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Putian area is suitable for 1-2 mu, generally 1-1.2 meters deep; digging aquaculture ditch around the field, 1.5-2.0 meters wide, 0.8-1.0 meters deep, inlet and outlet opening diagonally to keep the field water clean To prevent the accumulation of toxic substances and damage the fish; 8 to 12 cubic meters of fermented manure per acre is used as base fertilizer.
Second, lotus root cultivation
In March and April of each year, planting begins when the temperature reaches 15°C or more. When planting, the quail species are buried in the soil, the hoe is slightly deeper, and the end of the tail is slightly exposed on the water surface, showing a 20-30 degree inclination. The orientation of the pods is staggered. One row is eastward and the other is westward. The second row is opposite to the first row of plants so that the lotus roots and leaves can be evenly distributed. The row spacing is 2.0 meters, the plant spacing is 1.5 meters, and the planting depth is 10-15 centimeters. .
Third, fish species stocking
In mid-and late-May, when the water temperature is appropriate, the fishes will be released in time. Fish species use non-large-scale herbivorous fish such as carp, loach, scutellaria, carp, carp, carp, etc. Fish species should be diversified, so that the fish in different water layers can be matched to each other to make full use of water space. The eel has the characteristics of eating places, and stocking eel can effectively prevent the occurrence of large numbers of mantle. Stocking specifications rather big not small, density of 200-300 tail / acre is appropriate.
Fourth, field management
1, inspection field inspection: should pay attention to drought and flood control, timely drainage in the rainy days to prevent fish escape, timely injection. Water quality can be improved by spilling into the alum. In the event of a long period of rain, it is necessary to fill the water in time.
2. Water quality control: After the planting of earthworms, the shallow water level shall be maintained within 10 days in order to facilitate the increase of water temperature and promote germination; during the vigorous growth period, the water level shall be maintained between 15 and 20 centimeters; during crusting, the water depth shall be 5 to 10 centimeters. Every 40 days, 40 g/m3 of quicklime is used for disinfection.
3. Topdressing: Tian Zichang grows 3-4 pieces of vertical leaves and scabs, applying 300-500 kilograms of manure or farmyard fertilizer per mu. Fertilization should be done on a clear and windless morning. July-September is the peak period of fish feeding. Appropriate amount of rapeseed cake with both functions of feed and fertilizer should be put in place.
4. Tian Lu Management: When the vertical leaves are covered with ponds, the concealed floating leaves and the old-growth early leaves should be promptly removed to keep the ponds airy and clear; timely removal of excessive water from the fields prevents the fields from having to fight for nutrition. In the bud after the pedicel bent, but not broken, to avoid the consumption of nutrients; to prevent the application of high toxicity and high residual pesticides such as ammonium, to protect the safety of fish.
5. Set up black light lamps In the night of May to October, hang a few energy-saving black light lamps at 15 cm above the fish ditch to trap moths and insects in the field as food for sets of fish; the general trapping peak has three stages. In late May, late July, and late September, it lasts for about 10 days.
Efficient farming mode - Putian fish farming
I. Field construction
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