摘要
文章旨在研究黄芪多糖对大口黑鲈生长、消化功能与形体指标的影响,试验将600尾大口黑鲈设定了对照组(饲喂基础日粮)、处理1组(基础日粮+500mg/kg黄芪多糖)、处理2组(基础日粮+1000mg/kg黄芪多糖)、处理3组(基础日粮+1500mg/kg黄芪多糖),养殖为期56d。结果表明:黄芪多糖不同添加量均有利于提高大口黑鲈的增重率(P<0.05),且处理2组增重率最高;与对照组相比,添加黄芪多糖的处理组饲料系数有显著下降趋势(P<0.05),且处理2组的饲料系数最低(P<0.05)。黄芪多糖不同添加量均有利于提高大口黑鲈的肥满度、脏体比与肝体比(P<0.05);添加黄芪多糖的各处理组胃及肠道的蛋白酶、淀粉酶及脂肪酶活性与表观消化率、蛋白质表观消化率皆要高于对照组(P<0.05),且随着黄芪多糖添加量的增多,胃及肠道蛋白酶、淀粉酶、脂肪酶活性与表观消化率、蛋白质表观消化率有先升高、再降低的趋势,均在添加量为1000mg/kg时达到最高(P<0.05)。由此认为,日粮中添加适量的黄芪多糖可以提高大口黑鲈的生长性能,改善形体指标。
To investigate the effects of Astragalus polysaccharides on the growth,digestive function,and body indicators of Micropterus salmoides,600 M.salmoides were selected in this study,and a control group(fed with basic diet,FB),treatment group 1(FB+500mg/kg Astragalus polysaccharides),treatment group 2(FB+1000 mg/kg Astragalus polysaccharides),and treatment group 3(FB+1500 mg/kg Astragalus polysaccharides)were set up for a cultivation period of 56 days.The results showed that different amounts of Astragalus polysaccharides added were beneficial for improving the weight gain rate of M.salmoides(P<0.05)and treatment group 2 showed the highest weight gain rate;The treatment groups showed significant decrease in feed coefficient compared to the control group(P<0.05),and the feed coefficient of treatment group 2 was the lowest.Different amounts of Astragalus polysaccharides added are beneficial for improving the plumpness,organ to body ratio,and liver to body ratio of M.salmoides(P<0.05);The protease,amylase,and lipase activities,apparent digestibility,and protein apparent digestibility in the stomach and intestines of each treatment group were higher than those in the control group(P<0.05).Moreover,with the increase of astragalus polysaccharide addition,the protease,amylase,lipase activities,apparent digestibility,and protein apparent digestibility in the stomach and intestines showed a trend of first increasing and then decreasing,all reaching their highest levels at a dosage of 1000 mg/kg.It is believed that adding an appropriate amount of Astragalus polysaccharides to the diet can improve the growth performance and body indicators of M.salmoides.
作者
邹祥旭
林阿朋
吴建顾
邹文瑞
卫少松
齐富刚
ZOU Xiangxu;LIN Apeng;WU Jiangu;ZOU Wenrui;WEI Shaosong;QI Fugang(Jiangsu Agri-animal Huasbandry Vocational College,Taizhou,Jiangsu Province 225300,China;Shuyang Fengmiao Ecological Agriculture Farm,Shuyang,Jiangsu Province 223600,China;Yunqian(Nanjing)Biotechnology R&D Co.,Ltd,Nanjing,Jiangsu Province 210000,China)
出处
《中国饲料》
北大核心
2024年第16期65-68,共4页
China Feed
基金
菌藻共固定化养殖水环境生物改良研究(NSF2021ZR13)
水产功能菌藻开发及应用(NSF2023TC05)。
关键词
大口黑鲈
黄芪多糖
形体指标
消化功能
Micropterus salmoides
astragalus polysaccharides
physical indicators
digestive function
