., University of Arkansas, Fayetteville 72701.
authors: S R
authors: SR
authors: Stokes
authors: A L
authors: AL
authors: Goetsch
authors: H H
authors: HH
authors: Nejad
authors: G
authors: G
authors: Murphy
authors: A L
authors: AL
authors: Jones
authors: S
authors: S
authors: Mashburn
authors: K W
authors: KW
authors: Beers
authors: Z B
authors: ZB
authors: Johnson
authors: E L
authors: EL
authors: Piper
mesh_terms: D000821:Animal Feed / Q000633:toxicity*; D000818:Animals; D002417:Cattle / Q000378:metabolism*; D004063:Digestion; D005506:Food Contamination; D005516:Food Microbiology; D008297:Male; D006109:Poaceae; D003313:Zea mays