摘要
将3月龄左右肉用羔羊短期育肥50 d,以研究秸秆颗粒型日粮对育肥羔羊屠宰指标及肉品质的影响。选取3月龄左右小尾寒羊24只,共分为4个处理组,其中,对照组饲喂铡短玉米秸秆+苜蓿干草+精料颗粒,试验Ⅰ组饲喂玉米秸秆颗粒+苜蓿干草+精料颗粒,试验Ⅱ组饲喂玉米秸秆苜蓿颗粒+精料颗粒,试验Ⅲ组饲喂玉米秸秆苜蓿精料全混合颗粒饲料。试验期结束后测定羊只屠宰性能和羊肉理化品质。结果表明,胴体重和屠宰率方面,试验Ⅰ组与对照组差异不显著(P>0.05),试验Ⅱ组、试验Ⅲ组的胴体重均显著高于对照组(P<0.05),试验Ⅲ组屠宰率显著高于试验Ⅰ组和对照组(P<0.05);眼肌面积方面,依次为试验Ⅲ组>试验Ⅱ组>试验Ⅰ组>对照组(P>0.05);失水率和剪切力方面,3个试验组均低于对照组(P>0.05);试验Ⅱ组的pH_(24 h)显著低于对照组(P<0.05),但与其他试验组差异不显著(P>0.05)。综合考虑,将玉米秸秆加工制粒的饲料,尤其是与苜蓿干草和精料全混合制粒后的颗粒饲料,更适合商品化肉羊的短期育肥。
This study aimed to assess the effect of feeding pelletized straw diet on slaughter trait and meat quality of fattening lambs. A total of twenty four three-month-old mutton lambs were randomly assigned to one of four groups such that control group fed the diet of cut short corn straw ＋ alfalfa hay ＋ pelletized concentrate, group Ⅰ fed the diet of pelletized corn straw ＋ alfalfa hay ＋ pelletized concentrate, group Ⅱ fed the diet of pelletized mixture of corn straw and alfalfa ＋ pelletized concentrate, group Ⅲ fed the total mixed and pelletized diet of corn straw, alfalfa hay and concentrate. The feeding experiment lasted for fifty days. At the end of the experiment, the slaughter trait and meat quality of fattening lambs in different groups were determined and statistically compared. The results showed that there were no significant differences in carcass weight and dressing percentage between group Ⅰ and control group （P〉0.05）; group Ⅱ and groupⅢ had significantly higher carcass weight than that of control group （P〈 0.05）; group had significantly higher dressing percentage than group I and control group （P〈0.05）; the sequence of eye muscle area of different groups was as followed： group Ⅲ 〉 group Ⅱ 〉 group Ⅰ 〉 control group （P〉0.05）; compared to control group, the three experimental groups had lower water loss rate and shearing force （P〉0.05）; the pile4 h value of group II was significantly lower than that of control group （P〈0.05）, no significant differences in pH24h value between group Ⅱ and the other experimental groups were found （P〉0.05）. The combined data suggest that the pelletized corn straw diet, especially the total mixed and pelletized diet prepared with corn straw, alfalfa hay and concentrate, is appropriate for the short-term fattening of commercial mutton sheep.
作者
王婕姝
韩向敏
王毅
WANG Jie-shu HAN Xiang-min WANG Yi(Animal Disease Control and Prevention Center of Baishan of Jilin Province, Baishan 134300, China College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China Institute of Animal Husbandry and Veterinary Medicine of Lanzhoa of Gansu Province, Lanzhou 730050, China)
出处
《畜牧与饲料科学》
2017年第6期41-44,共4页
Animal Husbandry and Feed Science
基金
甘肃省农业科技创新项目(GNCX-2013-34)
兰州市人才创新创业项目(2015-RC-96)
兰州市科技计划项目(2015-3-57)
关键词
秸秆
颗粒型日粮
育肥羔羊
屠宰性能
肉品质
straw
pelletized diet
fattening lambs
slaughter trait
meat quality
