Culture technique of Loach in Paddy Field

Advantages of raising Loach in Paddy Field

The main results are as follows: 1. Without destroying the original ecosystem of paddy field and without increasing the use of water resources, the effect of dual use of water and double harvest of one land can be achieved, and the economic benefit can be directly improved.

2. The ecological effect is more prominent, which mainly shows that Loach can directly eat some harmful insects in the water, play part of the function of biological pest control, save pesticides and reduce food pollution.

Misgurnus anguillicaudatus likes to inhabit the surface of the putrid soil at the bottom, and can breathe through the skin and intestines in addition to Gill breathing. Misgurnus anguillicaudatus is an omnivorous fish that likes to feed at night. It feeds on insects, small crustaceans, tender leaves of aquatic plants, diatoms, cyanobacteria, green algae, xanthophytes and zooplankton.

Under the condition of artificial feeding, plankton bait is cultivated by fertilization, and the residual bait and dung at the bottom of the pond can also be used as food. Artificial feeding can also feed commercial feed, such as peanut cake, rice bran, wheat bran, bean cake, silkworm pupa powder, snails, earthworms, water worms, fish, poultry and livestock viscera and so on. Misgurnus anguillicaudatus is small, light and gluttonous. When it is too full, it is easy to cause indigestion, affect normal breathing and cause bloating to death.

Misgurnus anguillicaudatus is a warm water fish, which is yellowish in the paddy field. its growth water temperature is 15-34 degrees, and the optimum growth water temperature is 24-30 degrees. When the water temperature drops below 5-6 degrees or higher than 35-36 degrees, it will dive into the 10-30 cm mud layer to sleep.

Rice field construction

When raising Loach in rice fields, we should choose rice fields with sufficient water source and good water quality, covering an area of 2-10 mu, and build an 80 cm high anti-escape wall around the rice fields with cement or plastic sheets, thin films, screen windows, etc. (30 cm into the mud). Build a 20 cm wide step along the ridge, 15 cm away from the top of the ridge. A zigzag ditch is dug around and in the center of the field, which is 50 cm wide and deep. Each of the inlet, drain and overflow pipes are intercepted with fine barbed wire, and the drainage pipes are usually sealed with cement.

Loach species stocking

Loach fish is best from the original Loach farm or from the natural waters, requiring a strong physique, disease-free and injury-free, 2-year-old, female weight 15-25g, male weight more than 12g. Before irrigation in the paddy field in late February, 75-100 kg of quicklime per mu was evenly sprinkled for cleaning and disinfection. 1000 kilograms of fermented pig manure is applied per mu, and the water is filtered into the field. The water depth in the ditch is 30-40 cm, and the transparency of the water is about 25 cm. After the seedlings turn green, put 2-25000 loach seedlings of 3-5 grams per tail per mu, soak them in 3% salt solution for 10 minutes before stocking, and enter the field after disinfection.

Feeding and management

1. Fertilization

In the process of culture, in order to ensure the continuity of plankton, organic fertilizer must be applied timely, a small amount and evenly. Fertilize every 10-15 days, using 150 kg fertilizer per mu each time. In addition, according to the specific situation of the water color, about 1.5 kg of urea or 2.5 kg of ammonia bicarbonate is applied each time to keep the water yellowish green.

2. Bait

Because of the high density of Loach in the field, artificial feed should be fed, such as bean cake, silkworm pupa powder, fly maggot, earthworm, snail, clam, slaughterhouse scraps, rice bran, bean dregs, rapeseed cake, wheat bran and so on. The peak growing season of Loach is from July to August. The proportion of silkworm pupa powder up to 15%, meat and bone powder 10%, bean cake 25%, bait twice a day is required, and the feeding rate is 10%. From September to October, it is mainly plant feed such as wheat bran and rice bran, which is usually fed once a day in the morning and in the afternoon, and the feeding amount is 2% of the total weight of Loach. 4%. About 2% in early spring and late autumn. According to the feeding situation of Loach, it is generally appropriate to finish eating within 1-2 hours after each feeding.

3. Water level control

Water level control is extremely important. The actual water level above the field surface is generally controlled above 5 cm. Add new water at the right time, generally once every half a month, and the water level should be properly deepened in the summer high temperature season.

4. Disease prevention and treatment

As Misgurnus anguillicaudatus is suitable for paddy field culture, there is generally no disease in the process of culture. In order to prevent the occurrence of red skin disease, 10-20 grams of furanone bait and 50 kilograms of feed were fed for 2-3 days every month, and 10-15 kilograms of quicklime per mu per month were sprinkled in the whole pool. The time of applying pesticide to rice is generally 3-5 days before transplanting or 5-7 days after transplanting.

5. Daily management

Patrol the fields twice a day to check the escape prevention facilities, especially on rainy days to check the loopholes carefully. Prevent the invasion of natural enemies (such as water snakes, ducks, etc.) and observe the activity and feeding of Loach. Water containing highly toxic pesticides such as methamidophos, toxicol, carbofuran and pentachlorophenol sodium is strictly prohibited.

Fishing method

First, flushing fishing, near the nozzle, spread the net, release water from the inlet, because Loach has the characteristics of water, after a certain period of time, the net will be picked up and captured. This method is suitable for the water temperature of about 20 degrees and Loach love activities; the second is bait trapping, putting the fried bran or wheat bran in the bamboo cage and placing the cage in the ditch to lure the Loach into the cage; the third is to catch the dry field and slowly release the water from the field, so that the Loach is concentrated in the exposed place of the ditch soil to catch.