动物营养学报2016，Vol.28Issue(4)：1233-1240,8.DOI:10.3969/j.issn.1006-267x.2016.04.035
磷酸脲添加量对羔羊生长性能、屠宰性能和肉品质的影响
Effects of Urea Phosphate Supplemental Level on Growth Performance, Slaughter Performance and Meat Quality of Lambs
摘要
Abstract
This experiment aimed to investigate the effects of urea phosphate supplemental level on growth per-formance, slaughter performance and meat quality of lambs, and to evaluate the safety dosage of urea phos-phate used in lambs ’ diet. Eighty F1 Dorper × thin-tailed Han crossbred male lambs with an average body weight of (25.86±1.06) kg were used and randomly divided into 5 groups with 8 replicates per group and 2 lambs per replicate. Urea phosphate was added into each group to partly replace soybean meal and other ingre-dients of a basal diet, which had an equal proportion of forage and concentrate. Urea phosphate level in diets of each group was 0 ( control) , 0.5%, 1%, 2% and 4%, respectively. The adaptation period was 12 d, and ex-perimental period was 60 d. The results showed as follows:1% group had largest values of average daily gain ( ADG) in each period, live weight before slaughter, carcass weight and slaughter rate; while ADG in each period, live weight before slaughter and carcass weight of 4% group were significantly lower than those of oth-er groups ( P<0.01);compared with control group, the supplementation of urea phosphate had little effects on the lamb meat redness, pH and drip loss ( P>0.05) , and 2% group had a highest value of yellowness occurred (P<0.05); in addition, share force of 1% group (5.16 kg/cm2) was significantly higher than that of 0.5%group (4.47 kg/cm2), 4% group (3.69 kg/cm2) and control group (4.21 kg/cm2) (P<0.05). In conclu-sion, urea phosphate can be used as an additive for nitrogen and phosphorus in diets for fattening lambs. Lambs supplemented with 1% urea phosphate have the best growth and slaughter performance. Supplementation of 4%urea phosphate significantly decreases ADG and carcass weight, but muscle redness and brightness are im-proved. It is safe to add 2% urea phosphate in lambs’ diet with detrimental effects on growth, slaughter per-formance and meat quality, and it can significantly improve brightness value of muscle. Therefore, supplemen-tation of 1% urea phosphate is beneficial for growth performance of fattening lambs to reach an optimal level.关键词
磷酸脲/羔羊/平均日增重/屠宰率/肉品质Key words
urea phosphate/lamb/average daily gain/slaughter rate/meat quality分类
农业科技引用本文复制引用
张帆,纪守坤,张乃锋,姜成钢,王黎文,丁健,司丙文,屠焰,刁其玉..磷酸脲添加量对羔羊生长性能、屠宰性能和肉品质的影响[J].动物营养学报,2016,28(4):1233-1240,8.基金项目
农产品质量安全专项资金(2014) （2014）
牧区饲草饲料资源开发利用技术研究与示范(20120304202) （20120304202）
