板栗叶发酵TMR日粮对羔羊育肥效果的影响OA

[Objectives]The feeding experiment was conducted with a total mixed ration(TMR)diet formu-lated on the basis of nutritional requirements of fattening lambs to provide a theoretical basis for the develop-ment and application of chestnut by-products in the fattening of mutton sheep.[Methods]Feed with fermented Chinese chestnut leaf was prepared by inoculating EM inoculant(compound microbial preparation)into Chi-nese chestnut leaves,adding 20％wheat bran,and undergoing mixing,compression,sealing and other processes for over 15 days of fermentation.40 healthy and 3-month-old fattening Small Tail Han lambs with similar body condition and weighted 15±0.96 kg were selected from 3 sheep farms in Qian'an City,Hebei Province,and di-vided into the experimental group and the control group with 20 lambs in each group.The roughage for the ex-perimental group was fermented chestnut leaves,while that for the control group was corn stalks.The concen-trates and other additives for both groups were the same.The period of feeding lasted 90 days.The average daily gain(ADG),profit,feed-to-gain ratio,feed conversion rate and dressing percentage of mutton sheep were determined.[Results]The fermented feed made from the processed chestnut leaves significantly improved the content of nutrition compared to the unfermented chestnut leaves.No aflatoxins were detected before or after the process of fermentation.Compared with the control group,the daily weight gain of the sheep in the experi-mental group increased by 57.92 g per sheep,and the profit per sheep increased by 59.63 yuan.The profit growth rate was 18.81％.The feed-to-meat ratio of the experimental group was 4.79:1,6.26％higher than that of the control group,and the slaughter rate increased by 3.28 percentage points.[Conclusions]The technology of feeding TMR diet with fermented chestnut leaf is superior to the current conventional methods of feeding,and it can significantly improve the economic benefits of fattening mutton sheep.