Author
REIS, RONALDO - UNIV OF WISCONSIN-MADISON | |
SAN EMETERIO, FRANCISCO - UNIV OF WISCONSIN-MADISON | |
CAMPOS, WARLEY - STUDY INTERN-BRAZIL | |
Satter, Larry |
Submitted to: Journal Dairy Science Supplement
Publication Type: Abstract Only Publication Acceptance Date: 7/31/1998 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: The objective was to evaluate the effect of corn source on nutrient use, milk yield and ruminal fermentation. Twelve rumen fistulated cows were arranged in two 6 X 6 Latin squares with 21 d periods. Treatments were dry shelled corn (DSC), high moisture shelled corn (HMSC) or high moisture ear corn (HMEC) that were coarsely ground (CG dgw 3.83 mm) or finely ground (FG Gdgw 1.15). TMR contained 46% forage and 54% concentrate and were fed once (1X) or twice (2X) daily according to the square. Orthogonal contrasts compared moisture level, presence of cob and fineness of grind. Ruminal NH3 and Ac:Pr ratio were decreased and total VFA and starch digestibility were increased (P<.05) by corn moisture and fine grinding with both 1X and 2X feeding. Moisture, fine grind and absence of cob improved milk yield (P<.05) when cows were fed 2X. |