title: Feed intake and digestibility by cattle consuming bermudagrass or orchardgrass hay supplemented with soybean hulls and(or) corn.
abstract: Effects of supplementing cattle consuming tropical or temperate grass with corn and (or) soybean hulls on feed intake and digestibility were determined. In Exp. 1, eight Holstein steer calves (210 +/- 9.2 and 269 +/- 9.4 kg initial and final BW, respectively), in two simultaneous Latin squares, were given ad libitum access to bermudagrass (B) or orchardgrass (O) hay without supplementation or with (DM basis) .5% of BW of ground corn (C), .7% of BW of soybean hulls (H), or .25% of BW of corn plus .35% of BW of soybean hulls (CH). Total OM intake was greater (P < .05) with than without supplementation (5.05, 6.04, 5.95, 6.06, 6.04, 6.81, 6.61, and 6.69 kg/d), and digestible OM intake was affected by forage source (P < .05), mixing of supplement types (CH versus the mean of C and H; P < .09), and the forage source x supplementation interaction (P < .09; 2.65, 3.40, 3.33, 3.46, 3.71, 4.14, 3.98, and 4.30 kg/d for B, B-C, B-H, B-CH, O, O-C, O-H, and O-CH, respectively). Total tract NDF digestibility was greater (P < .05) for O than for B diets and for H than for C (56.4, 53.9, 58.1, 56.9, 68.5, 64.9, 67.7, and 69.6% for B, B-C, B-H, B-CH, O, O-C, O-H, and O-CH, respectively). In Exp. 2, mature cannulated beef cattle (524 +/- 1.6 kg BW) were used in a design similar to Exp. 1 with comparable dietary supplement levels.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Animal Science, University of Arkansas, Fayetteville 72701.
authors.forename: D L
authors.initials: DL
authors.lastname: Galloway
authors.forename: A L
authors.initials: AL
authors.lastname: Goetsch
authors.forename: L A
authors.initials: LA
authors.lastname: Forster
authors.forename: A R
authors.initials: AR
authors.lastname: Patil
authors.forename: W
authors.initials: W
authors.lastname: Sun
authors.forename: Z B
authors.initials: ZB
authors.lastname: Johnson
mesh_terms: D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000502:physiology*; D004043:Dietary Fiber; D004063:Digestion; D004435:Eating; D005260:Female; D005527:Food, Fortified; D005772:Gastrointestinal Transit; D008297:Male; D006109:Poaceae; D012417:Rumen / Q000737:chemistry; D013025:Glycine max; D003313:Zea mays