Feed Lot

JUN 2018

Feedlots and cow/calf operations in the beef industry who feed 500 or more has annually on grains and concentrates; maintain 500 or more beef cows; backgrounder, stocker/grower, preconditioner; veterinarian, nutritionist, consultant

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FEED•LOT June 2018 23 performance. Often times, in years of drought many farmers have corn that does not produce a significant yield, making silage an economical option to salvage a low yielding crop. Drought damaged corn silage is variable in value warranting a feed analysis; however, typically it ranges 85-95% the energy value and slightly higher protein values (0.5 to 1.0%) of normal corn silage. In times when feed and forage prices get high, producers often cut additives and supplements from their feed programs; however, this is typically when technology will give the highest return on your in- vestment. Adding an ionophore to your mineral program can help to maximize feed efficiency (4-8% im- provement) leading to substantial saving in times of high hay prices. Work with your nutritionist to get alternative feeds analyzed and help determine their value in your op- eration. The bottom line is that no matter which alternative feed is uti- lized, the ration must be balanced to meet the nutrient requirements of the animal and economic goals of the producer. FL For more information on this topic or to visit with one of our nutritionists, visit www.gplc-inc.com. order to maximize cost per unit of energy; however, there is a fine line in how low we can push roughage inclusion while still minimizing the incidence of acidosis. The greatest driver in why roughage is needed in feedlot rations is the starch from the grain component of the ration. The minimal amount of forage needed is variable depending on the other ingredients included in the ration. An example would be processing method of the grain in the ration. Less roughage is need- ed in a ration containing whole corn as compared to a ration that has steam flaked corn. The opti- mal roughage level in a ration to maximize cost while maintaining rumen integrity is a balancing act between the ration composition (roughage source, grain type, rate of starch digestion, protein type, feed additives) and external factors (DMI, bunk management, weather, animal health, animal type). There are many factors to consider when determining the minimum NDF concentration needed in a finishing ration. Research helps producers and nutritionists bridge the gap and make science-based decisions. Researchers showed that feed- ing steers a roughage source with a larger particle size at a lower inclusion ( 5 %) in the ration had similar results to feeding a rough- age with a smaller particle size at a greater inclusion (10%), with no negative impacts on animal perfor- mance or digestibility (Gentry et al., 2016). In a study conducted at the University of Nebraska-Lincoln by Benton et al. (2015), steers were fed either alfalfa hay, corn silage, or corn stalks at two inclusion levels ( 4 or 6 %). Corn silage and corn stalks inclusion in the ration was determined by NDF content of the forages. Corn silage and corn stalks matched the NDF content of the alfalfa at both 4 and 6% inclusion. Results suggest that, regardless of roughage source, cattle fed a greater roughage inclusion ( 6 %) had greater (P < 0 . 04 ) DMI and ADG compared to steers fed the lower roughage inclusion ( 4 %). Cattle fed no roughage tended to have the lowest (P ≤ 0 . 06 ) final BW and ADG while having reduced (P < 0 . 01 ) DMI compared to steers fed 4 or 6% roughage likely due to acidosis. Utilizing poor quality forages can be a viable option for feedlot pro- ducers. In the feedlot, alternative forages such as crop residues can be utilized at 20 to 30% inclusion in a growing ration and 5 to 7% in a fin- ishing ration with no detriment to Specializing In: • Turn-Key Feedyard Construction • Hog Site Construction • Complete Dairy Construction • Sprinkler System • C AD Design • GPS S urvey • Slipform Concrete Feedbunks • Dirtwork o f All Ty pes • Laser-Equipped Machinery • All types of Fencing Phone: 800-536-2634 maxjantzexcavating.com

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