Fermented Cotton By-Product Total Mixed Ration on Growth Performance,Nutrient Apparent Digestibility and Rumen Fermentation Parameters of Karakul Sheep
This experiment was conducted to investigate the effects of feeding fermented cotton by-product total mixed ration on the growth performance,nutrient apparent digestibility and rumen fermentation parameters of Karakul sheep.Thirty-six healthy male Karakul sheep with similar body weight of(26.0±2.2)kg at 2 to 3 months of age were randomly divided into three groups with 12 lambs in each group,and each sheep as a repli-cate.Sheep in CK group were fed 100％cotton by-product total mixed ration,those in FFG group were fed 50％fermented cotton by-product total mixed ration+50％cotton by-product total mixed ration,and those in EFG group were fed 80％fermented cotton by-product total mixed ration+20％cotton by-product total mixed ration.The pre-test period was 15 days and the test period was 60 days.The growth performance,nutrient ap-parent digestibility and rumen fermentation parameters were measured.The results showed as follows:1)feed-ing 50％or 80％fermented cotton by-product total mixed ration could significantly or extremely significantly increase the average daily gain(ADG)and dry matter intake(DMI)of Karakul sheep(P＜0.05 or P＜0.01),and the DMI in EFG group was extremely significantly higher than that in FFG group(P＜0.01).2)The ap-parent digestibility of crude protein(CP)and neutral detergent fiber(NDF)of Karakul sheep could be signifi-cantly or extremely significantly improved by feeding 80％fermented cotton by-product total mixed ration(P＜0.05 or P＜0.01).3)Feeding 80％fermented cotton by-product total mixed ration could significantly reduce the rumen fluid pH and significantly increase the acetate concentration(P＜0.05),and feeding 50％or 80％fermented cotton by-product total mixed ration could significantly increase the rumen fluid ammonia nitrogen and propionate concentrations of Karakul sheep(P＜0.05).In summary,feeding 80％fermented cotton by-product total mixed ration can improve the growth performance,increase the apparent digestibility of CP and NDF,and promote the rumen fermentation of Karakul sheep.[Chinese Journal of Animal Nutrition,2024,36(3):1745-1755]
fermented cotton by-product total mixed rationKarakul sheepgrowth performanceapparent di-gestibility of nutrientsrumen fermentation
万方数据
维普
