The effect of DDGS diet on the growth performance,serum biochemical indicators,and rumen fermentation parameters of mutton sheep
Objective:This experiment aims to investigate the effects of DDGS diet on the growth performance,serum biochemical indicators,and rumen fermentation parameters of mutton sheep.Method:Eighty fattening Hu sheep with similar initial weights(23.38±1.15kg)were randomly divided into four groups,with 20 mutton sheep in each group.The control group was fed a basic diet according to the"Sheep Feeding Standards",while the other three groups were fed experimental diets containing 10%,20%,and 30%DDGS,respectively.Result:Compared with the control group,1)After feeding the experimental diet containing 10%DDGS,ADG significantly increased by 8.22%(P＜0.05),and F/G significantly decreased by 7.15%(P＜0.05);After feeding the experimental diet containing 20%DDGS,ADG significantly increased by 8.71%(P＜0.05),and F/G significantly decreased by 7.43%(P＜0.05).2)After feeding the experimental diet containing 30%DDGS,the serum total protein and cholesterol levels were significantly reduced(P＜0.05).3)After feeding the experimental diet containing 30%DDGS,a significant decrease in rumen acetic acid concentration(P＜0.05),a significant increase in propionic acid concentration(P＜0.05),and a significant decrease in the acetic acid/propionic acid ratio(P＜0.05).Conclusion:With the increase of DDGS addition in the diet,the growth performance of mutton sheep first increases and then decreases,and high addition of DDGS is prone to negative effects on serum biochemical indicators and rumen fermentation parameters of mutton sheep.Therefore,the appropriate amount of DDGS added to the diet of mutton sheep is 20%.
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