当前由于饲料、燃油价格不断上涨,水产养殖病害加重,用药量加大,造成淡水养殖成本提高,而水产品价格却不断下降,尤其是有些地方放养品种单一,产量集中,造成水产品滞销。另外,由于“氯霉素事件”的发生而导 At present, due to rising feed and fuel prices, aggravating diseases of aquaculture and increasing dosage, the cost of freshwater aquaculture has been raised while the prices of aquatic products have been declining. In particular, in some places, there is only one single stocking stock and the output is concentrated, which causes the slow-moving aquatic products. In addition, due to the occurrence of “chloramphenicol incident”