The objective of the present study was to determine the needs of milk intake (MI) and their components (i.e., lactose, fat, protein, and energy) to increase the average daily gain (ADG) of Pelibuey lambs during the pre-weaning period. Data of 62 lambs were used (35 males and 27 females; 32 of single lambing and 30 twins). All lambs were housed in individual pens with their mothers during the first 45 days post-lambing, without access to mother’s food. Every 10 d, MI was estimated by the double lamb weighing method, and then, the intake of each milk component was calculated, considering both milk chemical composition and its estimated intake. The ADG was associated with MI and its components through a linear regression analysis. All milk variables were highly (P < 0.05; 0.69 ≤ r ≤ 0.85) correlated with ADG. The ADG explained (P < 0.0001) between 48 and 72% of the variation observed for MI and its components, being lower for fat intake and higher for MI. Given the positive slope parameter (β1), an increase of one kilogram of body weight required intakes of 3.1 kg of milk, 117 g of fat, 203 g of protein, 187 g of lactose, or 16.8 MJ of energy. In conclusion, Pelibuey lambs to gain one kilogram of live weight during the pre-weaning period need to consume 3.1 kg of milk having an adequate amount of protein, fat, lactose, and energy.

本研究的目的是确定断奶前断奶期间母乳摄入量（MI）及其成分（即乳糖，脂肪，蛋白质和能量）的需求，以增加Pelibuey羔羊的平均日增重（ADG）。 。使用了62只羔羊的数据（雄性35只，雌性27只；单胎32只，双胞胎30只）。在产羔后的头45天内，所有的羔羊都与母亲一起放在单独的圈舍中，无法获得母亲的食物。每隔10天，通过双羊羔称量法估算MI，然后在考虑牛奶化学成分及其估算摄入量的基础上计算每种牛奶成分的摄入量。通过线性回归分析，ADG与MI及其成分相关。所有乳变量是高度（P  <0.05; 0.69≤  [R ≤0.85）与ADG相关。ADG解释 了在MI及其成分中观察到的变化的48％至72％之间（P <0.0001），脂肪摄入较低，MI较高。给定正斜率参数（β1），每增加1千克体重，就需要摄入3.1千克牛奶，117克脂肪，203克蛋白质，187克乳糖或16.8兆焦耳的能量。总之，在断奶前要增加1公斤活重的Pelibuey羔羊需要消耗3.1公斤牛奶，其中含有足够的蛋白质，脂肪，乳糖和能量。