用河蚌培育珍珠,往往需从外地大量购进河蚌。这些购进的河蚌,如果运输和暂养不得法,就易出现中毒现象,造成以后逐渐衰弱、染病而死亡。 河蚌运输和暂养易中毒的原因分别是:河蚌在运输途中,蚌壳会紧闭,只能依靠其外套腔中所含的水分维持生命。如果运输的时间过长,运到以后,蚌壳内的代谢废物浓度增 Cultivation of pearls with mussel, often need to buy large quantities of mussel from the field. These purchased mussels are prone to poisoning if they are illegally transported and held temporarily, resulting in the gradual weakening of their health and the death of their illness. The reason why mussels are easy to transport and suspense is that mussel clam will be closed tightly during transport, and it can only rely on the water contained in its coat to maintain its life. If transported for an extended period of time, the concentration of metabolic waste in the shell increases after shipment