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(一) 肥水养鱼的溶氧问题 静肥水养鱼在我国相当普遍。肥水渔塘一般指肥量足,浮游植物、动物粪便和动植物体等也较多的渔塘。为了提高产量,渔塘中还要投放大量的人工饲料和增加对渔塘的施肥数量,这造成大量氧的消耗导致溶氧不足,抑制了水中好气性细菌的繁殖和它对有机物的氧化分解。 在池底的淤积物中这种情况尤其突出,最终导致大量有机物被厌气性细菌分解,形成对鱼类有害的中间产物,如硫化氢、甲烷、氨、有机酸以及过多的二氧
(A) the problem of dissolved oxygen of fertilizer water fish Static Feishui fish is quite common in our country. Fertilizer and water fishing pond generally refers to the foot fat, phytoplankton, animal waste and animal and plant objects are also more fishing ponds. In order to increase production, a large amount of artificial feed is also put into the ponds to increase the amount of fertilizers applied to the ponds. This results in a large amount of oxygen depletion resulting in insufficient dissolved oxygen, inhibiting the breeding of aerobic bacteria in water and its oxidative decomposition of organic matter. This is especially true in sediments at the bottom of the pond, which eventually leads to the breakdown of large amounts of organic matter by anaerobic bacteria, creating intermediate products that are detrimental to fish such as hydrogen sulfide, methane, ammonia, organic acids and excess dioxins