First, built pool: earthen pond and cement pool can be. The depth of the pool is about 1 meter, and the size of the rectangle is 10-30 square meters.
Second, water injection: The pool is about 50 cm deep. The suitable water temperature for leeches is 18-25°C, the pH is 7.5-8, and the dissolved oxygen saturation is 70-120%.
Third, fertilization: soil water per cubic meter of soil throw 4 kg of cattle, horse manure or other animal manure, 1.5 kilograms of rice straw, wheat straw or other non-toxic plant stems and leaves as a base fertilizer, top dressing 10 days later, the amount of top dressing with the base fertilizer, and thereafter according to the water color Topdressing as appropriate to keep the water brown. Each cubic meter of water in the cement pool is cast with 1.5 kg of cattle, horse dung or other animal excrement, and 1.5-2 kg of geotextile. After that, the fertilizer is topdressed once every 8 days. The topdressing amount is 0.75 kg of cattle, horse dung or other livestock manure.
IV. Cultivation: Whether it is an earthen pond or a mud pool, a mixed culture method of yeast and inorganic fertilizer can be used. For each cubic metre of water, 20 grams of yeast is inoculated, and the yeast can be soaked in water for 3-4 hours before being poured into the pool. Each cubn of water is applied with 65 grams of ammonium carbonate and 37.5 grams of ammonium nitrate. After every 5 days, the yeast is applied. The dosage is half of the beginning. After the yeast is introduced, the pool water is exposed for 1-3 days, and then the water bream can be placed in a seed amount of 30-50 grams per cubic meter of water.
V. Fishing: After 15-20 days into the pool, the species of leeches can be covered in the whole pond after extensive breeding. At this time, feed fish in batches. It is usually taken once every 1-2 days, and the total amount is 10-20%. In the water temperature of 18-20 °C environment, you can often fishing, continuous.
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