Effects Of Different DDGS Levels Diets On Production Performance,Egg Quality And Nutrient Metabolic Rate Of Laying Hens

This experiment was conducted to study effect of dietary corn distillers dried drains with DDGS level on laying performance,egg quality and nutrient digestibility.Five hundhunrdred 32-week-old Lohamnn laying hens with a similar laying rate and body weight were assigned to 5 groups with 5 replicates in each group and 20 hens per replicate.Experimental diets contained 0(control group),5%,10%,15%,20%DDGS.The experiment lasted 6 weeks.Resuts showed as follows:The Laying rate and egg weight of 20% DDGS group was significantly lower than other groups(P<0.05).The egg weight of 15% DDGS group was significantly lower than control,5% and 10% DDGS groups.Compared with the control group,corn DDGS significantly increased yolk color(P<0.05).The yolk color of 15% and 20% DDGS groups were higher than other groups,significant(P<0.05).The DDGS level has no harmful effects on Haugh unit,egg shape index and eggshell thickness(P>0.05).In addition,Crude protein digestibility of 20% DDGS group was significantly lower than other group.Economic benefit analysis show:Compared with the control group,10% and 15%DDGS group were increased 4.1 an 3.2 RMB per thousand birds per day.Comprehensive consideration of economic benefit and laying performance,DDGS appropriate levels of laying hens between 10% and 15%;In special cases,the laying of dietary DDGS added in an amount of 20% of goods with better performance,but the performance will be affected.