Effects of Urea Phosphate Supplemental Level on Growth Performance, Slaughter Performance and Meat Quality of Lambs

ZHANG Fan; JI Shoukun; ZHANG Naifeng; JIANG Chenggang; WANG Liwen; DING Jian; SI Bingwen; TU Yan; DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2016.04.035

Chinese Journal of Animal Nutrition >

2016 , Vol. 28 >Issue 4: 1233 - 1240

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.04.035

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Effects of Urea Phosphate Supplemental Level on Growth Performance, Slaughter Performance and Meat Quality of Lambs

ZHANG Fan ,
JI Shoukun ,
ZHANG Naifeng ,
JIANG Chenggang ,
WANG Liwen ,
DING Jian ,
SI Bingwen ,
TU Yan ,
DIAO Qiyu

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1. Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. Station of Animal and Veterinary of the Ministry of Agriculture, Beijing 100026, China

Received date: 2015-11-16

Online published: 2016-04-11

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Abstract

This experiment aimed to investigate the effects of urea phosphate supplemental level on growth performance, slaughter performance and meat quality of lambs, and to evaluate the safety dosage of urea phosphate 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 ingredients 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 experimental 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 other 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 conclusion, 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 improved. It is safe to add 2% urea phosphate in lambs' diet with detrimental effects on growth, slaughter performance and meat quality, and it can significantly improve brightness value of muscle. Therefore, supplementation of 1% urea phosphate is beneficial for growth performance of fattening lambs to reach an optimal level.

Key words： urea phosphate; lamb; average daily gain; slaughter rate; meat quality

Cite this article

ZHANG Fan , JI Shoukun , ZHANG Naifeng , JIANG Chenggang , WANG Liwen , DING Jian , SI Bingwen , TU Yan , DIAO Qiyu . Effects of Urea Phosphate Supplemental Level on Growth Performance, Slaughter Performance and Meat Quality of Lambs[J]. Chinese Journal of Animal Nutrition, 2016 , 28(4) : 1233 -1240 . DOI: 10.3969/j.issn.1006-267x.2016.04.035

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