本试验旨在研究不同添加比例发酵桑叶对湘西黄牛×利木赞杂交F1代育肥牛屠宰性能、肉品质及肌肉中氨基酸、脂肪酸含量的影响。试验选取20头12~15月龄健康湘西黄牛×利木赞杂交F1代公牛,随机分为4个组,每组5个重复,每个重复1头...本试验旨在研究不同添加比例发酵桑叶对湘西黄牛×利木赞杂交F1代育肥牛屠宰性能、肉品质及肌肉中氨基酸、脂肪酸含量的影响。试验选取20头12~15月龄健康湘西黄牛×利木赞杂交F1代公牛,随机分为4个组,每组5个重复,每个重复1头牛。各组饲粮中发酵桑叶添加比例分别为0(CG组,对照组)、10%(LG组)、20%(MG组)和30%(HG组)。预试期10 d,正试期90 d。结果表明:1)HG组屠宰率和净肉率为59.07%、47.35%,屠宰率比CG、LG和MG组分别提高了0.64%、1.89%和1.00%,净肉率分别提高了0.47%、0.58%和0.41%,但差异不显著(P>0.05)。与CG组相比,LG、MG和HG组眼肌面积分别提高了10.21、9.97、11.97 cm 2。2)各组间肌肉干物质、粗蛋白质、粗脂肪、粗灰分含量均无显著差异(P>0.05)。HG组肌肉剪切力显著低于CG、LG和MG组(P<0.05),HG组肌肉滴水率显著高于CG、LG和MG组(P<0.05),LG、MG组肉肌肉失水率显著低于CG和HG组(P<0.05)。3)各组间肌肉中总氨基酸和脂肪酸含量均无显著差异(P>0.05)。HG组肌肉中苏氨酸、蛋氨酸、酪氨酸含量显著高于CG、LG和MG组(P<0.05),HG组的肌肉必需氨基酸评分更接近联合国粮农组织(FAO)理想模式。由此可见,饲粮中添加发酵桑叶对湘西黄牛×利木赞杂交F1代公牛的屠宰性能、肉品质以及肌肉中氨基酸、脂肪酸含量的提升有一定的促进作用。展开更多
A comparative study was conducted on four mulberry（ Morus alba） varieties（ lines） in Hunan dry land from the aspects of production performance,nutritional composition and amino acids content. The result showed tha...A comparative study was conducted on four mulberry（ Morus alba） varieties（ lines） in Hunan dry land from the aspects of production performance,nutritional composition and amino acids content. The result showed that the four mulberry varieties all adjusted well to soil,climate and other natural conditions in Hunan province,presenting good growth. The dry matter content of four varieties（ lines） was above 25% and the crude protein content was more than 22%. Although the crude protein and total amino acid content of four mulberry varieties were lower than that of soybean powder,the proportion of various amino acids tended to be consistent,so mulberry leaf was very comprehensive in nutrition as an animal feed. Yuesang 11 had the highest fresh yield and crude protein of 14. 28 t / hm^2 and23. 22% respectively; Guisangyou 12 had the highest total amino acid content of 19. 58%. There were differences among four varieties,but each variety had its own advantages,so they all had good popularization value.展开更多
文摘本试验旨在研究不同添加比例发酵桑叶对湘西黄牛×利木赞杂交F1代育肥牛屠宰性能、肉品质及肌肉中氨基酸、脂肪酸含量的影响。试验选取20头12~15月龄健康湘西黄牛×利木赞杂交F1代公牛,随机分为4个组,每组5个重复,每个重复1头牛。各组饲粮中发酵桑叶添加比例分别为0(CG组,对照组)、10%(LG组)、20%(MG组)和30%(HG组)。预试期10 d,正试期90 d。结果表明:1)HG组屠宰率和净肉率为59.07%、47.35%,屠宰率比CG、LG和MG组分别提高了0.64%、1.89%和1.00%,净肉率分别提高了0.47%、0.58%和0.41%,但差异不显著(P>0.05)。与CG组相比,LG、MG和HG组眼肌面积分别提高了10.21、9.97、11.97 cm 2。2)各组间肌肉干物质、粗蛋白质、粗脂肪、粗灰分含量均无显著差异(P>0.05)。HG组肌肉剪切力显著低于CG、LG和MG组(P<0.05),HG组肌肉滴水率显著高于CG、LG和MG组(P<0.05),LG、MG组肉肌肉失水率显著低于CG和HG组(P<0.05)。3)各组间肌肉中总氨基酸和脂肪酸含量均无显著差异(P>0.05)。HG组肌肉中苏氨酸、蛋氨酸、酪氨酸含量显著高于CG、LG和MG组(P<0.05),HG组的肌肉必需氨基酸评分更接近联合国粮农组织(FAO)理想模式。由此可见,饲粮中添加发酵桑叶对湘西黄牛×利木赞杂交F1代公牛的屠宰性能、肉品质以及肌肉中氨基酸、脂肪酸含量的提升有一定的促进作用。
基金Supported by Key Technology Research for Development and Efficient Cultivation and Utilization of Forage Mulberry(2013SZ03)
文摘A comparative study was conducted on four mulberry（ Morus alba） varieties（ lines） in Hunan dry land from the aspects of production performance,nutritional composition and amino acids content. The result showed that the four mulberry varieties all adjusted well to soil,climate and other natural conditions in Hunan province,presenting good growth. The dry matter content of four varieties（ lines） was above 25% and the crude protein content was more than 22%. Although the crude protein and total amino acid content of four mulberry varieties were lower than that of soybean powder,the proportion of various amino acids tended to be consistent,so mulberry leaf was very comprehensive in nutrition as an animal feed. Yuesang 11 had the highest fresh yield and crude protein of 14. 28 t / hm^2 and23. 22% respectively; Guisangyou 12 had the highest total amino acid content of 19. 58%. There were differences among four varieties,but each variety had its own advantages,so they all had good popularization value.
