Determination and Prediction Model Establishment of Digestible Energy and Metabolizable Energy of Fermented Cottonseed Meal in Growing Pigs
This experiment was conducted to determine the nutrient levels of fermented cottonseed meal and its digestible energy(DE)and metabolizable energy(ME)in growing pigs,and to establish the prediction model of DE and ME based on the effective nutrient levels of fermented cottonseed meal in growing pigs.Five castra-ted healthy male Duroc×Landrace×Yorkshire crossbred growing pigs with similar body weight of 40 to 50 kg were selected in the experiment and fed one basal diet and four kinds of fermented cottonseed meal diets(adding different sources of fermented cottonseed meal to replace 20％ corn and soybean meal in the basal di-et)in a 5×5 complete Latin square design,respectively.The DE and ME of fermented cottonseed meal in growing pigs were determined by total feces and urine collection method and substitution method,and the pre-diction equations of DE and ME based on the effective nutrient levels of fermented cottonseed meal were estab-lished by stepwise regression method.The results show that,on the air-dry basis,the gross energy(GE)and contents of crude protein(CP),dry matter(DM),crude ash(Ash),ether extract(EE),calcium(Ca),total phosphorus(TP),crude fiber(CF),acid detergent fiber(ADF),neutral detergent fiber(NDF)and total starch(TS)of the four kinds of fermented cottonseed meals were 14.53 to 18.11 MJ/kg,46.59％to 52.03％,88.57％ to 93.71％,7.98％ to 16.50％,0.51％ to 3.19％,0.22％ to 0.66％,0.40％ to 1.51％,10.26％ to 22.24％,16.33％ to 29.26％,27.34％to 41.52％ and 0.34％ to 2.31％,and the mean were 16.73 MJ/kg,49.76％,91.62％,10.35％,1.36％,0.38％,1.04％,13.71％,19.75％,32.37％and 0.94％,respectively.The average DE and ME values of the four fermented cottonseed meal were 9.04 and 8.21 MJ/kg,respectively.Based on the available nutrient levels of fermented cottonseed meal,the best predic-tion model of DE in growing pigs was DE=-24.161+0.667CP(R2=0.97,P＜0.05),and the best prediction models of ME was ME=-9.057+1.587DE+0.148ADF(R2=1.00,P＜0.05),ME=-13.344+1.472DE+0.158ADF+0.103CP(R2=1.00,P＜0.01).In conclusion,CP content was the main reason for the difference between DE and ME,and CP and ADF contents could be the key predictors of DE and ME of fermented cot-tonseed meal in growing pigs.[Chinese Journal of Animal Nutrition,2024,36(1):174-185]
growing pigsfermented cottonseed mealdigestible energymetabolizable energyprediction model
万方数据
维普
