Effects of Dietary Strategy on Performance and Carcass Traits of Erlang Mountain Chickens from Different Genetic Strains

ZHANG Kai; DING Xuemei; BAI Shiping; ZENG Qiufeng; LUO Yuheng; ZHU Qing; ZHANG Keying

doi:10.3969/j.issn.1006-267x.2013.09.008

2013 , Vol. 25 >Issue 9: 1963 - 1975

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.09.008

Poultry Nutrition

Effects of Dietary Strategy on Performance and Carcass Traits of Erlang Mountain Chickens from Different Genetic Strains

ZHANG Kai ,
DING Xuemei ,
BAI Shiping ,
ZENG Qiufeng ,
LUO Yuheng ,
ZHU Qing ,
ZHANG Keying

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1. Ministry of Education Key Laboratory of Animal Disease-Resistant Nutrition, Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China;
2. Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Ya'an 625014, China

Received date: 2013-03-22

Online published: 2013-08-18

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Abstract

This study was designed to investigate the effects of dietary strategy on performance and carcass traits of Erlang mountain chickens from different genetic strains and sexes. The experimental design was a 4?2?2 factorial arrangement with four genetic strains, two dietary strategies and two sexes (male and female). One thousand and nine hundred twenty 1-day-old Erlang mountain chickens were randomly divided into 8 treatments with 8 replicates (4 male replicates, 4 female replicates) and 30 chickens in each replicate. The performance during the three stages, serum biochemical parameters on 28 d and carcass traits on 67 d of Erlang mountain chickens were investigated. The results showed that there was no significant difference in feed intake (FI) between the two diet strategies (P>0.05). But body weight (BW) on 67 d (P<0.01) and body weight gain (BWG) (P<0.01) and mortality at 1 to 67 d (P<0.05) in high lysine diet group were significantly higher and feed to gain ratio (F/G) at 1 to 49 d and 1 to 67 d was significantly lower than that in low lysine diet group (P<0.01). The dietary strategy had no significant effects on slaughter rate, eviscerated yield with giblet rate, eviscerated yield, left breast rate, left thigh rate, breast color and pH 45 min after slaughter on 67 d (P>0.05). The genetic strains had significant effects on BW on 28 and 67 d, and BWG at 1 to 28 d,1 to 49 d and 1 to 67 d (P<0.01), and SD02 had the highest values on above indices among all genetic strains. SD0302 had the highest BW on 49 d, and followed by SD02, and they were higher than SD0203 (P<0.05). SD0302 and SD02 had higher FI at 1 to 28 d than the other two genetic strains (P<0.05). Slaughter rate and abdominal fat rate of SD02 were significantly higher than those of the other three genetic strains (P<0.05). The interaction of dietary strategy, sex and genetic strain was significant in BW on 67 d and BWG at 1 to 67 d (P<0.01). In conclusion, the high lysine diet can significantly affect BW on 67 d, BWG at 1 to 67 d, F/G at 1 to 49 d and 1 to 67 d of Erlang mountain chickens, and by comprehensive evaluation of performance and carcass traits, it can be concluded as follows: strains SD0302 and SD02>SD0203>SD03, and the performance of male is better than that of female; and because the interaction of dietary strategy, sex and genetic strain is significant in body weight gain, Erlang mountain chickens should be separately raised.

Key words： Erlang mountain chickens; genetic strain; dietary strategy; performance; carcass traits

Cite this article

ZHANG Kai , DING Xuemei , BAI Shiping , ZENG Qiufeng , LUO Yuheng , ZHU Qing , ZHANG Keying . Effects of Dietary Strategy on Performance and Carcass Traits of Erlang Mountain Chickens from Different Genetic Strains[J]. Chinese Journal of Animal Nutrition, 2013 , 25(9) : 1963 -1975 . DOI: 10.3969/j.issn.1006-267x.2013.09.008

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