Nutrient Characteristics and Glycoalkaloid Content of Potato Distiller Byproducts

Nine potato distiller byproducts were analyzed for nutrient composition. Estimates of feeding value to livestock were determined. Proximate analyses of the byproducts showed all the products to have a fair amount of crude protein, but amino acid determination revealed a large portion of the crude protein to consist of nonprotein nitrogen. The products were good sources of lysine and methionine. The products were high in ash content, which would limit their potential feeding value. The carbohydrate portion of the byproducts was highly available as determined by proximate analyses and digestibility studies. Estimates of net energy for lactation were found to be comparable to other distiller byproducts, but the determination of true feeding value must await feeding trials to determine palatability and productivity. The glycoalkaloid content of the byproducts raises concern of the products palatability to livestock.