Nutritional Value of 1,2-Dichloroethane Extracted Fish Protein Cencentrate for Young Calves Fed Milk Replacer Diets

Abstract Reasons for poor growth of calves fed milk replacers containing l,2-dichloroethane-extracted fish protein concentrate (DCE-FPC) were investigated in three trials of 58 Holstein calves which were fed experimental replacers as the only diet for 8 weeks starting at 3 to 7 days of age. In all comparisons, DCE-FPC was inferior to dried skimmilk as the only protein source in replacers, but DCE-FPC was superior to isopropanol-extracted FPC. Methionine addition to a replacer containing DCE-FPC did not increase calf growth. Known contaminants of DCEFPC (DCE and ehlorocholine chloride) were added to dried skimmilk rations at levels comparable to their presence in DCE-FPC with no marked effect on calf performance. Further extraction of DCE-FPC with ethanol slightly increased gains whereas water washing resulted in poorer growth (P

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