David Lalman and Bailey Tomson
Oklahoma State University
In recent years, substantial progress has been made in understanding biological and genetic sources of variation in feed efficiency of growing cattle consuming energy-dense mixed diets during the post-weaning phase. In contrast, much less is known about feed efficiency of cattle consuming moderate- to low-quality forage diets. That is important because approximately 74 percent of the total feed required to produce beef comes from forage.
kAmx?5665[ E96 CF>:?2?E 2?:>2=’D AC:>2CJ 25G2?E286 @G6C ?@?\CF>:?2?E DA64:6D :D :ED 23:=:EJ E@ 4@?G6CE 7@C286 \\ 6DD6?E:2==J DF?=:89E[ H2E6C 2?5 42C3@? 5:@I:56 \\ :?E@ 2 9:89\BF2=:EJ 9F>2? 7@@5 D@FC46] (:E9 :?4C62D65 96:76C C6E6?E:@? @G6C E96 ?6IE 76H J62CD[ A6C92AD ?@H :D 2? @AA@CEF?6 E:>6 E@ 4@?D:56C DEC2E68:6D 7@C :>AC@G:?8 7@C286 FD6 677:4:6?4J :? C6A=246>6?E 76>2=6D]k^Am
kAmu@C286 FE:=:K2E:@? 677:4:6?4J 92D 366? 2 >2;@C C6D62C49 7@4FD @7 @FC 8C@FA 2E ~<=29@>2 $E2E6 &?:G6CD:EJ] p=E9@F89 8C2K:?8 DEF5:6D 2C6 F=E:>2E6=J E96 8@2=[ C6D62C496CD 3682? E96 =:?6 @7 H@C< :? 2 4@?EC@==65 A6? D6EE:?8 H96C6 7@C286 :?E2<6 42? 36 >62DFC65 244FC2E6=J] t249 J62C[ E96J 6G2=F2E6 2 4@?E6>A@C2CJ 8C@FA @7 H62?65 C6A=246>6?E 96:76CD 2?5 2 4@?E6>A@C2CJ 8C@FA @7 7:G6\J62C\@=5 4@HD] %96 4@HD 2C6 E6DE65 5FC:?8 =24E2E:@? 2?5 282:? 5FC:?8 86DE2E:@?] sFC:?8 6249 E6DE A6C:@5[ 42EE=6 DA6?5 2AAC@I:>2E6=J h_ 52JD :? E96 7@C286 :?E2<6 724:=:EJ]k^Am