Study on Energy,Protein and Amino Acid Utilization of Corn DDGS by Cherry Valley Male Ducks
[Objective]To explore the utilization of energy,protein and amino acid of the corn DDGS from 5 regions for Cherry Valley male ducks.[Method]Ninety-eight healthy Cherry Valley male ducks with a body weight of 3.25 kg±0.25 kg at 18 weeks of age were cultivated in metabolic cages,one duck one cage.They were randomly divided into 7 groups comprised of 14 individuals and 1 per replicate.The ducks in 5 experimental groups were fed the diets with corn DDGS and corn starch at a ratio of 7∶3,and the DDGS were sourced from Jilin,the United States(crude),the United States(fine),Shandong and Liaoning,respectively.The ducks in corn starch group were fed on the 100％corn starch diet,while in endogenous group was fed nothing.According to the process of force-feeding,both force-feeding test and metabolic test were carried out,with all the excrement collected.Moreover,gross energy(GE),crude protein(CP)and the amino acid content of force-feeding feed and excreta were determined.[Result]The CP content of corn DDGS sourced from Liaoning was significantly lower compared to the other 4 experimental groups(P＜0.05),while the CP content of crude and fine corn DDGS sourced from the United States was significantly lower relative to the Jilin group(P＜0.05).The GE of DDGS from the United States(crude)was significantly lower compared to the other 4 experimental groups(P＜0.05).The apparently available protein and truly available protein in the United States(fine)and Liaoning groups were significantly higher than those from the United States(crude)and Shandong groups(P＜0.05).The apparently metabolizable energy and truly metabolizable energy in the United States(crude)and Liaoning groups were significantly higher than in Jilin and Shandong groups(P＜0.05).The true availability of threonine,glycine,histidine,arginine,branch chain amino acid,phenylalanine and tyrosine of corn DDGS from Liaoning was significantly higher compared to the other 4 experimental groups(P＜0.05),and the true availability rates of proline,aspartic acid,serine,glutamic acid and alanine were the highest.[Conclusion]There were significant differences observed in nutritional composition,energy,protein and amino acid utilization of corn DDGS among 5 different regions.The utilization of energy,protein and amino acid by Cherry Valley male ducks was in the following order:Liaoning＞United States(fine)＞United States(crude)＞Jilin＞Shandong.The crude protein content of corn DDGS in five different regions was ranked as Shandong＞Jilin＞United States(crude)＞United States(fine)＞Liaoning.
corn DDGSCherry Valley male ducksavailable proteinmetabolizable energytrue availability of amino acids
万方数据
维普
