Cultivation mode of Loach in rice field

Misgurnus anguillicaudatus is a widely distributed warm-water bottom small fish with a wide range of temperature and tolerance to hypoxia and omnivorous waiting points. The meat is tender and delicious, and it has high nutritional and medicinal value. The international market calls Loach fish ginseng in the water.

I. Technical essentials

1. The choice of fish culture rice field: fresh water quality, abundant water, convenient drainage and irrigation, solid ridge and no leakage, covering an area of 2mur10 mu, it is better to maintain a certain water level of low-lying rice field, clayey soil.

2. Build field engineering and anti-escape facilities: heighten and widen the ridge of the field, 50cm the ridge height, 50cm the bottom width, 40cm the top width, use plastic film or screen as anti-escape facilities on the ridge, the film or net is higher than the surface 20cm, and bury the underground 10cm. After ploughing the paddy field, the ring ditch of deep 30cm and wide 20cm was dug at the distance from the inner 50cm of the ridge, and the ring ditch was repaired after transplanting seedlings. The inlet and drain is made of barbed wire or nylon net.

3. Fertilization in paddy field: before transplanting, base fertilizer was re-applied, chicken and pig manure 250Kg was applied per mu to breed natural bait and promote the growth of Loach. After rice transplanting, the paddy field applied 25kg per mu of chicken and pig manure every 15 days until the middle of August.

4. Scientific application: the best time to apply pesticide is 5 days before transplanting or 7 days after transplanting. Weeding in fish and rice fields uses low-toxic and efficient pesticides, such as Caokexing and Nongshitai.

5. Loach stocking: the main source of Misgurnus anguillicaudatus seedlings is the acquisition of wild fish. The stocking specification is 5-20cm and the average mu is 15kg. In order to better grasp the most low-lying stocking specifications of Loach, increase the yield and increase the economic benefit, we did a comparative experiment of stocking Loach with 5-8cm and 15-20cm.

6. Feeding management:

(1) Water quality management: keep the water quality in the field fresh and add fresh water at the right time. After seedling stocking, the depth of paddy water should be kept above 5cm, and in the middle of culture (about mid-July), when it is the high temperature season, the depth of paddy water should be kept above 10cm. During the culture period, the water will be changed every 5 days. In the daily inspection, if you find the Loach floating head, frightened or still not sinking after sunrise, you should change the water immediately.

(2) Feed management: in order to achieve high yield, Misgurnus anguillicaudatus should be fed every day in addition to basal fertilizer and topdressing. The initial bait is 1.5% of the fish's body weight, the medium-term feeding is 3% of the fish's body weight, and the late feeding is 35% of the fish's body weight. Mainly feed plant bait, such as wheat bran, rice bran and so on. Bait is usually carried out in the evening, a full shot. The amount of bait should be reduced in cloudy days and low pressure weather.

(3) daily management: keep patrolling the fields frequently to check whether the facilities are damaged, especially on rainy days, such as intake, drainage holes and dams.

II. Summary

1. The best stocking specification of Loach was found out.

The purpose of stocking 5-8cm Misgurnus anguillicaudatus and 15-20cm Misgurnus anguillicaudatus is to gain weight. The results showed that the harvest effect of Misgurnus anguillicaudatus with 5-8cm was better, and it basically reached the standard of adult Loach.

2. Loach recapture technique.

(1) the capture should be carried out earlier, and the large one should be kept small. We began to catch large size Loach in the basket at the beginning of August, this is because: ① large size Loach has strong feeding ability and is easy to be confused by bait and drill the basket; ② Loach grows to a certain period of time and its weight gain slows down; ③ improves the living environment of Loach in rice fields and helps to increase the growth rate of small fish.

(2) tortoise bait. When catching Loach in the fish basket, in the early stage of fishing, put the bait of Loach in the fish basket, such as wheat bran, bran, potatoes, animal offal and so on. In the middle and later stage of fishing, the quality of the bait was continuously improved to make it more suitable for the taste of Loach. We use the methods of adding sesame oil to the bait, mixing leek with roasted red earthworm or sunflower cake, fried wheat bran, rice bran and so on.

(3) the lowest water temperature for fishing. The temperature is often measured before harvesting. Through two years of practice, we think that the collecting temperature of Misgurnus anguillicaudatus in the north should be above 15 ℃, rather than about 10 ℃ as recognized by some technical data.

Through the implementation of the above several recapture techniques, a good capture effect has been achieved, and the recapture rate is more than 70%.

3. Anti-escape technology of Loach.

The anti-escape method of "step" was summarized and tested in the process of culture, and the effect was very good. Is to build another step on the inner edge of the ridge. Wide 20cm, lower 15cm than the ridge of the field, Loach jump to the steps, it is difficult to jump up the ridge of the field, so as to achieve the purpose of escape prevention.