摘要
A metabolism trial was conducted to investigate the effects of graded dietary supplement of Sodium Butyrate （SB）, either powder （uncoated） or coated on nutrient utilization in broilers. Seventy-two 42-day-old AA broilers were randomly divided into nine treatments, each treatment consisted of four replicate cages of two chickens each. Broilers were fed the following diets： A） CTR： control diet （without any SB and antibiotics）; B） Antibiotic： supply antibiotics （Zinc Bacitracin 40 mg/kg ＋ Colistin Sulfate 8 rng/kg） into the basal diet; C） PSB-100： control diet ＋ 100 mg/kg PSB （powder Sodium Butyrate）; D） PSB-200： control diet ＋ 200 mg/kg PSB; E） PSB-300： control diet ＋ 300 mg/kg PSB; F） CSB-100： control diet ＋ 100 mg/kg CSB （coated Sodium Butyrate）; G） CSB-200： control diet ＋ 200 mg/kg CSB; H） CSB-300： control diet ＋ 300 mg/kg CSB. The birds were housed in 36 wire cages in an environmentally controlled room, fed for ad libitum intake and had free access to water. Feed and excreta samples were collected to determine DM （dry matter）, CP （crude protein）, EE （ether extract）, GE （gross energy） and NDF （neutral detergent fibre）. Results in- dicated that compared with control diet, SB could improve the AMR （apparent metabolic rate） and TMR （true metabolic rate） ofDM, CP, EE, GE and NDF on broilers, and it could replace antibiotics partly, and the effect of CSB was better than that of powder （uncoated） ones.
