Put 300 grass carp species with specification of 200-250g/tail per mu

Conventional aquaculture of grass carp is based on mixed culture, and it takes 3 years to be raised, with high cost and long capital occupation time. Harmless grass carp high-yield and high-efficiency rapid culture technology, is introduced as follows.

1, pond requirements: pond area of 10-20 acres is appropriate, the water depth of 2-2.5 meters, the thickness of silt does not exceed 20 cm. Every 10 acres of pond supporting power of 3 kilowatts of oxygenator and automatic baiting machine each 1.

2, pond clearing: winter draining pond water, freezing more than 20 days. Fifteen days before the stocking of fish, into the water 10-20 cm, per mu with lime 150 kg pond disinfection.

3, fish stocking: before and after the Spring Festival, each mu put specifications for 200-250 grams / tail of grass carp species 300, specifications for 15-20 tails / kg of crucian carp species 300, specifications for 5-6 tails / kg of silver carp species 50, bighead carp species 10. The fish species were sterilized by soaking in 5% salt water for 5-10 minutes before stocking.

4, feed feeding: feeding pellet feed, feed protein content of 28-32%, supplemented by green feed. Feed feeding follow the "before the coarse after the fine" and "four fixed four see" principle, generally feeding 2 times a day, in order to eat within 2 hours, the grass carp ingested 8 into full as appropriate. 3-6 months to feed the protein content of 28% of the pellet feed is based on the daily feeding rate of 3%, moderate feeding of green fodder; the amount of protein content of 28% of the pellet feed is based on the daily feeding rate of 3%. Adequate feeding of green fodder; July-September, control the feeding amount of pellet feed, daily feeding rate of about 1.5%, pellet feed protein content of 28%, increase the amount of green fodder feeding, control fish disease; October-November feeding protein content of 32% of the pellet feed. After feeding pellet feed continuously for a period of time, you should stop feeding pellet feed for 1 week, and feed the original grain feed during the interval. Usually pay attention to add vitamins and other drugs in the feed to avoid the grass carp suffering from liver and gallbladder syndrome and other diseases that cause a large number of deaths.

5, water quality management: the correct use of oxygenator, June-October sunny days without wind weather, every day 1-3 p.m. to open the oxygen for 2 hours, the morning of the appropriate time to increase the oxygen; continuous cloudy days should be early to increase the oxygen. Fill the pond with new water at the right time, take the "small rows of small into, many water changes" approach to gradually regulate the water quality. 6-9 months, every 3-5 days to fill the new water once, each time to add about 10 cm of water, every 15-20 days every mu of water surface 1 m depth with lime 10-20 kg slurry sprinkled throughout the pond once.

6, disease prevention and control: the use of "before the coarse after the fine, fine green combination" way of feeding, control of grass carp liver and gallbladder syndrome. The common diseases of grass carp are erythroderma, gill rot disease, enteritis disease, generally take the combination of internal and external treatment, external splash mainly bleach, chlorine dioxide and other disinfectants, for 3 days; internal to "three yellow powder" bait is more effective, per 50 kg of fish body weight with the three yellow powder (50% rhubarb, 30% cypress, 20% Scutellaria baicalensis,). (crushed into powder and stirred) 0.3 kilograms mixed with flour paste and mixed into the feed feeding, used for 3-5 days.

7, timely fishing: timely large-size adult fish fishing market is an important measure of high-yield grass carp farming, the main purpose is to reduce the amount of fish in the pond water body, to promote the rapid growth of late pond fish. Generally at the end of July, 1 arrest, in the early morning when the water temperature is lower arrest.