Effects of Fermented Sweet Potato Residue on Growth Performance,Slaughter Performance and Meat Quality of Yellow-Feathered Broilers
This study was aimed to investigate the effects of different levels fermented sweet potato residue on the growth performance,slaughter performance and meat quality of yellow-feathered broilers.Firstly,the apparent metabolic rates of nutrients in fermented sweet potato residue were determined by strong feeding metabolic test;then,360 one-day-age yellow-feathered broilers were randomly divided into 4 groups(Ⅰ,Ⅱ,Ⅲ,Ⅳ),each with 6 replicates and 15 chickens per replicate.The broilers in the test group Ⅰ were fed a basal diet as control group,during 1 to 21 days of age,the test group Ⅱ,Ⅲ and Ⅳ were fed with 10、30 and 50 g·kg-1 fermented sweet potato residue instead of corn in the basic diet,respectively;during 22 to 42 days of age and 43 to 70 days age were fed with 50、80 and 100 g·kg-1 fermented sweet potato residue instead of corn in the basic diet,respectively.The trial period was 70 days.The results showed that the apparent metabolic rate of nutrients in fermented sweet potato residue of yellow feather broilers was as follow:crude protein 63.67％,crude fat 65.72％,ash 70.85％,crude fiber 72.45％and gross energy 87.93％.Fermented sweet potato residue equivalent instead of corn had no significant effect on average daily gain,average daily feed intake and feed to gain ratio of yellow-feathered broilers(P＞0.05).Compared with the control group,the slaughter rate,clearance rate,chest muscle rate,leg muscle rate and abdominal fat rate had no significant effect among the test groups(P＞0.05).Group Ⅱ,Ⅲ,Ⅳ improved the pH values and a*values of the pectoral muscles and leg muscles,reduced the drip loss,shear stress(P＞0.05).The cooking loss of pectoral muscles and leg muscles reduced significantly(P＜0.05).To sum up,the addition of 50 g·kg-1 to 100 g·kg-1 of fermented sweet potato residue equivalent instead of corn can improve meat quality of yellow-feathered broilers.
万方数据
维普
