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Comparative Assessment of the Nutrition Values of Dehydrated Distillers' Grains and Dehydrated Vinegar Lees by in Situ Nylon Bag and in Vitro Gas Production Techniques

BO Yu-kun1,YANG Hong-jian1,WANG Wen-xi1,LIU Hua2,WANG Rui2 (1.College of Animal Science and Technology,China Agricultural University,Beijing 100193,China; 2.College of Animal Science and Technology,Xinjiang Agricultural University,Urumqi 830052,China)  
The in situ nylon bag technique and in vitro gas production technique were adapted in this research to evaluate and compare dehydrated distillers' grains and dehydrated vinegars lees in nutritive composition,ME,rumen degradation and in situ kinetic degradation parameters.It was found that the CP content of dehydrated distillers' grains was 154.3 3.4 g g/kg DM,its ME value was 6.73 0.29 kJ/kg DM and ED of its CP was 0.36 0.02;the CP content of dehydrated vinegars lees was 50.1 2.0 g/kg DM,its ME value was 5.75 0.03 kJ/kg DM and ED of its CP was 0.12 0.01.Though the content of EE,fiber and calcium in dehydrated vinegars lees were significantly higher than those of dehydrated distillers' grains(P0.05),dehydrated distillers' grains had higher CP content,ME,and ruminal degradability of DM and CP(P0.05).Thus,it is concluded that both of dehydrated distillers' grains and dehydrated vinegars lees have higher NDFD and ADFD than commen feedstuff,are potential post-rumen potein source and dehydrated distillers' grains has a better nutrition evaluation generally than dehydrated vinegars lees.
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