Cornell Net Carbohydrate Protein System to Evaluate Dietary Balance and Its Effects on Growth Performance,Digestion and Metabolism of Fattening Tan Sheep
In order to explore the dietary balance of Cornell net carbohydrate protein system(CNCPS),seven diets were evaluated and analyzed using CNCPS.The seven diets were:basic material+Caragana microphylla,basic material+ryegrass,basic material+reed grass,basic material+oat grass,basic material+rice straw,basic material+rice husk,and basic material+corn cob(corresponding to trial groups 1 to 7,respectively).A total of 105 five-month-old Tan sheep with similar body weight and good body condition were randomly divided into 7 groups with 15 sheep in each group and fed 7 diets,respectively,which were verified by feeding experi-ment,digestion and metabolism experiment and growth performance.The results showed as follows:1)the content of rapidly degradable carbohydrate(CA)was the highest,and the content of non-degradable carbohy-drate(CC)was the lowest in trial group 5,indicating that the carbohydrate(CHO)had a high degradation rate and utilization rate in the rumen.The content of rapidly degradable protein(PA)in trial group 4 was the highest,indicating that the crude protein(CP)had a higher degradation rate in the rumen,and the content of bound protein(PC)in trial group 7 was the lowest,indicating that the CP had a high utilization rate in the ru-men.2)In trial group 7,the digestibility of dry matter(DM),CP and crude fat(EE)was higher,and the dry matter feed intake and average daily gain were the maximum values of each group.In summary,the diets in trial group 7 containing corn cob has the best feed conversion rate and the best feeding effect on fattening beach sheep,followed by the diets in trial group 4 containing oat grass.This indicates that corn cobs with poor nutrients can be effectively used through a high degree of crushing treatment and using them in combination with other high-quality feeds to rationally prepare feed grains.[Chinese Journal of Animal Nutrition,2024,36(11):7173-7184]
CNCPSTan sheepdigestion and metabolismgrowth performance
万方数据
维普
