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Rice field crabs benefit double income
Rice field crabs, Panjin has expanded to a million acres last year, many new farmers. In order to help new farmers acquire technology, the rice paddy farming techniques promoted in Panjin are described below. First, the choice of rice fields Rice fields rich in water, water and drainage convenience, the soil is close to the soil, water conservation and moderate fertility, suitable for crabs in paddy fields. II. Paddy field facilities Around each rice pond, a ditch with a width of 1m and a depth of 0.6m is dug. The field has a “+†ditch. The area of ​​the ditch is 32.5% of the total area. The height of the earth excavated from the ring ditch shall be heightened and reinforced by the pool embankment and shall be compacted. Before laying the seedlings, around the pool embankment with a double plastic film to fence the rice field, 65-70 cm high, at the same time, in the rice field, the drainage outlet with a double screen to prevent escape. The basal fertilizer should be applied before transplanting, and rice should be transplanted in late May. When transplanting, the spacing should be 21-26 cm, and the spacing should be 14-16 cm. Appropriate increase in planting density near the ditch should be used to bring about the marginal advantage. At the same time, ensure that the living environment of crabs is well ventilated and has good ventilation. Third, the crab stocking 1. Paddy field ditch disinfection in the water 10 days before the release, and quicklime 150 kg / mu Quanchiposa, killing bacteria and enemy pests. 2. After the rice seedlings are returned to green in June, the seedlings will be released and the crab seedling size will be 5-6 grams per tail, with an average stocking density of 800 tails per mu. Fourth, management 1. Feeding training crabs to the ditch ditch to feed. After the formation of conditional reflexes, the “four determinants†will be fed, and feed types will be adjusted at any time according to the season and crab growth conditions to meet the nutritional needs of different stages of crab growth. Feeding is started in early July, and the special compound feed for crabs with a protein content of 32% to 36% is used as the main ingredient to promote the survival rate of crabs and restore their constitution; from the early July to the mid-August high season, plants are planted with aquatic plants. The roughage of feedstuffs and low protein content is the main factor. At the same time, attention should be paid to the rotted grasses and mouldy feedstuffs. After mid-August, the food crops with higher starch content, animal feeds (such as snails) and compound feeds should be promoted. Crab fattening. Feeding amount is basically finished within 1 hour. 2. Water quality management According to the growth needs of crabs, timely injection, drainage adjustment of water temperature, water quality, shallow shallow irrigation at low temperatures, deepening the water level in summer hot season and increase the number of water changes, each changing the water about 1/3, to prevent excessive temperature changes. 3. Prevention and control of rice diseases Pay attention to rice growth, use as little or no medicine as possible, and disable organophosphorus pesticides. If necessary, use low-toxicity drugs and use spraying methods to minimize the scattering of pesticides on the surface and water surface. Mix water after application and keep the field fresh and clean so as not to endanger crabs. 4. Crab disease prevention crabs before entering the pool with potassium permanganate 2010 negative power 6-8 bath for 5-8 minutes, keeping in order to maintain the main prevention: First, regular disinfection of pool water, regular removal of residual baits, disinfection of food The second is every 10-15 days with lime 10 kg / mu Quanchiposa, both to kill bacteria, eliminate predators, but also to supplement the calcium needed for crab; three is washed before entering the pool, and strong Chlorine spray disinfection, the amount of 500 grams of strong chlorine mixed with water 20 kg.