摘要
试验旨在研究不同饲草对东乡地区肉羊肉品质及营养特征的影响。饲草种类选择青贮玉米、干麦草和苜蓿,选择小尾寒羊、萨福克×小尾寒羊(萨×寒)F1、陶赛特×小尾寒羊(陶×寒)F1共90只,随机分为3组(每组相同品种各10只),每组3个重复,每个重复10只羊。预试期15 d,正式试验期90 d。结果表明,在肉品质方面,苜蓿组羊肉的质构特性优于青贮玉米组和干麦草组,其羊肉色泽鲜红、嫩度高、多汁性好、胴体品质佳;按肉羊种群划分,萨福克×小尾寒羊F1羊肉的适口性较好。在营养特征方面,苜蓿组小尾寒羊羊肉中粗蛋白含量显著高于青贮玉米组和干麦草组(P<0.05);青贮玉米组羊肉的脂肪含量极显著高于其他两组(P<0.01),糖原含量极显著高于苜蓿组(P<0.01);但干麦草组氨基酸总量(TAA)、必需氨基酸总量(EAA)最高,苜蓿组次之,青贮玉米组最低。萨福克×小尾寒羊F1羊肉的EAA/TAA和EAA/非必需氨基酸总量(NEAA)较高。研究表明,青贮玉米、干麦草和苜蓿在饲料中的占比会直接影响不同种群羊肉的口感和营养价值,可以根据口感及营养的不同需要,对粗饲料结构和肉羊基础种群进行调整。
This study aimed to investigate the impact of different forage grass on the meat quality and nutritional characteristics of mutton sheep in Dongxiang region.The selected forage grass types included corn silage,dry wheat straw,and alfalfa.A total of 90 mutton sheep,comprising Small-tailed Han sheep,Poll Dorset sheep×Small-tailed Han sheep F1,and Suffolk sheep×Small-tailed Han sheep F1,were divided into three groups(with 10 individuals of the same breed in each group),with three replicates in each group and 10 sheep in each replicate.The pre-trial period was 15 days,and the formal experimental period was 90 days.The results showed that in terms of meat quality,the texture characteristics of the mutton in the alfalfa group were superior to those in the corn silage group and dry wheat straw group.The mutton in the alfalfa group exhibited a bright red color,high tenderness,good juiciness,and overall excellent carcass quality.When categorized by sheep population,the palatability of Suffolk sheep×Small-tailed Han sheep F1 mutton was relatively better.In terms of nutritional characteristics,the crude protein content in the mutton of Small-tailed Han sheep from the alfalfa group was significantly higher than that of the corn silage and dry wheat straw groups(P<0.05).The fat content in the mutton from the corn silage group was extremely higher than the other two groups(P<0.01),and glycogen content was extremely higher than the alfalfa group(P<0.01).However,the amino acid total content and essential amino acid total content were the highest in the dry wheat straw group,followed by the alfalfa group,and the lowest in the corn silage group.The EAA/TAA and EAA/NEAA ratios were higher in the Suffolk×Small-tailed Han sheep F1 mutton.The study indicates that the proportion of corn silage,dry wheat straw,and alfalfa in the diet directly affects the taste and nutritional value of mutton from different sheep populations.Adjustments to the coarse feed structure and the basic sheep population can be made based on specific taste an
作者
周国栋
王伟
王零春
杨磊
杜崇武
ZHOU Guo-dong;WANG Wei;WANG Ling-chun;YANG Lei;DU Chong-wu
出处
《饲料研究》
CAS
北大核心
2024年第3期6-13,共8页
Feed Research
基金
甘肃省技术创新引导计划-农业类-科技特派团专项“国家特派团临夏重点帮扶县肉羊产业提质增效关键技术应用研究与示范(项目编号:22CX8NA012)”
甘肃省技术创新引导计划-农业类-科技特派员(基地)专项“永靖县肉羊产业提质增效关键技术应用研究与示范(项目编号:22CX8NN232)”。
关键词
肉羊
不同饲草
肉品质
营养特征
mutton sheep
different forage grass
meat quality
nutritional characteristics
