不同水平的蚯蚓和蚯蚓粪对草鱼肌肉品质的影响

Effect of different levels of earthworms and vermicompost on the flesh quality of grass carp,ctenopharyngodon idellus

实验在基础饲料中添加不同浓度的蚯蚓(5%、7.5%、10%)和蚯蚓粪(2%、4%、6%),饲养平均体重(54.03±0.15)g的草鱼100 d,研究蚯蚓和蚯蚓粪对草鱼肌肉品质的影响。结果表明:添加蚯蚓和蚯蚓粪可显著提高肌肉中粗蛋白的含量(P<0.05),以添加7.5%～10%蚯蚓和6%蚯蚓粪效果最好,对水分、粗脂肪和粗灰分均无显著影响(P>0.05);在肌肉氨基酸总量方面,除去2%蚯蚓粪组与对照组相比差异不显著外,其余实验组均显著高于对照组,并以添加7.5%蚯蚓实验组氨基酸总量最高;在肌肉必需氨基酸含量方面,7.5%蚯蚓组显著高于对照组,其余各实验组有高于对照组的趋势;在肌肉鲜味氨基酸含量方面,各实验组间差异不显著;氨基酸营养价值评价结果表明,添加适量的蚯蚓和蚯蚓粪均可提高EAAI值,以添加7.5%蚯蚓时EAAI值最高。综上所述,添加一定浓度的蚯蚓和蚯蚓粪有改善草鱼肌肉品质的趋势,以添加7.5%蚯蚓时效果最好。

To investigate the effects of earthworms and vermicompost on the flesh quality of grass carp,grass carp with the average body weight（54.03±0.15） g were fed for 100 days by adding 5%,7.5%,10% earthworms or 2%,4%,6% vermicompost in basal diets.The results showed that：adding earthworms and vermicompost could significantly improve the content of crude protein in flesh（P〈0.05）,adding 7.5%～10% earthworms and 6% vermicompost worked the best while had no significant effects on moisture,crude fat and crude ash（P〉0.05）;in the aspect of muscle total amino acids content,almost all test groups were better than the control group except the group added with 2%vermicompost with no difference compared with the control group（P〉0.05）,while the test group added with 7.5% earthworm worked the best;in the aspect of essential amino acids content,the EAA content of adding 7.5% earthworms test group was significantly higher than that of the control group,while the other groups had just a high trend;in the aspect of flavor amino acid concentration in muscle,all the test groups had no difference with the control group;the evaluation results of amino acid nutritional value showed that,diets added with appropriate earthworms and vermicompost can increase EAAI,EAAI was the highest while adding with 7.5% earthworms.In summary,diets added with a certain concentration of earthworms and vermicompost had a trend of improving the flesh quality of grass carp,while adding 7.5% earthworms worked the best.