不同粗蛋白质水平全混合颗粒日粮对马头山羊生长性能及血液生化指标的影响

本研究旨在探讨不同粗蛋白质水平全混合颗粒日粮对育肥期马头山羊的生长性能及血液生化指标的影响。选用3～4月龄马头山羊羯羔36只,随机分为4组,分别饲喂粗蛋白质水平为16.15%(对照组)、14.54%(试验1组)、12.92%(试验2组)和11.31%(试验3组)的全混合颗粒日粮,进行育肥试验。预试期18 d,正试期42 d。结果表明:试验3组马头山羊的平均日增重(0.17 kg/d)高于试验2组(P<0.05),对照组、试验1组和试验2组平均日增重差异不显著;试验3组马头山羊的血清尿素氮高于其他各组(P<0.05),谷草转氨酶/谷丙转氨酶低于其他各试验组(P<0.05),谷丙转氨酶低于对照组和试验1组(P<0.05)。在本试验条件下,马头山羊育肥期全混合颗粒日粮中适宜的粗蛋白质水平为11.31%,不同粗蛋白质水平全混合颗粒日粮对马头山羊血液生化指标均没有不良影响。

Effects of Different Crude Protein Levels of Formulated Pellet Diets on Growth Performance and Blood Biochemical Parameters of Matou Goats

The purpose of this study was to investigate the effects of different crude protein levels of formulated pellet diets on growth performance and blood biochemical parameters of Matou Goats during the fattening period. Thirty-six wethers at the age of 3 to 4 months old were randomly divided into 4 groups, which were fed formulated pellet diets with crude protein level of 16.15%(group control), 14.54%(group 1), 12.92%(group 2) and 11.31%(group 3). Results showed that the average daily weight gain of group 3(0.17 kg/d) was higher than that of group 2(P<0.05), and no difference of average daily weight was observed among group control, group 1 and 2. In terms of blood biochemical parameters, the serum urea nitrogen of group 3 was higher than that of other three groups(P<0.05), while the ratio of aspartate aminotransferase/alanine aminotransferase of group 3 was lower comparison with other three groups(P<0.05). Besides, the alanine aminotransferase of group 3 was lower than that of group control and group 1(P<0.05). According to the current study, the most suitable crude protein level of formulated pellet diets was 11.31% for Matou goats during the fattening period, and all the four crude protein levels was not harmful to blood biochemical indicators of Matou goats.