Raising mud in the paddy fields can not only increase the production of lotus roots, but also increase the efficiency of aquaculture and promote the balance of ecological environment in Dianchi Lake. So how do you keep mud in the fields?
1. Putian pond construction
Putian should be selected in a sunny location, with a flat terrain, convenient irrigation, good water retention, and flood protection. Putian need to be heightened and reinforced around the field, Tianshen control at 0.5-0.6 meters, water depth control at 0.2-0.3 meters, and set off at the inlet and outlet to prevent escape from the mud. With the cement board standing on the wall of the field, the cement-free board can be replaced with a thicker plastic film, and the cement board joint should be sealed with cement.
Putian
Do a good job in collecting fish pits: dig a 0.3-0.4m deep pit in the dike pool that communicates with the outlet, and dig a deep trench 0.3-0.4m deep in the center of the paddy field, which covers about 1/10 of the total area. -1/l5 or so. The use of deep-water pits and deep-water trenches is as convenient as muddy summers and on-market fishing. The ditch is flush with water.
2. Putian disinfection
The water depth of Putian is controlled at about 0.1 meters, and the muddy seedlings should be disinfected before they are put into use. Lime calcined with 60 kg/mu of mash and stirred with hot water, splashed all over the field, or bleached with 15 kg of kilograms or 5 kg of strong chlorine. After the water is sprayed, all fields must be splashed. Disinfectants must be dissolved with plastics. Disinfection 5-7 days after the change of water, change the water after the injection of new water can be put test fish to detect whether the toxicity of field water disappeared. Test fish can choose white peony or flower pot, test water fish can be put into the muddy seedlings after normal life.
3, lotus root cultivation
Spring pod species generally need to be raised above 15°C in temperature, 0.1m deep in Dianchi Lake, and planted when the ground temperature is above 12°C. In the 15-20 days before the seedlings, 800-1000 kg of fertilizer is applied per acre, the fertilizer is thoroughly distributed, and the bottom of the pond is ploughed and leveled, and 80-100 kg of lime are used for routine disinfection per acre. To choose fresh, stout, bud, fine section, roots must be complete, no injury, more than 3 sections of the complete species, with 250-300 kg per mu. After the planting is completed, the water is stored 0.1 meters deep, and the inlet is screened with a 30-mesh sieve to prevent wild and miscellaneous fish from entering.
Putian stocking muddy seedlings
4, seedlings stocking
After the two leaves are grown up and the temperature of the water is stable at 20°C or more, the seedlings can be planted. One week before the loach stocking, 150-200 kg of organic fertilizer such as chicken manure, pig manure, cow dung and other organic fertilizers may be topdressed and 15-20 kg of superphosphate may be used to fertilize the water quality, and new water may be added at the same time. The water level reaches 0.3 meters. Before and after the Ching Ming Festival, 20,000 tadpoles were placed per acre. Seedlings should be selected and used in accordance with the national pollution-free seed production technology and operating specifications of neat, robust loach species, before entering the pool with 3% salt water soak for 5-10 minutes, disinfection and disease prevention.
5, daily management of Putian
1 water quality regulation
As the temperature in summer continues to increase, new water should be added as soon as possible without affecting the growth of earthworms. In early June, the water level will reach a maximum of about 0.3-0.5 meters. Change the water once a week from July to September, changing the water 0.1 meters each time, once a month. Four kilograms of quicklime Quanchiposa per acre is used to regulate water quality and prevent disease.
2 Harvesting
In early October, the mud pools in Dianchi Lake began to be arrested. After several consecutive days, the rate of mud-fishing in the pool can reach more than 90%. After the loach is harvested, the harvesting is started and the time is usually at the end of October.
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