摘要
以饲料中鱼粉添加量为36%(质量分数)作为对照组(A组,粗蛋白质的质量分数为40%),用花生粕分别替代饲料配方中10%、20%、30%、40%、50%的鱼粉,配成5种等氮对虾试验饲料(B^F组),饲喂凡纳对虾Litopeaneus vannam ei56 d,研究了不同饲料对凡纳对虾生长性能和虾体氨基酸组成的影响。结果表明:饲养28 d时,各饲料组凡纳对虾的增重率、成活率、饲料系数、蛋白质效率均无显著差异(P>0.05)。饲养56 d时,随着用花生粕替代鱼粉比例的增加,对虾的增重率呈现下降趋势,F组对虾增重率仅为1932.4%,显著低于其他饲料组(P<0.05);对虾成活率也呈现降低的趋势,但组间并无显著差异;各组饲料系数亦无显著差异(P>0.05);当用花生粕替代鱼粉超过30%时,D、E、F组蛋白质效率均显著低于对照组(P<0.05);随着用花生粕替代鱼粉比例的增加,虾体的蛋氨酸呈现与饲料蛋氨酸含量同步降低,而精氨酸呈现同步增加的变化趋势。综合各项指标,说明凡纳对虾饲料中用花生粕替代20%鱼粉是完全可行的。
A 56 d feeding - trial was conducted to evaluate the effects of replacement of fish meal with peanut meal in practical diets on growth performance and amino acid profile of Pacific white shrimp Ltopenaeus vannamei. Six isonitrigenous diets were formulated to contain 40% protein and 6.5% lipid. Fish meal contained in the diets at a rate of 36% was replaced by peanut meal at six inclusion levels of 0, 10%, 20%, 30%, 40% and 50% （diets 1 - 6 ）. The shrimp juveniles with O. 246 g mean initial body weight were distributed in 260 L tanks at a rate of 30 shrimp per tank, using a completely randomized design with six treatments and three replicate groups per treatment, and fed four times daily. Survival, growth, feed conversion ratio （FCR） and protein emciency ratio were not significantly affected by the dietary treatments in 4 weeks. However, in 8 weeks, weight gain decreased with increasing inclusion of peanut meal. The shrimp fed diet 6 had significantly lower weight gain （ 1932.4% ） than those fed other experimental diets. Survival and FCR were no significantly different among the treatments. However, protein efficiency was significantly lower （2.01,2.09 and 2.08, respectively） for diet 4, 5, and 6 than that in the control, when replacement of fish meal by peanut meal inclusion up to 30%. Amino acids profile of shrimp was varied with replacement fish meal by peanut meal. Content of methionine in the shrimp decreased with increasing dietary inclu- sion of peanut meal. For musclular arginine and methionine, however, there was decrease with increase in inclusion levels of peanut meal. Based on WG, PER, survival and amino acid content of the shrimp, it was feasible to replace fish meal with peanut meal at level of 20% or so.
出处
《大连水产学院学报》
CAS
CSCD
北大核心
2008年第5期370-375,共6页
Journal of Dalian Fisheries University
基金
武汉市晨光计划项目(200750731287)
关键词
凡纳对虾
生长
饲料
鱼粉
花生粕
Litopenaeus vannamei
growth
feed
fish meal
peanut meal
