Physicochemical characteristics of lamb meat fed with cottonseed associated with calcium lignosulphonate

ABSTRACT. The physicochemical characteristics of the meat from lambs fed diets containing whole or disintegrated cottonseed, associated or not with calcium lignosulfonate (LignoCaSO3), were evaluated. Thirty non-castrated Dorper x Santa Inês lambs, with an average of 24.9 ± 3.6 kg and four months of age were confined for 60 days in collective stalls and distributed in a completely randomized design with six replications. After slaughter, by means of contrasts, the averages of the parameters of the semimembranous and semitendinosus muscles were analyzed. The cottonseed increased cooking loss and ash, and reduced muscle weight, water holding capacity and red intensity. The disintegration of the cottonseed reduced the shear force in diets without LignoCaSO3, increased the protein and the loss by cooking and reduced the pH in the diets with the additive. The luminosity values increased with the disintegration of the cottonseed in diets with and without LignoCaSO3. The addition of LignoCaSO3 increased the weight of the muscle, protein, ash, pH, shear strength and the intensity of red. Moisture, lipids and yellow intensity were not influenced by the diets. Even changing the physical-chemical characteristics, the cottonseed with or without LignoCaSO3 does not change the quality of the meat.

摘要。本试验旨在评估饲喂添加或不添加木质素磺酸钙（calcium lignosulfonate, LignoCaSO3）的全棉籽或粉碎棉籽日粮的羔羊的肉品理化特性。选取30只平均体重为24.9±3.6 kg、月龄为4个月的未去势杜泊×圣塔伊内斯杂交羔羊，于群体栏舍中舍饲60天，采用完全随机设计，每组设置6个重复。屠宰后，通过对比检验分析半膜肌与半腱肌的各项参数平均值。结果表明，日粮中添加棉籽可提高蒸煮损失与灰分含量，降低肌肉重量、持水力与红度值。在未添加木质素磺酸钙的日粮中，对棉籽进行粉碎处理可降低剪切力；而在添加该添加剂的日粮中，棉籽粉碎处理可提高蛋白质含量与蒸煮损失，降低pH值。无论日粮是否添加木质素磺酸钙，棉籽粉碎处理均可提高肉品的亮度值。添加木质素磺酸钙可提高肌肉重量、蛋白质含量、灰分含量、pH值、剪切力与红度值。日粮处理对水分含量、粗脂肪含量与黄度值无显著影响。尽管棉籽日粮会改变肉品的理化特性，但无论是否添加木质素磺酸钙，均不会对肉品品质产生影响。