动物营养学报Issue(2)：569-577,9.DOI:10.3969/j.issn.1006-267x.2015.02.029
不同饲养方式和饲养密度对肉鸡生长性能及肉品质的影响
Effects of Different Rearing System and Stocking Density on Growth Performance and Meat Quality of Broilers
摘要
Abstract
The effects of rearing system and stocking density on growth performance and carcass composition of broilers were investigated in this experiment. Using a 3×2 factors completely randomized design, a total of 504 seven-day-old male broilers ( Ross 308) were divided into 6 groups with 6 replicates per group, respec-tively. Three rearing systems were designed as battery rearing, floor rearing and net rearing. Two stocking den-sities were designed as normal density ( 12 birds/m2 ) and high density ( 16 birds/m2 ) . This test lasted for 35 d. The results showed as follows: 1 ) Rearing system had significant effect on average daily feed intake ( ADFI) , average daily gain ( ADG) and feed to gain ratio ( F/G) of broilers aged from 7 to 28 and 29 to 42 days ( P<0.001) . At 7 to 28 days of age, ADFI of broilers appeared as floor rearing>battery rearing> net rea-ring, ADG appeared as floor rearing> net rearing> battery rearing, F/G appeared as net rearing< floor rearing< battery rearing. At 29 to 42 days of age, floor rearing significantly enhanced ADFI of broilers com-pared with battery rearing and net rearing (P<0.05). Battery rearing significantly enhanced ADG of broilers compared with floor rearing and net rearing (P<0.05). F/G appeared as battery rearing> net rearing> floor rearing. High stocking density had the trend to decrease ADFI of broilers aged 7 to 28 days (0.05<P<0.10), significantly decreased BW of broilers aged 28 days (P<0.01), but did not significantly affect F/G (P>0.05). At 29 to 42 days of age, high stocking density had the trend to increase ADFI of broilers (0.05<P<0.10) , significantly decreased BW and increased F/G of 42days broilers ( P<0.01) . 2) Battery rearing signif-icantly decreased breast yields compared with the other two feeding system (P<0.05), high stocking density significantly increased abdominal fat yields ( P<0.05) . 3) The pH1 of breast muscle at 45 min after slaughter was significantly decreased in battery rearing ( P<0.01) . High stocking density significantly decreased pH1 and increased water-loss rate of breast muscle (P<0.05). 4) Floor rearing had the highest luminance (L∗) and yellowness ( b∗) , and had the trend to decrease redness ( a∗) of leg muscle, whereas, battery rearing group appeared the contrary effect, had the trend to decrease L∗and b∗, and increase a∗. High stocking density sig-nificantly decreased pH1( P<0. 01) and significantly increased the ether extract content of leg muscle ( P<0.05) . Significant interactive effects between rearing system and stocking density were appeared in pH1 of leg muscle ( P<0.01) , high stocking density significantly decreased pH1 of leg muscle of broilers in floor rearing and net rearing system ( P<0.05) but not in battery rearing system ( P>0.05) , and the lowest pH1 of leg mus-cle was appeared in floor rearing with high stocking density group. In conclusion, rearing system and stocking density have affect on the growth performance of broilers with no interaction is found. The interaction is found in meat quality of leg muscle, and high stocking density in floor and net rearing system can significant affect the leg muscle quality.关键词
饲养方式/饲养密度/生长性能/肉品质Key words
rearing system/stocking density/growth performance/meat quality分类
农业科技引用本文复制引用
李建慧,苗志强,杨玉,张华,张俊珍,卢营杰,杨鹰..不同饲养方式和饲养密度对肉鸡生长性能及肉品质的影响[J].动物营养学报,2015,(2):569-577,9.基金项目
“十二五”国家科技支撑计划(2012BAD39B04) （2012BAD39B04）
生态畜牧与环境兽医学山西省重点实验室开放基金(KF2013-01) （KF2013-01）
