青贮麻竹笋加工剩余物对犊牛生长性能、血清指标和养分消化率的影响

Effects of Ma Bamboo Shoots Remainder Silage on Growth Performance,Serum Indices and Nutrient Apparent Digestibility of Calves

为探索青贮麻竹笋加工剩余物替代断奶犊牛饲料中部分稻草的可行性,以24头体质量相近的健康的安抗杂交(抗旱王牛×安格斯牛)F_1代断奶犊牛为试验动物,随机分成对照组(精料+干稻草)和试验组(精料+70%干稻草+30%青贮麻竹笋加工剩余物),每组12个重复,每个重复1头牛。正试期44 d后计算2组牛的平均日增质量、平均日采食量和料重比,每组选5头牛用代谢笼全收粪法进行为期4 d的消化试验,测定干物质、有机物、粗蛋白、粗脂肪、中性洗涤纤维、酸性洗涤纤维的表观消化率,在试验结束时采集血液测定血清生化指标。结果表明:与对照组相比,试验组的日增质量显著增加20.78%(P<0.05),料重比降低18.10%;试验组的粗蛋白、粗脂肪、干物质、有机物和中性洗涤纤维的表观消化率分别提高了15.64%(P<0.01)、16.94%(P<0.01)、7.42%(P<0.05)、6.95%(P<0.05)和10.85%(P<0.05);试验组的血清生化指标无明显变化。综上,饲料中添加青贮麻竹笋加工剩余物对断奶犊牛的生长性能具有一定的促进作用,青贮麻竹笋加工剩余物应用于断奶犊牛的饲料具有可行性。

In order to investigate the effects of using the Ma bamboo shoots remainder silage instead of straw on calves（ Droughtmaster × Angus）,a total of 24 calves with similar weight were selected and randomly allotted into two groups（ control group： concentrate ＋ straw; treatment group： concentrate ＋ 70% straw ＋ 30% Ma bamboo shoots remainder silage） with 12 replicates. The average daily gain（ ADG）,average daily feed intake（ ADFI） and feed/gain（ F/G） of two groups were calculated after a 44-day trial.Digestion experiment was carried out using 5 calves from each group to detect the apparent digestibility by a 4-day trial. The serums were collected,and serum biochemical indices were tested at the end of the experiment. The results showed that compared with control group,the ADG of treatment group was significantly increased by 20. 78%（ P 〈0. 05）,and the F/G was decreased by 18. 10%; the serum indices of two groups had no significant difference; the digestibility of CP,EE,DM,OM and NDF was increased by 15. 64%（ P 〈0. 01）,16. 94%（ P 〈0. 01）,7. 42%（ P 〈0. 05）,6. 95%（ P 〈0. 05）,10. 85%（ P 〈0. 05）,respectively. In conclusion,the feed containing Ma bamboo shoots remainder silage may improvethe growth performance and nutrient digestibility of calves,indicating a good potential of Ma bamboo shoots remainder used in diet of calves.