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1 水产养殖用药现状1.1 养殖方式的发展增加了对渔药的需求 水产养殖走过了从粗养到人工精养的过程。目前,精养模式较多,如南方的高位池养殖,北方的大棚养殖,工厂化集约化程度较高。精养状况下,放养密度较大,如南方南美白对虾放养密度达到20万～30万尾/亩,在这样高的密度下,粪便残饵聚集池底,极易造成水体恶化,从而滋生
1 Status quo of aquaculture medicines 1.1 The development of modes of cultivation has increased the demand for fishery drugs Aquaculture has gone through a process ranging from intensive care to artificial intensive care. At present, there are more intensive modes of cultivation, such as high pooling in the south and greenhouse cultivation in the north, with a higher degree of factory intensiveness. Under intensive conditions, the stocking density is relatively large. For example, the stocking density of white shrimp in South American shrimp reaches 200,000 to 300,000 / mu. At such a high density, fecal bait accumulates at the bottom of the pond, which can easily lead to the deterioration of the water body, thus breeding