I. Scope

Suitable for pond culture of silver carp and bighead carp.

2. Choice of pond

The area of bighead carp fry culture pond is115115hm2, and the pond depth is about1.5m.: The bottom of the pool is flat, with proper silt and no overgrown weeds; The fish pond is sunny and sunny. And it must be cleaned before stocking.

Three. Water quality index

Implement the Fishery Water Quality Standard GB 1607- 1989, with pH value of 6.5-8.5, dissolved oxygen ≥4mg/L, ammonia nitrogen < 0.025 mg/L, biochemical oxygen demand < 5 mg/L, others: comply with GB1607.

4. Breeding of parent fish

Before stocking parent fish, base fertilizer should be applied, and after stocking, topdressing should be carried out according to the season and specific measures in the pond.

5. Feeding technology and feeding quantity

Artificial feed is supplemented during the fingerling cultivation period, and peanut bran or rice bran is added every day for every ten thousand fingerlings before winter, about1kg; After the weather turns cold, fertilization can be reduced, but the amount of peanut bran and rice bran needs to be slightly increased to make fish accumulate fat for the winter.

The use of intransitive verb fertilizer

The earliest fertilizer used in fishery is original organic fertilizer, such as manure and compost, and later inorganic fertilizer-chemical fertilizer is used. Although the original organic fertilizer has comprehensive nutrition, its effective components are too low and its fertilizer efficiency is slow, which limits the fish yield. Although inorganic fertilizer has high content of effective components, its fertilizer efficiency is short and its components are single. Small green algae and cyanobacteria are mainly cultivated, which is beneficial to the growth of silver carp, but the effect on bighead carp culture is not ideal. Modern bio-organic fertilizer for fishing is made by decomposing traditional organic fertilizer with modern biotechnology and adding inorganic fertilizer appropriately. It not only contains a large number of macro elements such as nitrogen, phosphorus and carbon, but also contains balanced trace elements, various organic substances, peptides, beneficial bacteria, fertilizer efficiency enhancers, etc. It not only has rich and comprehensive nutrition, but also can fertilize, improve and control water, providing a good living environment for fish.

Transportation technology of intransitive verbs

1. Requirements: fresh water, high oxygen content, healthy fish, suitable density and easy operation.

2. Mode: vehicles such as cars, boats and planes use containers such as wooden barrels, canvas and nylon bags.