Mixed culture technique of lotus root Loach

Is it feasible for mixed culture of lotus root and Loach? The lotus root grows in the soil, and the Loach also survives in the soil. Raising Loach in the lotus root pond belongs to ecological culture and is mutually beneficial. How can lotus root Loach be raised together? The editor will lead you to understand.

Mixed culture technique of lotus root Loach

1. Prepare the lotus root field.

The lotus root field for the cultivation of Loach should not be too large in area, with sufficient water, convenient drainage and irrigation and fertile soil. Before releasing Loach, tamp the ridge of the field, widen and strengthen it, add an anti-escape net to the injection and drainage outlet, and make an anti-escape wall around the ridge with plastic sheet or screen, which is 30 cm high above the ridge surface and buried 20 cm underground. If you repair a step with a width of 20 cm on the inside of the ridge, which is 15 cm lower than that of the ridge, the anti-escape effect will be better.

two。 Loach stocking

The selection of seedlings should be of neat specifications and strong physique. When the release time is before and after Ching Ming Festival, when the lotus root grows 2 vertical leaves and the water temperature is stable above 20 degrees, fish can be released with 20, 000 Loach per mu. One week before Loach stocking, fermented chicken, pig, cow manure and other organic fertilizers were applied 150-200 kg per mu and calcium superphosphate 15-20 kg per mu to improve the water quality and at the same time add new water to make the water level reach 30 cm.

3. Feed.

Although there is natural bait of Loach in lotus root field, it must be fed artificially, otherwise the growth of Loach is slow and the benefit is poor. Misgurnus anguillicaudatus is omnivorous fish, animal and plant feed can be eaten. Animal feed such as small miscellaneous fish, earthworms, snail clam meat, insects and their larvae, silkworm pupa, fish meal, blood meal and so on, plant feed such as rice bran, wheat bran, bean cake, bean curd dregs, vegetables, melons and fruits are better feeds. The two kinds of feed can be fed in the shape of a ball according to a certain proportion. This is beneficial to the centralized feeding of Loach, and is also convenient for inspection and management.

4. Lotus root field management

Water quality control: with the continuous rise of summer temperature, without affecting the growth of lotus root, new water should be injected as soon as possible, sprinkling with 4 kg quicklime per mu to regulate water quality and disinfect and prevent disease.

Fishing harvest: the lotus root pond Loach was caught in early October. After many days in a row, the catch rate of Loach in the pond can reach more than 90%. After the Loach was caught, the lotus root was harvested, and the time was generally carried out at the end of October. This ecological cultivation model achieved both lotus root and Loach yield, and achieved higher economic and social benefits.

5. Reasonable topdressing

In addition to applying basic fertilizer, lotus root should also be reasonably fertilized during its growth period. Topdressing should not only meet the needs of lotus root growth and make the field water have a certain degree of fertility, but also not hurt Loach. Can apply rotten organic fertilizer or chemical fertilizer, the amount of topdressing should not be too large.

Disease control of Loach

1. Parasitic diseases: Misgurnus anguillicaudatus, which is attacked by rotifers, cups and third-generation worms, often floats on the surface and becomes restless. The control method is that the mixture of copper sulfate and ferrous sulfate (5:2) dissolves water and sprinkles evenly in the whole field, or Yuchongjing (deltamethrin solution) 0.15mg / kg 0.22mg / kg.

2. Printing disease: Misgurnus anguillicaudatus printing disease is caused by Aeromonas aerogenes infection, the focus is generally oval, round edema, and erythema, the affected area is mainly on both sides of the tail stalk, like a seal. The method of prevention and treatment is the same as red fin disease.

3. Water mildew: water mildew is not easy to be detected in the early stage. When it can be detected by the naked eye, the mycelium has invaded the wound of Loach and sent out the hyphae to form a cotton floc. Mold can secrete a large number of proteolytic enzymes, which can degrade the body tissue of Misgurnus anguillicaudatus and secrete a large amount of mucus, aggravate the disease, greatly reduce its appetite, weaken and die, often reproduce in spring, autumn or winter, and can be infected as long as there is skin trauma in fish.

4. Red fin disease: Misgurnus anguillicaudatus red fin disease is caused by Brevibacterium infection. Part of the epidermis near the dorsal fin falls off and is grayish white. In severe cases, the fin is exposed and does not feed until death. Can be sprinkled with 1 mg / kg of bleach or 0.3 mg / kg of strong chlorine in the whole field, repeated once in 24 hours, and then sprinkled every half a month for prevention.

5. Bubble disease: due to insufficient dissolved oxygen, excessive dissolved oxygen or excessive content of other gases in water, Loach floats on the surface and belly bulges like bubbles. Strengthen daily management to prevent the deterioration of water quality, immediately add new water when the disease occurs, and sprinkle it in the whole pool with 4kg of salt per mu.

Common diseases of lotus root

First, lotus root rot disease, also known as black root disease, lotus root plague. It is the first major disease in lotus root production, which is easy to occur in the old lotus root field and continuous cropping field with shallow tillage layer and shallow water, which affects the lotus root and reduces the yield. It is a disease of lotus root caused by Fusarium oxysporum, which is mainly harmful to underground stem, aboveground leaf and leaf surface. The leaves of diseased stems are light green in color, brown and withered from the leaf edge, and the petiole finally withered. Most of the bacteria invaded from the wound, absorbing root or growing point, and the bacteria spread with running water irrigation.

Second, the leaf blight of lotus root is the second most serious disease on lotus root, and the pathogen is the pathogenic fungus of monofilament. The main harm to the lotus leaf, the edge of the lotus leaf first appeared light yellow disease spot, and then gradually spread to the middle of the leaf, showing yellowish brown, and finally expanded from the mesophyll to the leaf vein, until the whole leaf withered. High temperature and rainy, conducive to the disease, lotus root field fertility is insufficient, the disease is serious.

Third, the leaf spot of lotus root is mainly harmful to leaves, and sometimes occurs on the petiole, which is caused by pathogenic fungi of the genus Cladosporium.

Varieties of lotus root

1. Elian No.1. It belongs to precocious variety. Few flowers, shallow mud, the main lotus root 6-7 nodes, 130cm long, a single weight of 5kg, the skin color is yellow and white. In the first ten days of July, 1000 kg per mu of green lotus root can be harvested and about 2000~2500kg can be harvested after September to October, which is suitable for stir-frying.

2. Elian No. 4. It belongs to the mid-ripe variety. The flowers are white, the main lotus root is 5-7 nodes, 120-150 cm long, the single support is about 5~6kg, the tip node is thick, and the skin is yellowish white. Green lotus root can be harvested in mid-late July, with a yield of about 750~1000kg per mu. In September, you can begin to harvest mature lotus root and yield 2500kg per mu. Raw food is sweeter, simmering soup is more powdered, and it is also suitable for stir-frying.

3. Elian No. 5 (3735) is early and mid-ripe. The main lotus root is 5-6 nodes, 120 cm long, with thick flesh, small ventilation holes and white skin. Green lotus root 500~800kg per mu in mid-late July and old mature lotus root 2500kg in late August. It has the advantages of vigorous growth, no premature senescence, strong stress resistance, stable production, good flavor of fried food and simmering soup, and is very popular in the south and export markets.

4. New No.1 lotus root. The main lotus root is 5-6 nodes, 120 cm long. The lotus root type is enlarged, the skin is white and the meat is crisp, and the commodity is good. After maturing in the middle and late August, the average yield per mu is about 2500kg. Simmering soup powder, cold salad, fried food taste sweet.

The mixed culture of lotus root and Loach can not only give full play to the mutually beneficial growth of lotus root and Loach, but also achieve a high-quality double harvest of products, such as this method of mixed culture is the most economical and affordable, and good learning of mixed culture technology is conducive to increasing production and income. if there is such a condition, it is suggested that we can try mixed culture technology.