Abstract

Growth performance and meat quality traits of 24 Massese suckling lambs reared up to 69 days of age in different farming systems were evaluated. Three groups were considered: stall (S) reared indoors and fed concentrate and hay; pasture (P) reared outdoor and fed pasture and hay; semi free-range (F) reared indoors during the night and at pasture during the day, fed concentrate, hay and herbage. The lambs remained constantly with their dams for the whole period, having thus always access to mothers’ milk. Animals weights were recorded, and, after slaughtering, carcase traits were considered. Fatty acids composition and chemical/physical parameters of milk and meat were analysed. Lambs growth was similar in the first 30 days, while afterwards differences emerged: P lambs recorded the worst values reaching slaughter weight of 14.6 kg versus 22.3 and 22.7 of the S and the F group, respectively. Carcase of P lambs resulted less fat and with a lower lean/bone ratio than the other groups (1.8, 2.1 and 2.3 for P, S and F, respectively). Fatty acids composition of ewes’ milk had effect on lambs’ meat profile, probably because they continued to suck milk until slaughter. Moreover, also farming system affected fatty acids profile of lambs’ meat: grazing animals, especially P, showed the highest PUFA and the lowest SFA percentage and P meat showed the best composition for human health. As regards physical traits, F meat was more coloured than P and S meat, while P meat was less tender than others.

• Highlights

• Two-month-old Massese lamb is a marketable product.

• Suckled milk affected lambs’ meat composition also at later ages.

• Pasture in lambs’ diet increases PUFA content in the meat.

摘要

评价了在不同耕作系统中饲养的69天龄以下的24只Massese哺乳羔羊的生长性能和肉质性状。考虑了三类：在室内饲养的摊位（S），饲喂精矿和干草；牧场（P），在室外饲养，饲喂牧场和干草；半散养（F）于夜间在室内饲养，白天在牧场上饲养，饲喂精矿，干草和牧草。在整个时期中，羔羊始终与水坝保持在一起，因此总是可以获取母乳。记录动物的体重，并在屠宰后考虑尸体特征。分析了牛奶和肉的脂肪酸组成以及化学/物理参数。羔羊的生长在开始的30天内是相似的，但是之后出现了差异：羔羊的屠宰量最差，达到了14.6公斤，而同期为22头。S和F组分别为3和22.7。case羊羔的脂肪含量比其他组少（瘦肉，瘦肉和瘦肉分别为1.8、2.1和2.3）。母羊牛奶中的脂肪酸组成对羔羊的肉质有影响，可能是因为它们继续吮吸牛奶直到被宰杀。此外，耕作制度也影响了羔羊肉的脂肪酸分布：放牧的动物，尤其是P，显示出最高的PUFA和最低的SFA百分比，P肉显示出对人体健康最佳的成分。就身体特征而言，F肉的颜色比P和S肉的颜色多，而P肉的柔韧性不如其他。母羊牛奶中的脂肪酸组成对羔羊的肉质有影响，可能是因为它们继续吮吸牛奶直到被宰杀。此外，耕作制度也影响了羔羊肉的脂肪酸分布：放牧的动物，尤其是P，显示出最高的PUFA和最低的SFA百分比，P肉显示出对人体健康最佳的成分。就身体特征而言，F肉的颜色比P和S肉的颜色多，而P肉的柔韧性不如其他。母羊牛奶中的脂肪酸组成对羔羊的肉质有影响，可能是因为它们继续吮吸牛奶直到被宰杀。此外，耕作制度也影响了羔羊肉的脂肪酸分布：放牧的动物，尤其是P，显示出最高的PUFA和最低的SFA百分比，P肉显示出对人体健康最佳的成分。就身体特征而言，F肉的颜色比P和S肉的颜色多，而P肉的柔韧性不如其他。

• 强调

• 两个月大的Massese羔羊是可销售的产品。

• 乳汁也影响羊羔的肉成分。

• 羔羊饮食中的牧场会增加肉中的PUFA含量。