Ulbrich M, Eibicht R, Geissler C, Boldt E, Hoffmann M
Sektion Tierproduktion und Veterinärmedizin der Karl-Marx-Universität Leipzig.
Arch Tierernahr. 1987 Jul-Aug;37(7-8):651-64. doi: 10.1080/17450398709425380.
In a digestibility experiment with 4 X 4 calves the animals received 100 g mixture for calves, 50 g dried green fodder and either 656 g dried whole milk and 164 g dried skim milk (VM) or 656 g dried whole milk and 164 g added fat. The added fat consisted of a mixture of tallow and lard in a 1:1 ratio plus 10% emulgator ES 20 (FE) or 8% ES 20 and 2% soybean lecithin (FL) or 25% lard, 25% tallow, 40% rape/sunflower oil with 10% ES 20 (FO). The apparent digestibility of the fat amounted to 91% in group VM and in groups FE/FL/FO to 66/70/67% resp. The composition of fatty acids and the use of an unsuitable charge of dried skim milk are considered to be the causes of the low apparent digestibility. The apparent digestibility of the fatty acids decreased with their growing chain length. The higher digestibility of the unsaturated fatty acids is largely caused by changes due to bacterial activity in these fatty acids in the intestines and by the influence of metabolically changed faecal fat. The combination of the synthetic emulgator with lecithin did not improve fat digestion but diminished the total fat content in the blood.
在一项针对4头4月龄犊牛的消化率实验中，动物们分别接受了100克犊牛混合料、50克干青饲料，以及656克全脂奶粉和164克脱脂奶粉（VM组），或者656克全脂奶粉和164克添加脂肪。添加脂肪由牛脂和猪油按1:1比例混合，再加上10%乳化剂ES 20组成（FE组），或者由8% ES 20和2%大豆卵磷脂组成（FL组），又或者由25%猪油、25%牛脂、40%油菜籽/葵花籽油和10% ES 20组成（FO组）。VM组脂肪的表观消化率为91%，而FE/FL/FO组分别为66%/70%/67%。脂肪酸组成和不合适的脱脂奶粉用量被认为是表观消化率低的原因。脂肪酸的表观消化率随着链长的增加而降低。不饱和脂肪酸较高的消化率很大程度上是由于肠道中这些脂肪酸因细菌活动而发生的变化以及代谢改变的粪便脂肪的影响。合成乳化剂与卵磷脂的组合并未改善脂肪消化，但降低了血液中的总脂肪含量。
