Grass carp main culture:
1: the main grass carp pond silt is not more than 20 centimeters, the water supply should be sufficient, the water quality is good, the depth of the pond should be maintained at 2 m. 30-50 acres of the pond must be a set of 2.2 kilowatts of oxygenation equipment.
2: Grass carp must be neat specifications, physical health, specifications in the 100 grams / tail or so, other varieties with specifications, especially carp shall not be greater than grass carp.
3: the placement of grass carp: the main pond of grass carp, grass carp should be placed in the total amount of 60% or so. The condition of the good pond per 667 square meters can be put grass carp 800-1000, with silver carp 500, bighead carp 100, carp 120 (put the carp can not be put crucian carp) such as put crucian carp for 300-400 tails.
Breeding: put grass and all kinds of water plants, such as: bitter grass, alfalfa, Sudan grass, rye grass and other high-quality high-yield green fodder. In addition, a variety of weeds and vegetables, beans, melons, stems and leaves of corn are very good feed for grass carp. The amount of feed should be flexibly controlled according to the weather, eating condition of fish and water quality, and it is better to finish the feed before the evening of each day. In the summer high temperature season, the grass carp should be strictly prevented from eating night grass. In addition, at 4 p.m. every day, 1.5% of the weight of the pond fish should be fed granular bait to supplement nutrition and tame the concentration of eating.
Water quality regulation (very important)
We should always keep the water quality fresh and hygienic, if possible, every interval of 3-5 days to add new water 5-10 centimeters, such as the absence of water conditions, must be used every day to aerate the oxygenation of the oxygenation of the oxygenated tubes in order to increase the mobility of the water and the oxygen content of the water, generally using underwater aeration oxygenation tubes with the underwater aeration oxygenation discs, the effect is better, the 30-50 acres of ponds. 30-50 acres of ponds using a set of aeration and oxygenation equipment can be (Jiangyin Pangda Rubber & Plastic Co., Ltd. production) to stimulate the rapid growth of grass carp. Equipped with underwater aeration and oxygenation, can keep the water quality fresh, dissolved oxygen normal. At the same time, every 15 days 667 square meters plucking and spreading quicklime about 10-20 grams to clarify the water quality, transparency is best to maintain at about 25-30 cm.
The types of fish diseases that can be prevented are: bacterial enteritis, gill rot, erythroderma and other three major diseases of grass carp. (The following are the daily elements of the prevention of fish disease)
One: thoroughly clear the pond: before stocking ponds must be used lime at 667 square meters dosage of 80 kg.
Two: fish disinfection: before stocking with 3% -4% of the salt water liquid immersion of fish for 15 minutes, can also be used 10 ml / kg of bleach 8 ml / kg of copper sulfate and other disinfection.
Three: feed disinfection: June to September, every 15 days on the food court for disinfection, the method is in the fish after eating with 500 grams of bleach dissolved in water and plucked and scattered around the food court, can also be used to hang the bag and hang the basket type way.
Four: Limit the amount of food: Grass carp are gluttonous, as long as the environment is suitable, the appetite is basically unrestrained, in the high temperature season, especially to limit the amount of grass carp to eat, generally fed to eighty percent of the saturation can be, can not let the grass carp to eat the night food, every day, to insist on the remnants of the material to be fished out.
Five: water disinfection: May-September, every interval of 15 days must be disinfected. Commonly used drugs and their dosage: bleach 1 mg / kg, copper sulfate ferrous sulfate 0.7 mg / kg, trichlorfon 0.5 mg / kg, quicklime 20 mg / kg, the above types of drugs used alternately, the effect is good. Bait feeding can be done once every 15 days. Each time 3 days, every 100 kg of feed with 100 grams of hygromycin, but also available sulfonamides, furans and other drugs made into bait feeding.