猪乳中常规成分、胰鸟素和表皮生长因子浓度的动态变化

选择8头3～4胎、产仔9～13头的健康大长北(大约克×长白×北京黑猪)母猪，对其分娩后35d泌乳期内初乳和常乳中的常规成分、胰岛素和表皮生长因子进行了动态分析。结果表明，母猪刚分娩时其初乳中乳蛋白、总固型物、胰岛素和表皮生长因子的浓度均高于常乳(P<0.05)，乳糖和乳脂则随泌乳期延长而增加，分娩后3d内这种变化显著(P<0.05)，而常乳中则变化不明显。

Dynamic Change in Concentration of Conventional Ingredients,Insulin and Epidermal Growth Factor in Colostrum and Milk of Sows

Milk samples were collected from 8 normal 3 4 year old large white sow.Landrace and beijingblack lactation sows that had farrowed litters containing 9 13 live piglets.Within 35 days the dynamic change in the concentration of conventional ingredients,insulin and EFG in colostrum and milk were determined.The results indicated the change in the concentration of total solids,protein,insulin and EFG were significant bettween colostrum and milk.The concentration of total solids,protein,EFG and insulin are very high in colostrum.The concentration of lactose and fat significantly increased by time of lactation,especially in colostrum.But the change of concentration of lactose and fat in milk are not significantly.