文章摘要
饲料中添加氯化钠对草鱼生长和肌肉品质的影响
Effects of dietary sodium chloride on growth and flesh quality of grass carp (Ctenopharyngodon idellus)
投稿时间:2019-09-05  修订日期:2019-09-29
DOI:
中文关键词: 氯化钠  草鱼  生长性能  肌肉品质
英文关键词: sodium chloride  grass carp  growth  flesh quality
基金项目:国家自然科学基金;卓越农林人才培养计划
作者单位E-mail
冀东 水产科学国家级实验教学示范中心(上海海洋大学)农业部鱼类营养与环境生态研究中心(上海海洋大学)水产动物遗传育种中心上海市协同创新中心(上海海洋大学) 1572549507@qq.com 
王璞 水产科学国家级实验教学示范中心(上海海洋大学)  
程卓 水产科学国家级实验教学示范中心(上海海洋大学)  
李小勤 水产科学国家级实验教学示范中心(上海海洋大学)农业部鱼类营养与环境生态研究中心(上海海洋大学)水产动物遗传育种中心上海市协同创新中心(上海海洋大学)  
冷向军 水产科学国家级实验教学示范中心(上海海洋大学)农业部鱼类营养与环境生态研究中心(上海海洋大学)水产动物遗传育种中心上海市协同创新中心(上海海洋大学) xjleng@shou.edu.cn 
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中文摘要:
      为考察饲料中添加氯化钠对草鱼生长性能和肌肉品质的影响,在基础饲料中分别添加0(对照组)、10、20、30和40 g/kg氯化钠,共5组饲料,饲养平均体重(12.26±0.03 g)的草鱼60 d。结果表明,添加10和20 g/kg氯化钠对草鱼增重和饲料系数没有显著影响(P>0.05),但30和40 g/kg氯化钠组的增重率显著低于对照组(P<0.05),饲料系数显著升高(P<0.05)。各组肌肉水分、粗蛋白与粗脂肪含量没有显著差异(P>0.05),但肌肉灰分含量随氯化钠添加量的增加而增加;与对照组相比,各氯化钠添加组的肌肉蒸煮失水率、离心失水率和冷冻失水率(除10 g/kg氯化钠组外)显著增加(P<0.05),10 g和20 g/kg氯化钠组的肌肉总游离氨基酸含量显著升高(P<0.05),20、30和40 g/kg氯化钠添加组的肌肉游离谷氨酸、天冬氨酸含量显著降低(P<0.05);各氯化钠添加组的肌肉硬度及30、40 g/kg氯化钠组的肌肉咀嚼性均显著低于对照组(P<0.05),而肌肉弹性和回复性无显著差异(P>0.05);在肠道组织学方面,30和40 g/kg氯化钠添加组的绒毛高度和绒毛宽度较对照组显著降低(P<0.05),各氯化钠添加组的基层厚度显著增加(P<0.05)。上述结果表明,在饲料中添加氯化钠10-40 g/kg,对草鱼生长性能和肌肉品质没有改善作用。
英文摘要:
      To investigate the effects of adding sodium chloride (NaCl) in diets on the growth performance and flesh quality of grass carp, five diets were prepared with NaCl inclusion at 0 (control diet), 10, 20, 30,40 g/kg and fed to grass carp with an initial body weight of 12.26±0.03 g. After 60 days of feeding, 10 g/kg and 20 g/kg NaCl groups showed the similar growth to the control (P>0.05), while 30 g/kg and 40 g/kg NaCl groups had lower weight gain and higher feed conversion ratio than the control (P<0.05). No significant differences were observed in flesh proximate composition except ash among all the groups (P>0.05), and the ash content increased with the increasing NaCl level. The water-holding capacity was significantly decreased by the supplementation of NaCl except in thawing loss of 10 g/kg NaCl group. The inclusion of 10 and 20 g/kg NaCl increased the total free amino acids contents, but the supplementation of 20, 30,40 g/kg NaCl significantly decreased the contents of free Glu and Asp in flesh (P<0.05). Dietary NaCl decreased the flesh hardness and the supplementation of 30 and 40 g/kg NaCl decreased the flesh chewiness (P<0.05), but there was no significant difference in elasticity and recovery among all the groups (P>0.05). In intestinal histology, the villus height and the villus width of 30 and 40 g/kg NaCl groups were significantly lower than those of the control (P<0.05), and the supplementation of NaCl significantly increased the muscular thickness (P<0.05). In conclusion, the supplementation of NaCl (10-40 g/kg) in diet did not improve the growth performance and flesh quality of grass carp.
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