Morin D E, Rowan L L, Hurley W L, Braselton W E
Department of Animal Sciences, University of Illinois, Urbana 61801, USA.
J Dairy Sci. 1995 Aug;78(8):1713-20. doi: 10.3168/jds.S0022-0302(95)76796-0.
Neonatal llamas must receive supplemental milk when the dam has inadequate milk yield or fails to accept the cria. Data on llama milk composition are limited, and selection of suitable milk supplements has been difficult. Milk from 83 llamas on eight farms in four states (Illinois, Kentucky, Michigan, and Colorado) was collected, and milk composition was analyzed. Llamas had no history or signs of mastitis, and major mastitis pathogens were not isolated from the milk. Total solids were determined gravimetrically. A colorimetric method, a dye-binding assay, and the modified Mojonnier method were used to quantify lactose, protein, and fat, respectively. Concentrations of seven macrominerals and 17 trace elements were obtained by inductively coupled plasma atomic emission spectroscopy, and Cl was quantified by anion chromatography. Llama milk was higher in sugar (6.5%) and lower in fat (2.7%) and energy content (70.0 kcal/100 g) than milks of domestic ruminants. Llama milk also contained more Ca and less Na, K, and Cl. In general, milk composition was not affected by stage of lactation, lactation number, or body condition score of the llama, but several milk constituents varied among farms.
当母羊产奶量不足或不接受小羊时，新生小羊驼必须接受补充奶。关于羊驼奶成分的数据有限，选择合适的奶补充剂一直很困难。收集了来自四个州（伊利诺伊州、肯塔基州、密歇根州和科罗拉多州）八个农场的83只羊驼的奶，并对奶成分进行了分析。羊驼没有乳腺炎病史或症状，且未从奶中分离出主要的乳腺炎病原体。通过重量法测定总固体含量。分别采用比色法、染料结合法和改良莫乔尼尔法对乳糖、蛋白质和脂肪进行定量分析。通过电感耦合等离子体原子发射光谱法测定七种常量矿物质和17种微量元素的浓度，通过阴离子色谱法定量分析氯含量。与家养反刍动物的奶相比，羊驼奶的糖分含量较高（6.5%），脂肪含量较低（2.7%），能量含量较低（70.0千卡/100克）。羊驼奶还含有更多的钙，而钠、钾和氯的含量较少。一般来说，奶的成分不受羊驼泌乳阶段、泌乳次数或体况评分的影响，但不同农场的几种奶成分有所不同。
