中国对虾配合饵料添加维生素的效果

EFFECT OF VITAMINS ON THE GROWTH OF PENAEUS CHINENSIS OSBECK

将维生素作为一个综合指标加以试验,配备5个不同维生素水平(0,0.27,0.54,1.1,2.1％)的饵料试验组,经较长期的室内饲养试验以考察混合维生素对对虾生长和成活率的影响。结果表明,在试验范围内,随着添加维生素份量的增加,对虾的成活率也增高,增重倍数也提高。这就表明,维生素(在试验范围内)有降低对虾死亡率、促进生长的作用。维生素促进生长的效应最敏感区间是0～0.54％,在此范围内,维生素的少量增加也能明显地提高其生长效果,而维生素在1.1～1.2％范围内,增重曲线就逐渐趋向平坦,表示2.1％的添加量接近维生素的最适添加量。 维生素还有降低饵料系数的作用,在试验范围内,随着维生素的增加,饵料系数也降低,最低可达2.48。

The purpose of this study is to investigate the effect of vitamin on the growth and survival of Penaeus chinensis O'sbeck. Mixed vitamins, at four levels (0,0.27, 0.54, 1.1, and 2.1% respectively), were used as a synthetical index after the long-term test in laboratory. The results show that there is an increase in survival and growth rate of shrimp Pena-eus chinensis O'sbeck along with the increase of vitamin within the test range. Thus, it pro-ves that vitamin within test range can affect shrimp as to promote its growth and decrease its mortality. The sensitive effect on the growth is particularly noticeable when the amount of vitamin is within the range of 0-0.54%, where a little increase of vitamin can distinctly promote the growth of the shrimp. However, when the amount of vitamin is within the range of 1.1-2.1%, the curve of increase body weight tends to be smooth gradually, suggesting that 2.1% of vitamin be close to its optimum amount.Vitamins also perform the function of lowering the diet coefficient. As vitamins amou-nts increase within the test range, the diet coefficient decreases. The lowest can reach down to 2.48.