NDSU Beef Feedlot - NDSU Agriculture - North Dakota State ...

More documents

Recommendations

Info

Table 3. Carcass traits of cattle fed mixed coproduct protein supplement at increasing levels. Percent Co-Product supplement Contrasts Item 0% 5% 10% 15% Std. Error P-Value CPS vs. no CPS linear quadratic Hot Carcass Wt., lbs. 789.2 820.8 794.2 806.5 25.09 0.31 0.23 0.65 0.46 Dressing Percent 63.25 64.18 63.26 63.95 0.38 0.39 0.11 0.32 0.26 Back Fat, in 0.40 0.46 0.37 0.42 0.03 0.02 0.78 0.47 0.59 Ribeye Area, sq in 13.50 13.62 13.62 13.71 0.27 0.85 0.47 0.43 0.93 Kidney Pelvic Heart, % 2.43 2.43 2.44 2.42 0.02 0.94 0.94 0.75 0.66 USDA Yield Grade* 2.66 2.90 2.51 2.71 0.10 0.07 0.67 0.50 0.84 Marbling Score** 421.8 434.9 445.7 438.9 16.04 0.79 0.36 0.41 0.56 Percent Choice*** 61.36 67.44 76.74 77.27 - - - - - * USDA Yield Grade is a calculated value that is determined by a formula comparing fat to lean muscle in the carcass. ** Marbling score is based on intermuscular fat in the ribeye: 400-499 = low Choice , 500-599 = Avg Choice. *** Percent choice was not statisitically analyzed. Implications The results of this study suggest that a mixed co-product ―superfeed‖ may be successfully marketed based on animal performance and especially based on percentage of USDA Choice carcasses. The ease of use, safety, and handling properties of this pelleted commodity are superior to any single feed ingredient. Using soybean meal as a base ingredient helps increase the value of the meal and diversify the market potential to other species or production scenarios. This study gives confidence to livestock producers interested in using a combinatorial feed comprised of multiple co-products. It remains to be seen if feed manufacturing businesses are interested in developing commodities from combining coproducts into commercial pelleted feeds to produce products that can be labeled as North Dakota ―Superfeed.‖ Effects of Dried Distillers Grains With Solubles on Growing and Finishing Steer Intake, Performance, Carcass Characteristics, Color and Sensory Attributes J.L. Leupp 1 , G.P. Lardy 1 , M.L. Bauer 1 , K.K. Karges 2 , M.L. Gibson 2 , J.S. Caton 1 and R.J. Maddock 1 1 NDSU Department of Animal Sciences 2 Dakota Gold Research Association, Sioux Falls, SD The objectives of this study were to determine the effects of dried distillers grains with solubles on growing and finishing performance, carcass characteristics and meat quality traits. These data suggest dried distillers grains with solubles (DDGS) can be included at 30 percent dietary dry matter (DM) in both the growing and finishing period, partially replacing dry-rolled corn, with no detrimental effects on performance, carcass characteristics or sensory attributes, although DDGS may affect color negatively. Summary Seventy-two crossbred and purebred beef steers (653 ± 20 pounds initial body weight [BW]) were used in a completely randomized design to determine effects of dried distillers grains with solubles (29.2% crude protein [CP], 9.7% fat, DM basis; DDGS) on growing and finishing steer intake, performance, carcass and meat quality traits. The study contained two feeding periods, growing and finishing, which resulted in four treatments: 0:0, 30:0, 0:30 and 30:30 (diet DDGS percentage fed during growing and Page 18 2009 NDSU Beef Feedlot Research Report
finishing periods, respectively). Steers were fed individually a growing diet (65% concentrate) for 57 days then acclimated to and fed a finishing diet (90% concentrate) for 80 or 145 days. Dietary ingredients included dry-rolled corn, corn silage, grass hay, concentrated separator byproduct and supplement. During the growing period, dry-matter intake (DMI) was not different (P ≥ 0.63). Steer performance, including average daily gain (ADG) and gain:feed (G:F), were not affected (P ≥ 0.14) by treatment during the growing period and final BW at the end of the growing period was not different (P = 0.99). During the finishing period, DMI, ADG and G:F were not different (P ≥ 0.22). As a result, final BW was not different (P ≥ 0.28). Carcass traits (ribeye area; 12th rib fat; kidney, pelvic and heart fat (KPH); yield grade; and marbling) were not different (P ≥ 0.16). Results from the trained panel indicated no differences (P ≥ 0.16) in tenderness; however, steaks from steers fed 30% DDGS during the finishing period tended (P = 0.10) to be juicier and more flavorful than steaks from control steers. Inclusion of 30% DDGS in the growing period tended to lower L (muscle lightness) (P = 0.08) and lowered B (muscle yellowness) (P = 0.01) of steaks. Overall feeding of DDGS lowered B (P = 0.02) compared with feeding dry-rolled corn (0:0). Feeding DDGS during the finishing period lowered A (muscle redness) (P < 0.001) of steaks. Furthermore, overall feeding of DDGS lowered A (P < 0.001) compared with feeding dry-rolled corn (0:0). Feeding 30% DDGS did not impact any performance or carcass characteristics but did influence steak sensory attributes and color. Introduction Dried distillers grains with solubles can be used as a protein and energy source depending on the amount included in the diet (Ham et al., 1994). Feeding up to 40% wet or dry distillers grains in growing and finishing diets improves ADG and G:F in steers compared with feeding dry-rolled corn only (Ham et al., 1994). Beef consumers want a high-quality product that is tender, juicy and flavorful. Research is limited in evaluating effects of feeding DDGS to growing and finishing steers on meat quality. Roeber et al. (2005) fed finishing Holstein steers up to 50% dried distillers grains (DDG) and reported no differences in tenderness or sensory traits compared with corn-based diets. Little quantitative information is available on the effects of short- and long-term feeding of DDGS to steers on performance and carcass quality. Therefore, our objectives were to determine the effects of DDGS on growing and finishing steer intake, performance, carcass characteristics, color and sensory attributes. Materials and Methods Seventy-two crossbred and purebred beef steers were used in a completely randomized design. The study contained two feeding periods, growing and finishing, which resulted in four treatments: 0:0, 30:0, 0:30 and 30:30 (diet DDGS percentage fed during growing and finishing periods, respectively). Steers were fed individually a growing diet (65% concentrate) for 57 days then acclimated for 14 days to a finishing diet (90% concentrate) and fed for 80 or 145 days. Diets were based on dry-rolled corn, corn silage, grass hay, concentrated separator byproduct and supplement (Table 1). Diets included 27.5 parts per million (ppm) of Rumensin and 11 ppm of Tylan and were formulated to contain a minimum of 12.5 percent CP, 0.70 percent calcium (Ca) and 0.30 percent phosphorus (P). Page 19 2009 NDSU Beef Feedlot Research Report
Page 1: Carrington Research Extension Cente
Page 4 and 5: Contact Information If you have que
Page 6 and 7: Table of Contents Feedlot Schools A
Page 8 and 9: 6. Grain processing, mixing rations
Page 10 and 11: Table 1. Supplements with and witho
Page 12 and 13: Table 3. Performance of feeder catt
Page 14 and 15: uminal gas cap H2S concentration an
Page 16 and 17: Table 3. Influence of thiamin and s
Page 18 and 19: Table 1. Rations for steers fed inc
Page 22 and 23: Table 1. Formulated dietary composi
Page 24 and 25: Table 2. Performance and carcass ch
Page 26 and 27: Effect of Glycerol Level in Feedlot
Page 28 and 29: Receiving Trial Fall 2008 One hundr
Page 30 and 31: Table 3. Heifer body weight average
Page 32 and 33: Impact of Weaning Date on Calf Grow
Page 34 and 35: a 24-hour chill, qualified universi
Page 36 and 37: By design, weaning dates influenced
Page 38 and 39: Thompson, M. M., C. S. Schauer, V.
Page 40 and 41: Diets were formulated to provide re
Page 42 and 43: Marbling number approached signific
Page 44 and 45: Table 1. Finishing ration with 20%
Page 46 and 47: Table 3. Carcass performance of cal
Page 48 and 49: The number of cattle consigned was
Page 50 and 51: The highest combined index score pe
Page 52 and 53: Table 1 Forage Crop Production 2006
Page 54 and 55: Off-quality commodities such as sun
Page 56 and 57: positive aspects of an enterprise a
Page 58 and 59: NDSU BBQ Boot Camps 2009 Celebratin
Page 60: NDSU is an equal opportunity instit

NDSU Beef Feedlot - NDSU Agriculture - North Dakota State ...

Create successful ePaper yourself

Delete template?

Save as template?