Abstract
Corn distiller's dried grains with solubles (DDGS) is a completely new feed ingredient in the Korean feed market. There is an ever increasing need for the Korean feed industry to import and make the best of it as a high protein and high energy feed ingredient. A layer feeding trial was conducted for 10 weeks to investigate the effects of addition of light-colored DDGS to layer diets on laying performance, egg qualities and yolk fatty acid composition. Also, the economics of using DDGS in the Korean situation was analyzed. Nine hundred Hy-line Brown layers, 24 weeks of age, were employed in a feeding trial consisting of four dietary treatments (0, 10, 15, and 20% DDGS), and five replicates per treatment. All experimental diets were prepared as iso-protein (17%) and iso-calorie (TMEn 2,780 kcal/kg). The use of DDGS up to 20% in layer diets did not exert any influence on feed intake, laying rate, total egg mass, mean egg weight and feed conversion ratio (p>0.05). The color and breaking strength of eggshell, as well as the albumin height and Haugh unit were not affected by the addition of DDGS up to 20% in the diet. The yolk color was significantly increased by DDGS supplementation (p<0.05). As the DDGS level increased, the oleic acid content decreased, and the linoleic acid increased (p<0.05) in egg yolk. The degree of saturation of yolk fatty acids was not affected by DDGS supplementation. The inclusion of light-colored DDGS up to 20% in layer diets resulted in a decrease of feed cost per kg without any undesirable effect on laying performance. In conclusion, the light-colored DDGS (L* 56.65) could be used up to 20% in layer diets without any harmful effect on laying performance, and possibly provide economic benefits to the Korean poultry industry.
Highlights
Corn distiller’s dried grains with solubles (DDGS) is a byproduct obtained from the milling process of corn for ethanol production
Most of the DDGS produced in the United States has been consumed locally as a ruminant feed, and only about 10% of DDGS produced was shipped to foreign countries (Shurson, 2003)
Protein in DDGS can vary from 24-29% (Dale and Batal, 2005)
Summary
Corn distiller’s dried grains with solubles (DDGS) is a byproduct obtained from the milling process of corn for ethanol production. Increased emphasis on ethanol production in the United States has and will continue to increase the production of DDGS drastically (Shurson, 2003), resulting in the increased corn price in the global grain market, along with the prices of other grains with it. This will make the feed situation worse in Far Eastern countries, such as Japan, Taiwan, and South Korea, where most of the feed grains are imported. Our primary purpose was to evaluate the effects of feeding an elevated quantity of light-colored (high quality) DDGS in commercial laying hen rations, and on the economics in Korean situation
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