摘要
取45周龄罗曼蛋鸡768只，随机分为2组（每组设四个重复，每个重复96只）。在自由采食、饮水和16小时光照条件下，分别饲喂添加0（对照组）、750mg／kg甜菜碱（试验组）的玉米-豆粕型饲粮10周。结果发现，试验组产蛋率比对照组提高了11．23％（P＜0．01），料蛋比降低了8．37％（P＜0．01），而蛋重和日采食量均无明显变化（P＞0．05）；血清总蛋白、白蛋白和极低密度脂蛋白胆固醇含量分别升高了40．99％（P＜0．01）、40．23％（P＜0．01）和38．99％（P＜0．05），而尿酸含量下降了20．28％（P＜0．05）。上述结果提示：甜菜碱通过促进体内蛋白质合成，降低蛋白质分解，而提高产蛋率和饲料利用率。
768 ROM laying hens of about 45 weeks of age were randomly distributed into 2 groups each with 4 replicates of 96 layers. The layers were given a hasal corn-soybean meal diet alone or with betaine 750mg/kg for a period of 10 weeks. Feed and water were provided for ad libitum consumption and the birds received 16h light/day. Results indicated that betaine suplementation significantly increased laying rate (P<O. 01 ) by 11. 23%, and significantly decreased feed/egg ratio (P<O. 01 ) by 8. 37% as compared with control, but egg weight and daily feed Intake were unaffected. Betaine suplementation significantly improved serum concentrations of total protein, albumen, and vary low density lipoprotein-cholesterol by 40. 99% (P<0. 01 ), 40. 23% (P<0. 01 ), and 38. 99% (P<O. 05), respevtively, but uricacid concentraton was significantly reduced by 20. 28% (P<0. 05). These results suggested that betaine supplementation could increase laying rate and feed efficiency by promoting synthesis of protein and reducing degradation of protein.
出处
《宁夏农学院学报》
1998年第4期25-28,共4页
Journal of Ningxia Agricultural College
