3种不同的饲料对中华绒螯蟹生长、体组成及肌肉游离氨基酸的影响

Effects of three different kinds of feeds on growth,body composition and muscular free amino acids of Eriocheir sinensis

以初始体重(8.65±0.64)g的中华绒螯蟹为研究对象,通过5周室内养殖试验,研究3种不同品牌的商品饲料(发酵豆粕料组、普通料1组,普通料2组)对中华绒螯蟹的生长、体组成及肌肉游离氨基酸的影响。结果表明,摄食发酵豆粕料组中华绒螯蟹在壳长、壳宽、增重率、特定生长率、饲料系数均与普通料1和2组无显著性差异(P> 0.05),但存活率显著高于其他组(P<0.05)。肌肉粗蛋白质、粗脂肪、粗灰分各组之间无显著性差异(P>0.05)。发酵豆粕料组幼蟹肌肉中的总游离氨基酸含量及总呈味游离氨基酸含量均低于普通料1组,高于普通料2组,但呈味游离氨基酸总量占总游离氨基酸的百分比大于其他两组。这表明投喂含适量发酵豆粕的饲料能提高中华绒螯蟹存活率和肌肉风味。

Eriocheir sinensis with the initial body weight(8.65 + 0.64)g were selected as the research animals and were fed three diets(fermented soybean meal group,ordinary material 1 group,ordinary material 2 group)in the indoor cultivation experiment for 5 weeks,then the growth performance,body composition and free amino acids in muscle of the crabs were detected for assessing the effects of the three diets. The results showed that :Shell length,shell width,weight gain rate,specific growth rate and feed coefficient were no significantly difference among all groups(P >0.05),but the survival rate of the crabs in fermented soybean meal group was significantly higher than other groups(P <0.05). There were no significant difference among all groups in muscle crude protein,crude fat and crude ash(P >0.05). The free amino acids concentrations and total flavor free amino acids concentrations in muscle of fermented soybean meal group were lower than the ordinary material 1 group,but were higher than ordinary material 2 group. While the percentage of total flavor free amino acids in the total free amino acids were greater than the other two groups. The results showed that feeding fermented soybean meal could improve the survival rate and muscle flavor of Eriocheir sinensis.