Tender, delicate and delicious meat-- High-yield culture technique of Loach

Loach culture

Misgurnus anguillicaudatus is tender, nutritious, light and delicious, and has the function of nourishing medicine, so it has always been loved by people. Liu Dengquan, a demonstration household of science and technology in Houtan breeding farm of Tangdian, carried out an experiment on high-yield culture of Loach pond with an area of 5 × 667m. after culture from April to May, the yield per mu was 1820kg, the sales income was 32760 yuan, and the net profit per mu was 10060 yuan. The effect is remarkable, and the main technologies are introduced as follows:

I. Culture conditions

Misgurnus anguillicaudatus pond culture requires adequate water source, fresh water quality without pollution, convenient injection and drainage, neutral or slightly alkaline loam soil, convenient transportation to ensure electricity consumption.

The pond is rectangular in east-west direction, with a ratio of length to width of 2:1 and an area of 5 × 667mm. The depth of the pool is 0.8-1m and the water depth is 0.4-0.6m. The soil of the pond wall should be compacted and surrounded by a net around the pond, the lower end is buried in the soil 10cm, and the upper end is above the water surface 20cm, in order to prevent Loach escape and enemy organisms to enter.

Second, stocking mode

1. Prepare before stocking

The pond was cleaned, reformed and disinfected 20 days before stocking Loach seedlings. Use barbed wire at inlets and drains to prevent escape. A fish sliver with a depth of 30-50cm is excavated at the outlet, which accounts for an area of about 1x3Muth1max, and a layer of decaying clay is laid on the bottom of the pond. The pond was cleared with quicklime 7 days before stocking, and every 667m of pond water depth 10cm was sprinkled with 75% quicklime pulping throughout the pond. Five days after clearing the pond, the water was injected with 25cm, and 150 tons of organic fertilizer was applied every 667m to improve the water quality.

2. Seedling stocking

Misgurnus anguillicaudatus seedlings choose artificial culture or wild seedlings, but all should be neat, disease-free, agile, and fully released at one time. The seedling release time is generally in April every year, the average water temperature is more than 15 ℃, and the seedling size is 80 per mu and 1100 eggs per mu, which is best to be carried out in sunny afternoon. The seedlings were washed and disinfected with 8-10mg/L bleach solution before stocking, and the washing and disinfection time was 20-30min.

III. Feeding and management

1. Feed feeding

Misgurnus anguillicaudatus is an omnivorous fish. in addition to fertilizing and cultivating natural bait, Misgurnus anguillicaudatus should also be fed with fish meal, fish milk, silkworm pupa, animal scraps, as well as plant bait such as wheat bran, rice bran, bean cake, melon and vegetable leaves. The above feed can also be used as raw material to make compound feed for feeding.

The feeding habits of Misgurnus anguillicaudatus are closely related to water temperature. The water temperature is 16-20 ℃, mainly plant feed accounts for 60% Mel 70%; when the water temperature is 21 ℃ 23 ℃, the animal feed each accounts for 50%; and when the water temperature exceeds 24 ℃, the increase in animal feed is 60% Mel 70%. The specific amount of bait should be flexibly controlled with the water temperature, water quality and weather conditions. The total weight of Misgurnus anguillicaudatus was 1% Mur2% in March, and the total weight of Misgurnus anguillicaudatus was 3%, 6%, 6%, 6% and 7% of the total weight of Loach in July and August, and gradually decreased to 3% of the total weight of Loach in September. When the water temperature is higher than 30 ℃ or lower than 10 ℃, bait should be reduced or not. The water temperature is suitable for feeding the Loach once in the morning, in the evening and once in the evening, so that the Loach can have a small amount of food and twice a day when the water temperature is low. Bait should be "four fixed" and "four look".

2. Water quality control

Water quality requires "fat, live, tender and cool." The water color should be yellowish green and the transparency should be 20-30cm. When the transparency is greater than 30cm, the application of organic fertilizer 20 kg per time will increase the natural bait organisms of Loach such as radial rentals and cladocera in the pond, and when the transparency is less than 20cm, topdressing should be stopped or reduced. In the hot season, new water is often injected, part of the old water is replaced, and the aerator is turned on regularly.

3. Daily management

Persist in patrolling the pond in the morning, middle and evening every day, keep abreast of the water level, water quality and feeding of Loach at any time, and deal with problems in time. Usually weed the pond side frequently, use chlorine dioxide every 15 days in high temperature season, sprinkle quicklime in the whole pond every 7 days, and apply microbial preparation twice a month in the middle and later stages of culture. Often check anti-escape facilities, timely repair of loopholes, timely treatment of fish diseases, and make a good breeding diary.

IV. Benefit analysis

The commercial shrimp was harvested for 1820 yuan per 667m, the sales price was 18 yuan / jin, the sales income was 32760 yuan, and the cost per mu was 22700 yuan (including 11600 yuan for feed, 10800 yuan for seedling, 10800 yuan for electricity and 200 yuan for labor). The net profit per mu is 10060 yuan.

V. matters needing attention

1. In the aspect of seedling stocking, large size seedlings should be put in as far as possible. the survival rate of this kind of large size seedlings is high and the multiple of weight gain is high. more importantly, this kind of large size seedlings rarely suffer from rotifer disease, even if they are infected, the treatment is easy and the mortality rate is not high.

2. Misgurnus anguillicaudatus was raised in the pond. after the Loach pond was put into the pond, no bait was given within two days, and the Misgurnus anguillicaudatus seedlings were not bait until they adapted to the environment. At first, the powdered feed is sprinkled around the edge of the pool, and the feeding place is gradually fixed on the table.

3. Loach is easy to escape. It is necessary to always check whether the fish interception facilities are damaged and whether the ridge of the pond collapses, and take timely measures when finding the situation. In addition, attention should be paid to killing and driving away enemy creatures.