First, the field construction Putian area to 1-2 acres is appropriate, generally deep 1-1.2 meters; in the field around the digging of aquaculture ditch, width 1.5-2.0 meters, 0.8-1.0 meters deep, into the outlet opening diagonally to Keep the water quality in the field clean, prevent toxic substances from accumulating and harming the fish, and use 8-12 cubic meters of manure fermented and cooked as the base fertilizer.
Second, lotus root cultivation Every year in March and April, when the temperature reaches 15°C or more, planting begins. 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 fishes such as carp, loach, carp, carp, carp, etc. Fish species should be diversified, so that fish in different water layers can be used together to make full use of water space; carp has The characteristics of eating places, stocking some carp 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. Top-dressing: When Tian Tian is coupled with 3-4 leaves and scabs, 300-500 kilograms of manure or manure is applied 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 a black light: In the night of May- October, hang a few energy-saving black light bulbs at 15 cm above the fish ditch to trap moths and other insects in the field as a set of food for fish culture; the general lure peak has three stages. , that is, in late May, late July, late September, lasting about 10 days.
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