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1. Pond selection: The clear area should be 3-5 mu, and the depth is 2.0-2.5m (effectively impounding 1,5-2.0m). The bottom of the pool is flat (easy to pull the net), and the sediment quality is less than 25cm thick. , near water. First disinfect with quicklime or bleaching powder, then apply basal fertilizer (such as manure: 400-500kg/mu) one week before the fish species enters the pond to fertilize water quality and plankton.
2. Weed transplantation According to summary, it is better to choose submerged plants. Due to the palatable and nutritive value of the plant's water and grass feed, the black-leaf algae and Vallisneria can be selected. The shifting work should also be completed as soon as possible after disinfection.
3. Seed rearing due to the fact that both herbivorous and omnivorous fish can swallow shrimp seedlings, and there are many recipes for green shrimp, in order to avoid the occurrence of residue and food bait contention between seedlings, it should not be associated with grass, alfalfa, cockroaches, cockroaches, etc. Polyculture can only be mixed with filter-feeding fish (eg, oysters, clams, etc.). First put the shrimp seedlings, then fish species, shrimp stocking for the end of June to early July, stocking specifications 0.8-1.0cm / put 8000-10000 tail / mu. Half a month later, summer fish species will be released, 10,000-15,000 tail/mu, and 1500-2000 tail/mu.
4, daily management
4.1 Feed Management After the fish species is under the pond, bean cake (bean curd refuse) can be used for feeding, twice a day, 8:00-10:00 and 6:00-18:00. Feeding amount was 0.8-1.0kg/ten thousand at the beginning of the day, and it increased day by day, and after one day it reached 2.0-3.0kg. When the water temperature in the autumn falls below 150c, the amount of feed should be reduced as appropriate. Start splashing around the pond and gradually feed it on a regular basis.
4.2 Appropriate amounts of top dressings are plankton-based foods. Therefore, bait fertilizer can be used and used to supplement the bait and reduce the cost. Top dressing principle: The water fertilizer, tender, live, cool as the standard, see water fertilization. It is added 1-2 times a month, and each time a manure is applied around 150kg/mu.
4.3 Disease prevention and prevention Flooding ponds Lime water is sprayed 1-2 times a month, with a concentration of 2.5*10-6-3.0*10-6 to eliminate pathogens and regulate water acidity. Do not use organic phosphorus, ester drugs to prevent poisoning of shrimp, should change the water regularly.
5. Harvesting When the water temperature drops to about 100c, it is timely to pull the net and catch the fish to complete the marketing of the shrimp and the wintering work of the fish species and the pond. After culturing from March to April, the size of the fish can reach 12-13cm/tail, the survival rate is about 90%, the green shrimp is 3-5cm, and the survival rate is about 70%.
Fish pond mixed polyculture shrimp production technology
In the case of mixed-cultivated green prawns of the ageing Fish ponds, without increasing the input of bait (not feeding shrimp feed), as long as the management is properly carried out, the yield per hectare can be increased by 15-20 kg and the profit is 300-400 yuan.