This article introduces the freshwater fish culture methods, culture conditions and preparations before stocking.
One, according to the requirements of aquaculture fish on the water temperature warm water fish culture, the general water temperature of 15-30 ℃, such as carp, grass carp, silver carp, bighead carp, crucian carp and group head bream, etc..
Cold water freshwater fish culture: the general temperature is 10-20 ℃, such as rainbow trout, fine scaled fish.
Hot water fish culture: the general temperature of 18-30 ℃, such as tilapia, freshwater pomfret, etc..
Second, freshwater fish culture according to the culture of water conditions, fish species and specifications, types of waters and culture measures, freshwater fish culture is divided into the following ways:
1) static water fish farming and fish farming in running water.
②Monoculture, mixed culture and aquaculture.
3 pond fish farming, rice paddy fish farming, river fish farming, lake fish farming, reservoir fish farming, net box fish farming, seine and fence fish farming and factory fish farming.
④Fine culture, semi-fine culture, rough culture and so on.
Third, the conditions of freshwater fish culture requirements pond fish farming is used in most areas of China's fish farming, the current production of freshwater fish farming accounted for more than 60%, with a small investment, large gains, quick results, stable production and other characteristics.
Area: Generally, the area of adult fish pond is 5-10 mu, which is easy to manage.
Parental fish pools, fish fry pools, fish seed pools to 3-5 acres is appropriate.
Depth of water: Generally, the depth of water in the adult fish pond is 2-3 meters.
The wintering pool in the north is 1.5-2 meters below the thickest ice in the cold.
Fish fry pool, hatchery pool depth of 1.0-1.5 meters is appropriate.
Species pools generally require a depth of 1.5-2.0 meters.
Water quality: abundant water, good water quality is a fundamental condition for fish farming.
Substrate requirements: pond substrate is best loam, sandy loam, followed by clay.
Four, freshwater fish stocking before the preparatory work 1, resting pond.
Clear the bottom of the pond weeds, impurities, leveling the pond.
2, clean and sterilize the pond.
The local method of clearing the pond: that is, draining the water in winter, through the bottom of the pond freezing, drying and bursting to remove the enemy, improve the substrate.
Drugs to clear the pond: lime or bleach can be used.
3. Water injection and cultivation of water quality.
After the pond disinfection, when the drug toxicity disappears, you can live in new water, 7-10 days before the stocking of fish, both casting base fertilizer, cultivate water quality.