Sezione Allevamenti Zootecnici, Dipartimento di Protezione e Valorizzazione Agroalimentare DIPROVAL, Facoltà di Agraria, Università di Bologna, 42100 Reggio Emilia, Italy.
Meat Sci. 1999 Apr;51(4):391-9. doi: 10.1016/s0309-1740(98)00160-0.
The effect of loading method and stocking density in transit on meat and dry-cured ham quality was investigated in pigs with different halothane genotypes. A total of 507 Italian heavy pigs, supplied by two farms, were loaded by ramp or lift and transported unmixed for 35-55 min to the abattoir at a stocking density of either <0.4 or >0.6m(2) per 100 kg pigs. After overnight lairage in separate pens with free access to water, the pigs were slaughtered. Halothane genotype was assessed post mortem. Four hundred and thirty-nine pigs had a homozygous dominant (NN) genotype and 68 pigs were heterozygous (Nn). Carcass skin damage, meat quality traits and ham curing parameters were evaluated. Loading method and stocking density showed a negligible effect on meat and dry-cured ham quality while the predominant factor affecting these was the halothane genotype. Nn pigs produced meat with a faster rate of pH fall and lower water holding capacity as well as ham with higher weight losses in salting and greater incidence of defects in the dry-cured product. There were insignificant interactions between halothane genotype and loading method or stocking density. Overall, irrespective of pre-slaughter treatment, the Nn pigs were less suitable for the production of high quality products such as dry-cured ham.
不同氟烷基因型猪在运输过程中装载方式和堆垛密度对肉和干腌火腿质量的影响。总共 507 头意大利重型猪，由两个农场提供，通过斜坡或升降梯装载，在运输过程中混合 35-55 分钟，堆垛密度<0.4 或>0.6m(2)每 100 公斤猪。在单独的畜栏中过夜休息，自由饮水后，猪被屠宰。死后评估氟烷基因型。439 头猪为纯合显性（NN）基因型，68 头猪为杂合（Nn）基因型。评估了胴体皮肤损伤、肉质特性和火腿腌制参数。装载方式和堆垛密度对肉和干腌火腿质量的影响可以忽略不计，而影响这些的主要因素是氟烷基因型。Nn 猪生产的肉具有更快的 pH 值下降速度和更低的持水力，以及在腌制过程中更高的重量损失和更严重的干腌产品缺陷。氟烷基因型与装载方式或堆垛密度之间没有显著的相互作用。总的来说，无论宰前处理如何，Nn 猪不太适合生产高质量的产品，如干腌火腿。
