It can improve the immunity function comprehensively, and the performance is remarkably obvious when the animals are attacked by virosis.

全面促进免疫功能的提高，尤其是当动物受到病毒性疾病侵袭时，效果尤其明显。

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There is a close relationship between COD and shrimp viral disease. COD is one of the important environmental conditions for breaking out shrimp epidemic virosis.

通过对虾池内主要环境因子与对虾病毒病相关关系的研究，发现虾池内化学需氧量（COD）太高是诱发对虾病毒病暴发流行的主要环境因子之一。

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