Part III Report on experiments on variation in nutrient composition and digestibility of DDGS (Distiller’s Dry Grains with Solubles)

The parties involved in trading feed grains and other feed materials are normally aware of the relationships of the difference of their external appearance with their nutrient composition and usefulness. Several reports are available on nutrient composition of DDGS and its nutritional evaluation in different animal species. Some manufacturers and the University of Minnesota have published data on variation in the nutrient composition of DDGS. There are, however, very few reports on the relationships between the external appearance of DDGS and its nutrient composition, digestibility, etc. Indices for evaluating the nutritional value of DDGS at the time of its purchase have not been established. We therefore analyzed the nutrient composition and digestibility of different DDGS samples and examined their variation. Among the properties such as color, smell, shape, etc that humans can perceive, we selected color, which is relatively easy to assign objective values to, and studied the relationships of the color of DDGS with its nutrient composition and digestibility.