Instituto de Ganadería de Montaña, CSIC-Universidad de León, Finca Marzanas s/n, 24346, Grulleros, León, Spain.
Facultad de Veterinaria, Universidad de León, Campus Vegazana s/n, 24071, León, Spain.
Meat Sci. 2018 Jan;135:20-26. doi: 10.1016/j.meatsci.2017.08.007. Epub 2017 Aug 19.
The objective of the study was to determine the effect of early feed restriction on carcass and meat quality traits in Merino lambs. Twenty-four male Merino lambs (4.81±0.256kg) were assigned to two groups (12 animals in each group). The first group (ad libitum, ADL) was kept permanently with the dams. The second group (restricted, RES) was milk-restricted. After weaning (15kg), daily feed intake of all lambs was identical, but a lower gain: feed ratio was recorded in the RES group (0.320 vs. 0.261; P<0.001). After animals were slaughtered (27kg), lower ultimate pH and reduced yellow colouration of subcutaneous fat was recorded in meat from the RES lambs when compared to ADL group, whereas a trend towards a significant increment of intramuscular fat content and no effect on meat quality traits was observed in the RES lambs. Early feed restriction may be useful to increase intramuscular fat accretion in Merino lambs during the fattening period.
本研究旨在确定早期限饲对美利奴羔羊胴体和肉质特性的影响。将 24 只雄性美利奴羔羊（4.81±0.256kg）分为两组（每组 12 只动物）。第一组（自由采食，ADL）与母羊永久饲养。第二组（限制组，RES）进行牛奶限制。断奶后（15kg），所有羔羊的日采食量相同，但 RES 组的增重：饲料比记录较低（0.320 比 0.261；P<0.001）。在动物被屠宰（27kg）后，与 ADL 组相比，RES 组羔羊的肉中最终 pH 值较低，皮下脂肪的黄色度降低，而 RES 组羔羊的肌肉内脂肪含量呈增加趋势，但对肉质特性没有影响。早期限饲可能有助于增加肥育期美利奴羔羊的肌肉内脂肪沉积。
