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Effect Of Implant Strategies On Feedlot Performance And Carcass Traits Of Steers, R. H. Pritchard
Effect Of Implant Strategies On Feedlot Performance And Carcass Traits Of Steers, R. H. Pritchard
South Dakota Beef Report, 1994
The role of implant selection on feedlot performance and carcass traits was evaluated in 200 yearling steers. The steers (initial body weight 709 Ib) were implanted on day 1 or day 70 of the 140-day experiment. Implant combinations (day 1 /day 70) included none/none, Synovex-S + Finaplix-S/Synovex-S + Finaplix-S, Ralgro (36 mg)/Revalor, Synovex-S/Revalor, and Ralgro (72 mg)/Revalor. Day 1 implants increased (P < .05) average daily gain and reduced feed/gain through 70 days on feed. During the 71- to 140-day period implanted cattle exhibited higher (P<.05) average daily gain and lower (P<.05) feed/gain than nonimplanted steers. Specific implant combinations were all of comparable value. Implants increased (P< .05) carcass weights by 55 Ib over nonimplanted steers and increased (P< .05) rib eye area 1 in'. Rib fat thickness and rib eye area/cwt carcass were not affected by implanting. The percentage of choice grade carcasses was reduced (P<.05) from 82.5% to 62.3% by implanting. There were no appreciable differences in carcass traits attributable to specific implant combinations.
Effect Of Yeast Culture Product (Yea-Sacc) On Feedlot Performance Of Yearling Cattle Fed A High Concentrate Finishing Diet, C. P. Birkelo, R. K. Berg
Effect Of Yeast Culture Product (Yea-Sacc) On Feedlot Performance Of Yearling Cattle Fed A High Concentrate Finishing Diet, C. P. Birkelo, R. K. Berg
South Dakota Beef Report, 1994
The objective of this study was to determine if yeast culture (Yea-Sacc, Alltech, Inc., USA) affects feedlot performance and carcass characteristics of yearling steers fed a corn-based finishing diet containing less than 10% roughage. Crossbred yearlings (1 08 steers, avg 874 Ib) were fed a rolled corn diet (8.44% ground alfalfa hay) without (CON) or with Yea-Sacc (YS, 9 g per head per day) for 95 days. Final weights were 15 1b greater (P < .07) for YS steers than CON as a result of a 12.3% increase in daily gain between day 29 and day 57 (P<.03). Daily gains were 4.1 % greater for YS-fed steers overall (P<.07). Dry matter intake was not affected by treatment (P> .20). Feed efficiency tended to be improved for YS steers between day 29 and day 57 (P< .1 1) but did not differ at other times or overall (P> .20). Treatment increased carcass weights by 13 1b (P …
Effect Of Supplement Crude Protein Source And Dietary Crude Protein Levels On Feedlot Performance Of Yearling Steers, R. H. Pritchard
Effect Of Supplement Crude Protein Source And Dietary Crude Protein Levels On Feedlot Performance Of Yearling Steers, R. H. Pritchard
South Dakota Beef Report, 1994
The effect of crude protein level and source on production rates of yearling steers was evaluated during an 88-day finishing period. The overall average daily gain of 240 steers implanted with Revalor was 4.35 Ib. Diets were formulated to contain 1 1.25 and 13.5% crude protein. Protein sources included urea, soybean meal, an isonitrogenous blend of blood mealcorn gluten meal (BM-CGM) and dried distillers grains with solubles (DDGS). Increasing dietary crude protein from 11.5 to 13.3% with all urea supplements depressed (P<.05) dry matter intake without compromising average daily gain or feed efficiency. Feeding soybean meal in 1 1 .I % crude protein diets improved the energetic efficiency of steers. The BM-CGM supplement depressed (P<.051 dry matter intake and average daily gain when compared to the 11.5% crude protein soybean meal diet. The 13.6% crude protein diet containing 11 % DDGS and urea supported performance comparable to the 11.1 % soybean meal diet at a lower cost.