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Feeding Sugar Beet Byproducts to Cattle AS1365

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Feeding Sugar Beet Byproducts to Cattle AS1365 AS1365 (Revised) Feeding Sugar Beet Byproducts to Cattle Reviewed by variety of options to choose from in Sugar Beet Processing alternative feeds; however, the choice Greg Lardy To better understand the nutrient of those feeds depends on several NDSU Animal Sciences characteristics of sugar beet Department Head factors, including availability and byproducts, understanding the nutrient composition, as well as process that is used to extract storage and handling characteristics. sugar from sugar beets is important. The Red River Valley region of One possibility is to incorporate At the processing plant, foreign Minnesota and North Dakota, along sugar beet byproducts into the diet. material, small beets and leaves with the Yellowstone and Upper Beet byproducts are fed predominantly are removed from the beets prior to Missouri River Valley regions of in northeastern South Dakota, western processing. This material is known North Dakota and Montana, are Minnesota and eastern North Dakota, as “sugar beet tailings,” which important sugar beet-producing as well as western North Dakota and also is used as livestock feed. regions. In fact, Minnesota, North eastern Montana. This is due to the The sugar beets are sliced into long Dakota and Montana ranked 1, 3 availability and the perishable strips called cossettes. The cossettes and 5, respectively, in sugar beet nature of the wet byproducts. are cooked in hot water to remove the production in 2014. Together, these sugar. This process is called diffusion. three states produced more than The predominant byproducts fed in At the end of the diffusion process, 52 percent of the U.S. sugar beet crop this region are wet beet pulp and beet the hot water and sugar mixture is in 2014. Processing plants in these tailings. These products are high in further processed into bulk or bagged regions refine the sugar from the moisture (75 percent to 80 percent), sugar. The cossettes are conveyed to beets and produce large volumes of which limits storage life and the a pulp press, which squeezes some byproducts, which are useful feed distance they can be transported of the water from the pulp to facilitate ingredients for beef cattle producers. economically. transportation. Many producers are seeking Dried pulp and pelletized dried Pulp that will be marketed as dry alternative feeds to incorporate in pulp also are available to producers; shreds or pellets is conveyed to a their beef cattle diets, yet still meet these dried products contain about pulp dryer. The pulp dryer dries the the protein and energy requirements 10 percent moisture. In addition, pulp to approximately 10 percent of the animals. Producers have a molasses and desugared molasses also are available as a result of sugar moisture. After drying, the pulp beet processing. The purpose of usually is pelleted to facilitate this publication is to describe the storage and transportation. byproducts that are available and to Molasses is produced during the give feeding recommendations for refining process. The volume of each of the specific byproducts. molasses produced varies, but is typically about 4 percent to 5 percent January 2016 of the weight of the raw sugar beets. Molasses is separated from the juice a conventional mixer wagon to break Beet Pulp (which contains the sugar) through a up whole beets. In addition, some Beet pulp can be used effectively series of centrifugation steps. Molasses producers report success using as a supplement for gestating or contains 40 percent to 50 percent manure spreaders to spread whole lactating cows, as an ingredient residual sugar. Molasses usually is beets on stubble or stalk fields and in backgrounding diets or as a refined further through a process called allowing cows access to the beets on replacement for roughage in finishing molecular exclusion chromatography the field. Choking may be a potential diets. Beet pulp is relatively low to produce condensed separator problem when feeding whole beets. in crude protein (8 percent), but byproduct (CSB) or desugared Whole sugar beets also can be fed by relatively high in TDN (72 percent). molasses. This process removes a chopping in a tub grinder or forage portion of the residual sugar and harvester to reduce the risk of choking. Research conducted at NDSU concentrates the remaining nutrients. Some producers have noted success indicates that wet beet pulp can be by using a forage harvester to chop included at up to 40 percent of the the beets prior to feeding. diet (dry-matter, or DM, basis) in Nutrient Content, backgrounding diets (Table 2). Byproduct Descriptions Whole sugar beets can be chopped However, reductions in dry-matter and Storage and ensiled as a storage method. intake will occur at inclusions greater As with any ensiling process, than 20 percent of the diet. In finishing Recommendations good silage-making principles diets, wet beet pulp can be used as The nutrient content of a variety of should be employed. These principles the roughage source, having an sugar beet byproducts is shown in should include achieving the proper energy value greater than corn silage Table 1. The nutrient characteristics moisture level (typically 60 percent (Table 3). and feeding recommendations for to 65 percent moisture is required). each byproduct are discussed below. Since raw beets contain higher levels As a partial or complete roughage of moisture than is optimum for replacement, it can be included at Sugar Beets ensiling, the addition of a dry 5 percent to 15 percent of the diet in finishing rations (DM basis). Data Occasionally, processors must dispose ingredient is necessary to facilitate collected at NDSU indicates pressed of whole sugar beets due to spoilage optimum ensiling. beet pulp has 94 percent the energy or excessively large crops. Whole Depending on what class of livestock value of corn in backgrounding diets beets can be fed successfully to cattle. the silage will be fed to, dry ingredient and 86 percent the value of corn Whole beets are low in crude protein choices could include chopped forage, in finishing diets (Tables 2 and 3). (6.8 percent) but high in energy grain screenings or other byproducts. When wet beet pulp is fed at (75 percent to 81 percent total The sugar in the beets will provide 20 percent of the diet DM, cattle will digestible nutrients, or TDN). the fermentable carbohydrate consume 30 to 35 pounds of wet pulp, If possible, whole beets should be needed for successful fermentation. which would be less than 1 percent broken up prior to feeding. Producers The pile should be packed and of their body weight on a DM basis. can utilize extended mixing times with covered to exclude oxygen. Table 1. Nutrient composition of various sugar beet byproducts. Feedstuff DM CP1 TDN1 NEm1 NEg1 ADF1 Ca1 P1 Sugar Beet Tops 17.0 15.1 58.0 0.59 0.27 14.0 1.01 0.22 Sugar Beet Top Silage 21.0 12.7 53.0 0.55 0.20 18.0 1.56 0.20 Sugar Beet Tailings 18.4 8.9 65.0 0.67 0.40 34.0 2.35 0.27 Sugar Beet Tailing Silage 20.0 10.0 65.0 0.66 0.40 NG 2.50 0.20 Sugar Beet Top Silage 32.0 11.9 51.0 0.45 0.20 NG 1.56 0.22 Sugar Beet Pulp, Dried 90.0 9.1 72.0 0.77 0.49 31.0 0.72 0.20 Sugar Beet Pulp, Wet 25.1 9.1 72.0 0.77 0.49 31.0 0.72 0.20 Sugar Beets (Whole) 20.1 6.8 81.0 0.90 0.60 NG 0.24 0.24 Sugar Beet Molasses 77.0 10.0 75.0 0.77 0.50 0.0 0.12 0.03 Concentrated Separator Byproduct 66.0 20.0 67.0 0.75 0.42 0.0 0.05 0.03 1 All values listed are on a dry-matter basis. Abbreviations: DM = Dry Matter; CP = Crude Protein; TDN = Total Digestible Nutrients; NEm = Net Energy for Maintenance; NEg = Net Energy for Gain; ADF = Acid Detergent Fiber; Ca = Calcium; P = Phosphorus; NG=Not Given. Adapted from AS1182, “Alternative Feeds.” Table 2. Effect of increasing level of pressed beet pulp and Beet Tailings CSB in backgrounding rations on performance of steer calves Beet tailings consist of small beets, (Bauer et al., 2007). broken or damaged beets, soil and other foreign material not suitable for Pressed Beet Pulp to CSB Inclusion (% of Ration DM) sugar production. Tailings are high 0:0 20:0 40:0 0:10 20:10 40:10 in moisture (75 percent to 85 percent) ADG, lbs 3.98 3.39 3.12 3.67 3.50 3.17 and can be quite variable in nutrient DMI, lb/day 21.45 19.16 17.56 22.46 20.55 18.77 content. F:G 5.41 5.65 5.65 6.06 6.41 5.92 With low levels of soil contamination Apparent Dietary NE, Mcal/lb and foreign material, beet tailings Maintenance 0.91 0.89 0.90 0.89 0.86 0.86 Gain 0.61 0.59 0.60 0.54 0.59 0.57 have a feeding value similar to or slightly greater than corn silage on a dry-matter basis. However, high Table 3. Effect of increasing level of pressed beet pulp and levels of soil or foreign material will CSB in finishing rations on performance of steer calves reduce the energy content of tailings (Bauer et al., 2007). substantially. Choking may be a problem with beet tailings. Due to the Pressed Beet Pulp to CSB Inclusion (% of Ration DM) high moisture content, transportation 5:0 12.5:0 20:0 5:10 12.5:10 20:10 is a major expense with beet tailings.
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