The economic advantages of processing on feed value of alternative ingredients for turkeys

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The animal industry remains an important part of recycling nutrients in the food chain by converting material not consumed directly by humans into high quality food. An example is the recycling, as feed for animals, of co-products derived from processing wheat and canola for biofuel. This project is designed to add value to these co-products that will contribute to the processing industry's ability to remain competitive and also improve the economics of the animal industry by improving feed value. The present proposal will assess the nutritional value of co-products, in turkey diets, of the two most common biofuels produced in Canada, ethanol and biodiesel. Specifically the focus will be on wheat dried distillers grains with soluble (DDGS), high protein canola isolates and crude glycerol. In Western Canada wheat is the main cereal used in ethanol production; however, our understanding of the nutritional value of DDGS is limited, in particular relative to the impact of using enzymes and/or processing to improve nutritional value of DDGS. A portion of the Canada's large canola crop is used in production of biodiesel, co-products of this industry are both canola meal (e.g. protein isolates (high protein)) and glycerol (high energy). For optimal feed formulation, we must have accurate information on the availability (digestibility and limits to intake/ inclusion level (e.g. due to levels of antinutritional factors such as fibre or phytates)) of nutrients of the various co-products. As commercial turkey diets are pelleted it is also important to understand the interaction between co-product source (and level of inclusion) and the various processing conditions employed during pelleting on pellet quality. In addition it is of interest to understand if processing of a product with lower amino acid digestibility (wheat DDGS) can increase the value of the co-products to the animal industry by improving the availability and consistency of nutrient availability. If the amino acid utilization can be improved by processing and/or enzymes then feed value is increased, and excretion of undigested nitrogen reduced.