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Effect Of Previous Growing Program On The Benefits Of Restricting Feed Intake During The Finishing Phase, J.J. Wagner
Effect Of Previous Growing Program On The Benefits Of Restricting Feed Intake During The Finishing Phase, J.J. Wagner
South Dakota Beef Report, 1988
Eight pens of cattle that had been limit-fed a high energy growing diet and eight pens that had been full - fed a high roughage growing diet were fed either ad libitum amounts of a finishing diet or 93% of ad libitum for the first 70 days of the finishing phase. From day 71 through slaughter, all cattle received ad libitum amounts of the finishing diet. Interactions between previous growing program and level of feed intake during the finishing phase were significant (P<.05). Restricting the intake of finishing cattle that had been grown using a limit-fed, high energy diet resulted in improved (P<.05) feedlot performance (3.58 vs 3.28 lb per head daily average daily gain, respectively) and efficiency (6.18 vs 7.11, respectively) over the ad libitum fed cattle. For the cattle that had been grown using a high roughage program, restricting the intake of finishing cattle resulted in poorer (P<.07) performance (2.83 vs 3.16 lb per head daily, respectively) and efficiency (7.88 vs 7.19, respectively) compared with the ad libitum fed cattle. Whether or not cattle respond to restricted intake finishing regimens may be dependent upon level of dry matter intake, dietary energy density or rate of gain during previous growing program.
Effect Of Limit Feeding High Energy Growing In The Efficiency Of Metabolizable Energy Utilization, J.J. Wagner
Effect Of Limit Feeding High Energy Growing In The Efficiency Of Metabolizable Energy Utilization, J.J. Wagner
South Dakota Beef Report, 1988
One hundred twenty-eight Angus steer calves were utilized in a study to examine the effect of limit feeding on efficiency of metabolizable energy (ME) utilization during the grouping phase and subsequent performance during the finishing phase. Steers limit-fed a high concentrate diet exhibited more rapid d a i l y gains than steers full -fed the same amount of energy from a high roughage diet (2.15 vs 1.74 lb per head, respectively). Feed conversion was improved by limit feeding compared with full feeding (6.09 vs 10.19, respectively). The efficiency of ME utilization was also improved. Limit - fed steers gained …
High-Moisture Ear Corn And Corn Silage In Backgrounding Cattle Diets, M.L. Sip, R.H. Pritchard, M.A. Robbins
High-Moisture Ear Corn And Corn Silage In Backgrounding Cattle Diets, M.L. Sip, R.H. Pritchard, M.A. Robbins
South Dakota Beef Report, 1988
One hundred ninety-two Angus x Limousin steer calves (560 lb) were used in an 85-day backgrounding trial. Dietary crude protein levels of 90, 100, 110 and 120% of the NRC factorial equation recommendation were used within ad libitum-fed corn silage diets (CS) arid limit-fed chopped high-moisture ear corn (HMEC) diets. The objective was to determine if optimum dietary crude protein levels differed between these two basal diets when fed at similar levels of a net energy of gain. By design of the experiment, daily dry matter intake of HMEC diets was lower than CS diets (P<.001). ADG was similar across basal diets and feed conversion was improved (P<.001) with HMEC diets. Dietary crude protein level did not affect ADG. Quadratic decreases in the protein efficiency ratio occurred as dietary crude protein Level increased (P<.01). Plasma urea N (PUN) levels were higher in calves fed HMEC diets (P<.05) arid increased quadratically with increasing dietary crude protein level on day 56 (P<.05). This study suggests the NRC factorial equation estimates the gram daily crude protein requirement and can be used without modification to predict dietary crude protein needs of limit-fed feeder calves.