鲤鱼配合饲料中添加无机盐效果的研究

STUDIES OF EFFECT OF ADDING INORGANIC SALTS TO THE MIXED FEED ONGROWTH OF COMMON CARP

为查明在鲤鱼配合饲料中添加无机盐的实际效果，在水库网箱中进行了饲料中添加不同无机盐对鲤生长影响的试验研究。结果表明：饲料中添加磷有稳定的积极作用，为必须添加的营养元素；而实验中添加的锌、镁和铜等成分则有负作用，故额外添加和水中含量较高会对鲤鱼生长产生抑制作用。另外，还发现多种元素混合使用时，有相互拮抗作用，减少了磷的正作用及锌、铜的负作用。据此认为，在鲤鱼配合饲料中添加混合无机盐定型产品不一定能达到预期效果。

The experimental studies to evaluate the function of adding inorganic salts in feed were carried out in cages in reservoir. The results show that phosphorus was an essential element which played a stable and positive role and must be added to the mixed feed of common carp. On the other hand, the components (zinc, copper, magnesium) added to the feed, played a negative role, i.e., the growth of carp was restrained if their concentrations were high in waters. Besides, the resistive interaction of various elements was discovered when they were mixed and applied to the feed; it reduced the positive effect of phosphorus and the negative effect of zinc and copper. ln view of this, the authors thought that desired results might not be achieved by enriching mixed feed of carp with patterned products made from inorganic salt compounds, and the formula of inorganic salt additives should be considered in combination with the composition of mixed feed.