Browsing by Subject "Beef cattle -- Feed utilization efficiency"
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Item Effect of breed type and grazing performance on feedlot and carcass traits in cattle(Texas Tech University, 2002-08) Cleere, Jason JamesNot availableItem Effects of high oil corn on carcass characteristics, fatty acid profiles, beef palatability, and shelf life traits of beef top loin steaks(Texas Tech University, 2000-12) Price, Bradley DonRecent development of com having greater oil content offers the opportunity for added benefit to carcass and palatability characteristics of beef. The objective of this study was to determine if feeding high oil com to finishing feedlot steers had an added benefit as compared to normal mill run corn plus added fat. One hundred twenty Angus steers were assigned randomly to either Normal or High Oil treatments. Pens (12 pens per treatment with five steers per pen) were assigned randomly to one of the following dietary treatments: (1) normal based diet (NMR) of mill-run steamflaked corn plus added fat, (2) high oil diet (HOC) based on high oil steamflaked corn. On the morning of d 165, 117 of the original 120 steers were shipped to a commercial packing facility. At 48 h postmortem, carcass data was collected on all carcasses. Carcasses were then randomly selected (2 carcasses from each pen) and 180A strip loins were collected. One steak was removed for retail display at d 14. Two steaks (2.5 cm thick) were removed from each strip loin for sensory panel analysis and Wamer-Bratzler Shear Force determination after 14-d aging. No treatment differences were observed (P > .05) between fat thickness, ribeye area, KPH, hot carcass weight, yield grade, and skeletal and lean maturities. Marbling scores and quality grades were higher (P < .05) for NMR than HOC. Overall 88% of the NMR steers graded Choice compared to the 84% for HOC. Sensory traits as well as Warner-Bratzler Shear Force determinations did not differ (P > .05). No significant differences were determined for purge loss, fat and moisture percentages, nor fatty acid analysis with the exception of linoleic acid. HOC had a higher level (P < .05) of linoleic acid than did NMR. Feeding high oil com failed to improve carcass quality, palatability, and conjugated linoleic acid levels.Item Effects of Roughages on High Concentrate Rations for Beef Cattle(Texas Tech University, 1971-12) Key, John CNot Available.Item Effects of sorghum distiller's grains on performance and carcass characteristics of cattle fed steam flaked corn based diets(Texas Tech University, 2004-12) Lemon, Kurt ATwo hundred crossbred beef steers (initial body weight = 404.5 ± 16.7 kg) were used to determine the effects of graded levels of wet sorghum distiller's grain and one level of wet com distiller's grain included in steam-flaked corn-based diets of finishing beef steers on performance and carcass characteristics. The five dietary treatments (dry matter basis) included: 1) a standard finishing diet (CON); 2) a diet containing 5% wet sorghum distiller's grain replacing steam-flaked com (5%); 3) a diet with 10% wet sorghum distiller's grain (10%); 4) a diet containing 15% wet sorghum distiller's grain (15%); and 5) a diet with 10% wet corn distiller's grain (C10%) replacing steam-flaked com. Cattle were on feed for an average of 133 d. A randomized complete block design was used with pen as the experimental unit (eight pens per treatment). There was a tendency for a linear decrease in dry matter intake (DMI; P = 0.15) for the overall feeding period as the level of sorghum distiller's grain increased in the diet. In addition, cattle fed the C10% diet tended to consume less DM than those fed the 15% {P = 0.10). A linear decrease in overall average daily gain (ADG; P = 0.01) was noted for cattle fed increasing quantities of sorghum distiller's grain, and this effect was more evident when ADG was adjusted to a common dressing percent (carcass-adjusted ADG; P = 0.001). Feed efficiency, expressed as feed:gain ratio (F:G) followed the same trend (P = 0.12) as overall ADG, as did the carcass-adjusted F:G (P = 0.001). Hot carcass weight and longissimus muscle area decreased linearly (P = 0.009) as the concentration of sorghum distiller's grain increased in the diet. Yield grade increased linearly (P = 0.09) with increasing sorghum distiller's grain level. Steers fed the C10% treatment decreased fat thickness at the 12'*^ rib interface, and kidney, pelvic, and heart fat (P < 0.04) than with the 10% sorghum distillers grain diet. There were no effects on dressing percent, marbling, number of carcasses grading Choice, or the number of liver abscess (P > 0.26). Because of conflicting data from previous research conducted primarily with dry-rolled com-based diets, further research is needed to confirm the lack of response noted in the present study from the replacement of steam-flaked com with wet distiller's grains in the diets of finishing beef cattle.Item Estimating the extracellular water component of total body water in beef cattle using sodium thiosulfate(Texas Tech University, 1988-12) Ross, James GlennNot available