Eight Anglo-Nubian goats with 42.06 ± 3.5 kg body weight (BW) and 51 ± 4.0 d in milk were randomly assigned in a double 4 × 4 Latin square experiment with 20-d periods and four diets with different concentrations of crude glycerin (0, 70, 140 and 210 g/kg on DM basis) to evaluate the effects on intake and on production, composition, fatty acid (FA) profile and sensory traits of milk. The inclusion of crude glycerin from waste frying oils in the goat diets linearly decreased the intake of DM (P=0.001), NDF (P<0.001) and NFC (P=0.007), goat milk production (P=0.006), 4% fat-corrected milk production, (P=0.007), milk composition of total solids, (P=0.006) fat (P=0.005), protein (P=0.03), lactose (P=0.006), total solids (P=0.005), nonfat solids (P=0.005), saturated FA C14:0 (P<0.001) concentrations, short- (P<0.001) and medium-chain (P=0.002) FA proportions and atherogenicity index of fat milk. There was a quadratic increase of EE intake (P=0.002), fat and lactose (P=0.03) milk composition and linear increases in unsaturated FA (P<0.001), monounsaturated (MUFA; P<0.001), UFA:ΣSFA (P=0.002), MUFA:ΣPUFA (P=0.001), all long-chain FA (P<0.001), Σcis C18:1 (P<0.001), and the activity levels of Δ⁹desaturase 18 (P=0.008) and elongase (P<0.001) with crude glycerin inclusion in the diets of milk goats. The water intake, milk concentration (g/kg) of CP and SNF, C16:0, C18:0 and C18:2 cis-9, trans-11 FAs, polyunsaturated (PUFA), n-3, n-6, and n-6:n-3 ratio, Trans:C18:0, activity of Δ⁹desaturase 14 and 16, and sensory attributes (odor and flavor) of milk were not affected by crude glycerin intake (P>0.05). Crude glycerin from waste frying oils (36% glycerol and 26% EE) inclusion up to 210 g/kg in total DM replacing corn ground in diets of lactating goats improves milk solids composition and fatty acid profile, which it is desirable for the industry of dairy products, however, it reduce DMI, production and total solids milk, without effects on sensory attributes.

在两次4×4拉丁方试验中，随机分为8只体重为42.06±3.5千克体重（BW），牛奶为51±4.0 d的盎格鲁-努比亚山羊，进行20天周期和四种不同粗甘油浓度的饮食（0 ，70、140和210 g / kg（以DM为基础），以评估对牛奶的摄入量，产量，成分，脂肪酸（FA）概况和感官特性的影响。山羊日粮中的废煎炸油中含有粗甘油会线性减少DM（P = 0.001），NDF（P <0.001）和NFC（P = 0.007），山羊奶产量（P = 0.006），4％经脂肪校正的牛奶产量（P = 0.007），牛奶的总固体成分（P = 0.006）脂肪（P= 0.005），蛋白质（P = 0.03），乳糖（P = 0.006），总固体（P = 0.005），脱脂固体（P = 0.005），饱和FA C14：0（P <0.001）浓度，短（P <0.001）和中链（P = 0.002）FA比例和脂肪乳的动脉粥样硬化指数。EE摄入量（P = 0.002），脂肪和乳糖（P = 0.03）呈二次方增加，不饱和脂肪酸（P <0.001），单不饱和脂肪酸（MUFA; P <0.001），UFA：ΣSFA（P = 0.002），MUFA：ΣPUFA（P = 0.001），所有长链FA（P<0.001），Σ顺式C18：1（P <0.001），和Δ的活性水平⁹去饱和酶18（P = 0.008）和延伸酶（P <0.001）与粗甘油包括在奶山羊的饮食。摄水量，CP和SNF的牛奶浓度（g / kg），C16：0，C18：0和C18：2顺式-9，反式-11 FA，多不饱和脂肪酸（PUFA），n-3，n-6和的n-6：N- 3的比例，反式：C18：0，Δ的活性⁹去饱和酶14和16，和感官属性（气味和味道）的牛奶并没有受到影响粗甘油的摄入（P> 0.05）。废油炸油中的粗甘油（36％甘油和EE含量为26％）以DM总量计高达210 g / kg代替了泌乳山羊日粮中的玉米粉，改善了乳固体成分和脂肪酸谱，这对于乳制品，但是，它减少了DMI，产量和总固体奶量，而不影响感官属性。