Bioavailability Evaluation of Guizhou Characteristic Protein Feedstuffs in Terminal Ileum and Adaptability of Soybean Meal Reduction and Replacement
[Objective]The nutrient bioavailability of Guizhou characteristic protein feedstuffs in growing pigs was evaluated,which provided the scientific basis for the rational utilization of protein materials reducing or replacing the soybean meal in pig diet and decreasing the feed cost.[Method]Six pigs successfully completed rectal anastomosis and duodenal"T"fistula operation were randomly divided into 2 groups with 3 pigs per group.Each pig was used as a replicate and fed in a single cage.The bioavailability in terminal ileum of seven Guizhou characteristic protein feedstuffs,including fish meal,soybean meal,double low rapeseed meal,soybean,common rapeseed meal,DDGS(distillers dried grains with solubles)and cottonseed meal,was evaluated by mobile nylon bag method.[Result]The CP(crude protein),OM(organic matter),EE(ether extract),Ca,P and CF(crude fiber)apparent digestibility in terminal ileum of seven Guizhou characteristic protein feedstuffs of fish meal,soybean meal,double low rapeseed meal,soybean,common rapeseed meal,DDGS and cottonseed meal were respectively 56.98％-79.81％,64.45％-82.69％,72.83％-87.34％,45.06％-55.65％,53.04％-61.42％and 13.02％-19.48％.The amino acid apparent digestibility in terminal ileum of seven protein feedstuffs ranged from 51.49％to 93.90％,and the standard digestibility ranged from 54.36％to 96.23％.The correlation models of CP and EE with the apparent digestibility in the terminal ileum were y=0.49x+45.05(R2=0.604 9)and y=0.855x+72.95(R2=0.868 7),respectively.The correlation models of amino acid content in soybean meal with terminal ileum apparent and standard digestibility were y=0.006 8x+61.60(R2=0.600 1)and y=0.005 9x+66.44(R2=0.653 2),respectively.[Conclusion]Considering cost and amino acid standard digestibility in ter minal ileum comprehensively,DDGS is suitable for reducing or replacing soybean meal in pig feedstuffs.
pigfeedsoybean meal reductionreduction and replacementbioavailabilityapparent digestibility
NETL
NSTL
万方数据
维普
