饲粮能量水平对德州驴生长性能、营养物质消化率及血清生化指标的影响

Effects of Dietary Energy Level on Growth Performance,Nutrient Digestibility and Serum Biochemical Indices of Dezhou Donkeys

本研究旨在探讨饲粮能量水平对德州驴生长性能、营养物质消化率及血清生化指标的影响。试验选用健康的7~8月龄德州公驴36头,体重(123.9±5.0) kg,随机分为3个组,每组3个重复,每个重复4头驴。各组饲粮消化能水平分别为10.43 (低能组)、11.03 (中能组)和11.90 MJ/kg(高能组),粗蛋白质水平相近。预试期20 d,正试期40 d。结果表明:1)中能组和高能组的平均日增重显著高于低能组(P<0.05),且高能组的平均日增重显著高于中能组(P<0.05)。中能组和高能组的料重比显著低于低能组(P<0.05),且高能组的料重比显著低于中能组(P<0.05)。2)中能组和高能组的干物质、有机物和碳水化合物消化率显著高于低能组(P<0.05),且高能组的干物质、有机物和碳水化合物消化率显著高于中能组(P<0.05)。3)高能组的血清总蛋白、甘油三酯含量显著高于中能组和低能组(P<0.05)。中能组和高能组的血清白蛋白含量显著高于低能组(P<0.05),且高能组的血清白蛋白含量显著高于中能组(P<0.05)。中能组和高能组的血清乳酸脱氢酶活性显著低于低能组(P<0.05),且高能组的血清乳酸脱氢酶活性显著低于中能组(P <0.05)。由此可见,在本试验饲粮能量水平范围内(10.43~11.90 MJ/kg),饲喂高能量水平(11.90 MJ/kg)饲粮能够较好地提高德州驴的平均日增重,同时提高干物质、有机物和碳水化合物消化率,降低料重比。

The object of this study was to investigate the effects of dietary energy level on growth performance,nutrient digestibility and serum biochemical indices of Dezhou donkeys. Thirty-six healthy Dezhou male donkeys aged from 7 to 8 months with similar body weight of(123.9±5.0)kg were selected and randomly divided into 3 groups with 3 replicates in each group and 4 donkeys in each replicate. Dietary digestible energy levels of3 groups were 10. 43(low energy group),11. 03(mid energy group)and 11. 90 MJ/kg(high energy group),respectively,and the crude protein levels were similar. The adaptation period was 20 days and the experimental period was 40 days. The results showed as follows:1)the average daily gain of mid energy group and high energy group was significantly higher than that of low energy group(P<0.05),and the average daily gain of high energy group was significantly higher than that of mid energy group(P<0.05). The feed to gain ratio of mid energy group and high energy group was significantly lower than that of low energy group(P<0.05),and the feed to gain ratio of high energy group was significantly lower than that of mid energy group(P<0.05). 2)The dry matter,organic matter and carbohydrate digestibility of mid energy group and high energy group was significantly higher than that of low energy group(P<0.05),and the dry matter,organic matter and carbohydrate digestibility of high energy group was significantly higher than that of mid energy group(P<0.05). 3)The serum total protein and triglyceride contents of high energy group were significantly higher than those of mid energy group and low energy group(P<0.05). The serum albumin content of mid energy group and high energy group was significantly higher than that of low energy group(P<0.05),and the serum albumin content of high energy group was significantly higher than that of mid energy group(P<0.05). The serum lactate dehydrogenase activity of mid energy group and high energy group was significantly lower than that of low energy group(P<0.05),and the serum lactate dehydrogenase activity of high energy group was significantly lower than that of mid energy group(P<0.05). In conclusion,in the range of dietary energy level in this experiment(10.43 to 11.90 MJ/kg),feeding high energy level diet can better improve the average daily gain of Dezhou donkeys,improve the dry matter,organic matter and carbohydrate digestibility,and decrease the feed to gain ratio.[Chinese Journal of Animal Nutrition,2022,34(2):1158-1164]