After the temperature drops, how to raise grass carp with high yield and efficiency? What are the key points?

Grass carp is the most frequently mentioned species in the freshwater fish farming industry, with the largest number of people and the widest range of farming. Now, as the temperature drops, grass carp of different sizes are slowly ushering in the peak period of fish production and fry release. Replenishing seedlings is a common breeding operation in high-yielding and efficient grass carp ponds. Each user will promptly replenish fish species of corresponding specifications and quantities after harvesting according to his or her actual breeding plan. Within 2-3 days after seeding, some ponds can resume feeding and the amount of feeding can be increased quickly; however, in some ponds, the amount of feeding cannot be increased for a long time after seeding (especially in winter). If you increase feeding for 2-3 days, a large number of dead fish will appear; if you control the feeding for 1-2 days, the phenomenon of dead fish can be alleviated. However, the phenomenon of dead fish is difficult to cure and cannot be fed normally. As a result, some ponds can sell fish in time, while some ponds cannot maintain normal feeding and continue to delay the time of selling fish. Therefore, safe seeding is a key measure for normal feeding in the later period to achieve high yield and efficiency. 1. Choosing high-quality and healthy seedlings is the prerequisite for placing good seedlings

During the peak breeding period, fish species eat more vigorously. If the judgment is not accurate, there are often problems with overfeeding and digestion. Most of the pigs and immune organs are not well developed and their ability to resist stress is poor, resulting in poor physical fitness, many diseases, and insufficient feeding after winter. Selecting high-quality grass carp species can be based on the following aspects:

① The back muscles of the fish are thicker and stronger, the body is slender, and the body color is grass green;

②? There are no parasites, congestion or ulcers on the body surface, gills and intestines of the fish;

③ There is little fat deposition in the body cavity, the liver and pancreas are bright red, and the intestines of unnetted fish species are full of food or half Full;

④ When collecting the net, it has strong water holding capacity and good vitality;

In addition to the fish body, the management records of the breeding process can help us understand the health status of the fish species. , can be judged through breeding logs. Judging from the breeding results of benchmark demonstration households, the seedling ponds insist on changing the water level 3-4 times a month, and take it orally for 8-10 days. In the later stages of adult fish breeding, they will be ready within 2 days after being put into the pond. They can eat normally, and within one month, the survival rate of the fish species is over 95%. 2. Establish water before releasing seedlings to reduce swimming in the pond and promote faster opening

After the fish are sold in adult fish ponds, the bottom of the pond is turned over. In addition, bottom flooding is frequent in winter, so seedlings are released without treatment. , fish species are very susceptible to infection and bacterial diseases. Experienced users will kill and disinfect the water body before releasing the seedlings. However, after the insecticide and disinfection, the water body often becomes thinner and the fish species swim in the pond. Therefore, before releasing seedlings, farmers with excellent technology will pre-treat the fish ponds to avoid fish swimming in the pond and disease after being released into the pond.

Pre-treatment of the pond before the seedlings are released: One week before the seedlings are released, the water body will be disinfected and disinfected. At the same time, water adjustment and algae cultivation will be carried out 2-3 days before the seedlings are released. Taming and feeding can be carried out on the same day or the next day. 3. After the seedlings are planted in the pond, it is crucial to strengthen the physical fitness of the fish

After the fish have been transported over long distances, the fish body will be in a strong stress state, especially if the seedlings are released after injection, it will have a negative impact on the fish body. The damage is more serious. Therefore, in addition to good water quality treatment before releasing the seedlings, within one week after releasing the seedlings in cold weather, the feeding rate needs to be controlled to not exceed 1%. At the same time, take Wuhuang Essence + Allicin orally for one week. Then gradually increase feeding.

In short, for high-yielding and efficient grass carp farming, fish fingerling stocking treatment is very critical. It is necessary to grasp the fundamentals from the source of fish fingerling quality selection. At the same time, strengthen the pre-treatment before and after fish fingerling stocking, especially after the fry are released. Do not feed too quickly within a week, gradually restore the fish's physique, and then gradually increase the amount of feeding to reduce disease problems in later breeding.