He Yuhua, Zhong Rongzhen, Cheng Long, You Peihua, Li Yiyong, Sun Xuezhao
The Innovation Centre of Ruminant Precision Nutrition and Smart and Ecological Farming, Jilin Agricultural Science and Technology University, Jilin 132109, China.
Jilin Inter-regional Cooperation Centre for the Scientific and Technological Innovation of Ruminant Precision Nutrition and Smart and Ecological Farming, Jilin 132109, China.
Animals (Basel). 2020 Jan 28;10(2):215. doi: 10.3390/ani10020215.
Lysophospholipids (LPL), a new feed additive, were supplemented to a pelleted total mixed ration (TMR) of dairy cows to examine its effects on feed intake, production, and composition of milk and plasma biochemical parameters. Two dietary treatments included diets supplemented without (control diet; CON) or with LPL at a dose of 0.5 g/kg of pelleted TMR. Twelve multiparous, mid-lactation, Holstein cows (Bodyweight 730 ± 9.3 kg; 100 ± 6.0 days in milk) were randomly assigned to one of the two dietary treatments with a 42-day measurement period after a 14-day adaptation period. Feed and water were provided . Feed intake and milk yields were recorded daily, blood samples were collected fortnightly, and milk samples weekly. The results showed that the supplementation of LPL did not change feed dry matter intake, milk yields, and milk composition. However, it increased total protein and globulin and the activity of alkaline phosphatase and decreased total cholesterol in plasma. This study suggests that LPL may have beneficent effects in animal health but might be not a feasible feed additive to increase production for dairy cows fed a pelleted TMR.
溶血磷脂（LPL）作为一种新型饲料添加剂，被添加到奶牛的颗粒全混合日粮（TMR）中，以研究其对采食量、生产性能、牛奶成分及血浆生化参数的影响。两种日粮处理包括不添加LPL的日粮（对照日粮；CON）和添加剂量为0.5 g/kg颗粒TMR的LPL日粮。12头经产、处于泌乳中期的荷斯坦奶牛（体重730±9.3 kg；泌乳100±6.0天）在经过14天的适应期后，被随机分配到两种日粮处理之一，进行为期42天的测量期。提供饲料和水。每天记录采食量和产奶量，每两周采集一次血样，每周采集一次奶样。结果表明，添加LPL并未改变饲料干物质采食量、产奶量和牛奶成分。然而，它提高了血浆中的总蛋白和球蛋白以及碱性磷酸酶的活性，并降低了总胆固醇。本研究表明，LPL可能对动物健康有有益影响，但对于饲喂颗粒TMR的奶牛而言，可能不是一种可行的用于提高生产性能的饲料添加剂。
