2. Healthy shrimps have the same flesh color, no deformity, light red or deformity, which means unhealthy. In addition, the salinity, temperature and pH value of the shrimp pond should be consistent with that of the shrimp pond as far as possible. Therefore, it is necessary to adjust and adapt in advance in the shrimp temple. Because the PH value increases with the amount of fertilizer, fat meat does not advocate that the pH value of shrimp pond is too different from that of shrimp pond, so fertilizer should be released. After adding saplings, the water quality in the shrimp pond temporarily became fertilizer. With the increase of pH value, shrimp seedlings gradually have an adaptation process, and the growth of shrimp is not threatened. Second, we should grasp the understanding and treatment of hypoxia. Generally speaking, everyone knows that shrimp is in a hurry to lack oxygen.
However, it is easy to be overlooked that the condition of poor complexion and insufficient oxygen has not yet reached the dock. In fact, most shrimp diseases are caused by long-term hypoxemia, so only by understanding hypoxemia and dealing with hypoxemia can we grasp the train of thought. Because the lack of laughing gas will affect the search, we can control the treatment by observing the search. For example, looking for darkness, blackening, stinking, looking for layers, turbidity, and lack of oxygen in the feed belt and rope (submerged part) indicate that the quality is poor, harmful substances are increasing, and the shrimp is in a state of stress or struggle. Therefore, in addition to increasing oxygen in time, comprehensive measures such as reducing fat, detoxifying, resisting stress and increasing nutrition are needed to deal with hypoxia.
It is said that hypoxia eventually leads to problems in the water environment, and there are many reasons for hypoxia. For example, cleaning the pond or the bottom of the pond, excessive shrimp density, large accumulation of residual bait and dead algae, inflexible measures to increase oxygen production at night, and large number of rotifers. Therefore, prevention work must start from the source. In addition, accurate wages should be paid at ordinary times, excessive tides should be controlled in time, and production should be increased dynamically at night. If there are too many rotifers, it is necessary to reduce or stop feeding 1-2 days, especially to determine the density of preventive seedlings according to the conditions and management level of shrimp ponds. On the premise of mastering or controlling the water environment, it is necessary to decide the maximum number of seedlings to be thrown.
Prevention and treatment of shrimp disease, it is difficult to treat severe shrimp disease in the early stage, but mild shrimp disease can be completely treated. In the past, our method was to treat shrimp that was sick during sleep. Nine times out of ten, this method is incurable. Because by this time, the shrimp disease is already very serious, and it is too late. The method is to push forward the prevention work. To sum up, as long as we master these three aspects, that is, shrimp selection and seedling throwing, grasp the water environment from the source, and carry out comprehensive management based on early detection and early treatment to prevent shrimp diseases. Then it will be easy or easy to raise shrimp.