磷酸脲添加量对羔羊生长性能、屠宰性能和肉品质的影响

发布时间：2018-06-03 01:45

本文选题：磷酸脲 + 羔羊　；参考：《动物营养学报》2016年04期

【摘要】：本试验旨在研究磷酸脲添加量对羔羊生长性能、屠宰性能和肉品质的影响,并对磷酸脲在肉羊生产中的安全使用剂量进行评价。试验选用80只杜寒杂交F1代平均体重(25.86±1.06)kg的公羔羊,随机分为5组,每组8个重复,每个重复2只,在精粗比为1∶1的饲粮中分别以0(对照)、0.5%、1%、2%、4%的磷酸脲替代部分豆粕类饲料。预试期为12 d,正试期为60 d。结果表明:1%组的羔羊在各时期平均日增重、宰前活重、胴体重、屠宰率均达到最高值;4%组的羔羊在各时期平均日增重、宰前活重、胴体重均极显著低于其他各组(P0.01);与对照组相比,磷酸脲添加量对肉色红度值、p H、滴水损失无显著影响(P0.05);2%组的黄度值显著高于其他各组(P0.05);在剪切力方面,1%组(5.16 kg/cm2)显著高于0.5%组(4.47 kg/cm2)、4%组(3.69 kg/cm2)和对照组(4.21 kg/cm2)(P0.05)。结果提示:磷酸脲可以作为氮磷添加剂用于肉羊饲粮中。羔羊饲粮中的磷酸脲添加量为1%时,羔羊达到最佳生长性能和屠宰性能;当磷酸脲替代比例达到4%时,极显著降低羔羊的平均日增重、胴体重,增加肌肉的亮度值;当磷酸脲替代比例为2%时,为有效安全水平,对羔羊生长性能、屠宰性能和肉品质除肌肉黄度值外无显著影响。因此,饲粮中磷酸脲适宜添加量为1%。
[Abstract]:The purpose of this experiment was to study the effects of urea phosphate addition on the growth performance, slaughter performance and meat quality of lambs, and to evaluate the safe dosage of urea phosphate in meat sheep production. 80 male lambs with average body weight of 25.86 卤1.06)kg were randomly divided into 5 groups, 8 replicates in each group and 2 lambs in each group. In the diet with the ratio of precision to crude at 1:1, some soybean meal feeds were replaced with 0 (control group, 0.5%) and 2% urea phosphate (2%). The pre-test period was 12 days and the positive test period was 60 days. The results showed that the average daily gain, carcass weight, carcass weight and slaughter rate of the lambs in the 1% group reached the highest value in each period, and the average daily gain and the live weight before slaughter of the lambs in the 4% group reached the highest value in each period. The carcass weight was significantly lower than that in other groups (P 0.01), and was significantly lower than that in the control group. There was no significant effect of urea phosphate addition on the red value of meat and the loss of drip water. The yellowness of P0.05% group was significantly higher than that of other groups, but the shear stress of 1% group was significantly higher than that of 0.5% group (3.69 kg / cm 2) and the control group was 4.21 kg 路cm 2 路cm 2 (P < 0.05), but the shear stress of 1% group was significantly higher than that of 0.5% group (3.69 kg / cm 2) and that of the control group was 4.21 kg 路cm ~ (2) 路cm ~ (2). The results suggest that urea phosphate can be used as nitrogen and phosphorus additive in diet of meat sheep. When the feed amount of urea phosphate was 1, the lambs reached the best growth performance and slaughtering performance, and when the substitution ratio of urea phosphate reached 4, the average daily gain, carcass weight and muscle brightness value of the lambs were significantly decreased. When the substitution ratio of urea phosphate was 2, there was no significant effect on lamb growth performance, slaughter performance and meat quality except muscle yellowness. Therefore, the appropriate amount of urea phosphate in diet is 1%.
【作者单位】：中国农业科学院饲料研究所农业部饲料生物技术重点实验室;农业部畜牧兽医总站;
【基金】：农产品质量安全专项资金(2014) 牧区饲草饲料资源开发利用技术研究与示范(20120304202)
【分类号】：S826.5

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