ABSTRACT

To evaluate dietary addition of soybean oil (SBO) on growth, rumen fermentation, carcass and meat traits, 21 male Rambouillet lambs (2.5-mo-old and weighing 18 ± 1.45 kg) were distributed randomly to a diet with 0, 25 or 50 g SBO/kg dry matter. Trial lasted 60 d. Dietary SBO did not affect growth, carcass traits or muscle conformation. Energy intake, dorsal fat and fatness degree, as well as rumen pH, acetate and acetate:propionate ratio had a linear increment (P < .05) with larger amounts of SBO in the diet. Also, increased SBO levels in the diet linearly augmented (P < .05) meat brightness (L*), muscle fat content and C18:1 t11 and C18:2 proportion. Dietary SBO at 50 g/kg DM for finishing lambs may be a feeding option to reduce the amount of energy from grains in the diet and favour deposition of fatty acids in meat that can benefit consumer health.

摘要

为了评估膳食中添加大豆油（SBO）的生长，瘤胃发酵，car体和肉质性状，将21只雄性朗布依埃羔羊（2.5个月大，体重18±1.45千克）随机分配到0、25或50的饮食中g SBO /千克干物质。试用持续60 d。饮食中的SBO不会影响生长，car体性状或肌肉构象。能量摄入，背侧脂肪和脂肪度以及瘤胃pH，乙酸盐和乙酸盐：丙酸酯的比例呈线性增加（P  <.05），其中饮食中的SBO量较大。同样，日粮中SBO水平的增加线性增加（P  <.05）肉亮度（L*），肌肉脂肪含量和C18：1 t11和C18：2比例。饲喂羔羊的日粮SBO的量为50 g / kg DM，可以减少日粮中谷物的能量并促进脂肪酸在肉中的沉积，从而有益于消费者健康。