Five points for attention in autumn temperature and water temperature suitable for breeding and autumn propagation of fish fry

The air temperature and water temperature in autumn are more suitable for breeding and breeding, but the fry in autumn must take care of the five levels.

Breeding fish fry

Thoroughly clear the pond: remove frogs, snakes, fish, shrimp, insects, bacteria and other enemy pests in the pond. The method is to drain the pond water and sprinkle it with 60,80kg quicklime or 4kg bleach per mu of fish pond.

Scientific fertilization: timely and appropriate fertilization to provide rich and palatable bait for autumn fish fry. Six days before the fry went into the pond, 60cm new water was injected. Two days later, 300,400kg organic fertilizer per mu was applied, and then moderate topdressing was applied to keep the transparency of the pond water at 30~35cm.

Reasonable sparse: sparse can provide a good ecological environment for fish fry and accelerate its growth. Generally speaking, direct breeding can be made by releasing seedlings at one time, with 1.2 ~ 15000 seedlings per mu. According to the situation of autumn seedlings, the proportion of each species can be properly controlled. Generally, there are 0.7 ~ 8000 silver carp, 0.2 ~ 3000 bighead carp and 0.3 ~ 4000 grass carp per mu.

Scientific feeding: from fry to fry, the eating habits change greatly, and the bait should be in the right amount. From the seedling pond to the 15th day, at the same time of fertilizing and watering, 1.5 kilograms of soybean milk should be sprinkled in the whole pond per mu, twice a day. After 5 days, feed concentrate such as cake and bran noodles twice a day, 2kg per mu. And began to feed green fodder, generally long fish fry more than 3cm can be fed to duckweed, 10-20 kg per mu per day; when exceeding 7cm, 20-40 kg each time. When the fry grows above 8cm, it can be fed with aquatic grass and dry grass instead. In the case that there is no duckweed to fish, it can also be beaten with water upland grass instead. This method can be used to cultivate large size fish species.

Regular water injection: general fish fry begin to add water 3-4 days after entering the pond, every 4-5 days, add water every time, 10 minutes, 20 cm, 20 days, every 7 days, about 10cm. When adding water, we should prevent the enemy from invading. The weeds and dirt in the pool should be removed frequently, and the bait table and food farm should be disinfected with quicklime or bleach once every ten days.