TY - JOUR
T1 - Effects of Proportions of Steam-Flaked Corn and Grain Sorghum and Switching Grain Sources During the Finishing Period on Performance and Carcass Characteristics of Finishing Beef Steers
AU - Duff, G. C.
AU - Malcolm-Callis, K. J.
AU - Galyean, M. L.
N1 - Publisher Copyright:
© 2002 American Registry of Professional Animal Scientists
PY - 2002/12/1
Y1 - 2002/12/1
N2 - Three studies were conducted to determine effects of proportions of steam-flaked corn (SFC) and steam-flaked grain sorghum (SFGS) in the finishing diet (Exp. 1), effects of switching grain sources on d 56 of the finishing period on performance and carcass characteristics of finishing beef steers (Exp. 2), and effects of these two dietary ingredients on in vitro DM disappearance (IVDMD) (Exp. 3). For Exp. 1, 180 medium-framed beef steers (British × Continental) were used. Treatments included (DM basis) 100% SFC:0% SFGS, 75% SFC:25% SFGS, 50% SFC:50% SFGS, 25% SFC:75% SFGS, and 0% SFC:100% SFGS. Increasing the proportion of SFGS in the finishing diet increased (P<0.01) feed:gain for the overall experiment and resulted in a linear decrease (P<0.01) in calculated NE, NE, and ME values of the diet. No differences (P>0.10) were noted among treatments for carcass characteristics. In Exp. 2, 144 medium-framed beef steers (British × Continental) were used. Treatments were SFC fed from d 0 to end (Treatment 1), SFC fed from d 0 to 56 and SFGS fed from d 57 to end (Treatment 2), SFGS fed from d 0 to 56 and SFC fed from d 57 to end (Treatment 3), and SFGS fed from d 0 to end (Treatment 4). Experiments 1 and 2 were conducted concurrently, and steers on Treatments 1 and 4 were the same steers used in Exp. 1 and fed 100:0 and 0:100, respectively. Average daily gain was decreased (P<0.10), and feed:gain was increased (P<0.05) for the average of Treatments 2 and 3 vs Treatment 1 for the overall experiment. In vitro DM disapperance of diets used in Exp. 1 was similar (P>0.10) among treatments after 4, 12, 24, and 48 h of incubation. Results suggest no benefit from mixing SFC and SFGS in finishing diets, and switching grain sources during the finishing period may adversely affect performance.
AB - Three studies were conducted to determine effects of proportions of steam-flaked corn (SFC) and steam-flaked grain sorghum (SFGS) in the finishing diet (Exp. 1), effects of switching grain sources on d 56 of the finishing period on performance and carcass characteristics of finishing beef steers (Exp. 2), and effects of these two dietary ingredients on in vitro DM disappearance (IVDMD) (Exp. 3). For Exp. 1, 180 medium-framed beef steers (British × Continental) were used. Treatments included (DM basis) 100% SFC:0% SFGS, 75% SFC:25% SFGS, 50% SFC:50% SFGS, 25% SFC:75% SFGS, and 0% SFC:100% SFGS. Increasing the proportion of SFGS in the finishing diet increased (P<0.01) feed:gain for the overall experiment and resulted in a linear decrease (P<0.01) in calculated NE, NE, and ME values of the diet. No differences (P>0.10) were noted among treatments for carcass characteristics. In Exp. 2, 144 medium-framed beef steers (British × Continental) were used. Treatments were SFC fed from d 0 to end (Treatment 1), SFC fed from d 0 to 56 and SFGS fed from d 57 to end (Treatment 2), SFGS fed from d 0 to 56 and SFC fed from d 57 to end (Treatment 3), and SFGS fed from d 0 to end (Treatment 4). Experiments 1 and 2 were conducted concurrently, and steers on Treatments 1 and 4 were the same steers used in Exp. 1 and fed 100:0 and 0:100, respectively. Average daily gain was decreased (P<0.10), and feed:gain was increased (P<0.05) for the average of Treatments 2 and 3 vs Treatment 1 for the overall experiment. In vitro DM disapperance of diets used in Exp. 1 was similar (P>0.10) among treatments after 4, 12, 24, and 48 h of incubation. Results suggest no benefit from mixing SFC and SFGS in finishing diets, and switching grain sources during the finishing period may adversely affect performance.
KW - Beef Cattle
KW - Corn Grain
KW - Grain Sorghum
KW - Performance
KW - Steam Flaking
UR - http://www.scopus.com/inward/record.url?scp=85007524606&partnerID=8YFLogxK
U2 - 10.15232/S1080-7446(15)31551-5
DO - 10.15232/S1080-7446(15)31551-5
M3 - Article
AN - SCOPUS:85007524606
VL - 18
SP - 387
EP - 394
JO - Professional Animal Scientist
JF - Professional Animal Scientist
SN - 1080-7446
IS - 4
ER -