What do you think you need to pay attention to when farming crayfish?

First of all, it is necessary to pay attention to the balance of acid-base, as well as the prevention of this disease.

Poplar growth must have sufficient water, but not so that the poplar can be soaked in water all year round, so some poplar planting bosses will dig a ditch in the forest to facilitate water filtration. Although this is effective, it wastes land resources. Since last year, we have supported Ning Guang'e in Babao Hongqi Village to dig shrimp ditches in the open space between poplar forests to breed crayfish.

Ningguang'e contracted 100 acres of low-lying fields to plant 9,000 poplars, and under our guidance, 19 shrimp ditches were excavated using glades, covering an area of 40 acres. The renovation project was completed at the end of last year, a total of 4,000 pounds of shrimp seeds were released this spring, and the lobster is now growing gratifyingly, and it is expected to generate an income of 50,000 yuan. Practice has proved that forest shrimp intercropping not only makes full use of the glade, but also increases economic income; Moreover, the shrimp ditch plays a good role in water retention and water filtration, which is very conducive to the growth of poplars.

This mode of shrimp ditch must be dug deeply, generally in about meters, and the water can only be turned off in 1 meter, so as to facilitate water retention and water filtration.

It is necessary to pay attention to feed feeding, crayfish are omnivorous, like to eat animal bait, and gluttony, large amount of food, insufficient bait is easy to cause cannibalism. At present, chickens, ducks, pigs and other livestock and poultry offal are cheap, and some farmers feed the livestock and poultry offal as a whole, and do not beat evenly, resulting in crayfish fighting each other when feeding, and the water body becomes black and smelly, which is very easy to cause diseases, resulting in the failure of some farmers. It is necessary to adhere to the combination of fine and green, and flexibly grasp the amount of bait according to the feeding situation.

The crayfish's burrowing ability and escape ability are top-notch, so be sure to keep a solid presence around the pond and don't let it escape.

I used to raise this at home, and the most important thing to pay attention to is to plant aquatic plants. Many of the ponds where crayfish are farmed are converted from fishing ponds, and there are no aquatic weeds, in fact, crayfish are the same as green shrimp and river crabs, and they also need aquatic weeds. One of the reasons why some farmers fail to grow aquatic weeds is that they do not grow aquatic plants.

Aquatic plants can not only provide a shelter for crayfish to inhabit and shell, but also purify water quality, increase dissolved oxygen, and provide fresh natural plant-based bait for crayfish, the biggest benefit of which is to reduce crayfish cannibalism. The aquatic weed species mainly include black algae, elophylla, bitter grass, water peanut, etc., accounting for 20% to 30% of the aquaculture area. ‍

In the past, a relative's family was to breed this crayfish, crayfish disease resistance is strong, in the natural waters are not easy to get disease, after the pond high-density breeding, improper management is also easy to cause the occurrence of diseases, mainly ciliosis, black gill disease and hemorrhagic disease. It is necessary to adhere to the precautionary principle, regularly use quicklime (20ppm) to splash the whole pool, and use it alternately. Crayfish are very sensitive to pesticides, and pesticides such as trichlorfon and dichlorfon are prohibited, and it is also necessary to prevent a large amount of farmland potions from flowing into shrimp ponds, causing unnecessary losses.

10-15 days before the stocking of shrimp seedlings, generally apply 100-200 kg of fully decomposed manure such as pig manure per mu of water surface to cultivate plankton and provide an appropriate amount of organic debris for shrimp feed. Within 3 days after the seedling, put the minced small fish and minced meat, 3 days after 1 month to put the small trash fish, the lower foot minced meat or compound feed, when the shrimp seedlings grow to 6-7 cm, can be fed with crushed snails, mussels and an appropriate amount of plant feed such as wheat, bran, corn, cake meal, etc. or compound feed.

Let's make shrimp and rice. Using the free time from the harvest of medium rice in September of the same year to the middle rice transplanting period in June of the following year, the continuous cropping mode of stocking crayfish for one season after a slight modification of the plot. This model makes reasonable use of the seasonal characteristics of medium rice and crayfish growth, and hits a time difference.

It does not affect the yield of rice, but also increases economic income, makes full use of the paddy field, and improves the efficiency of the field. According to our follow-up survey, the rice in the middle paddy field that has carried out shrimp and rice continuous cropping not only does not reduce the yield, but can increase the rice yield by 40-50 per mu, and the crayfish can generate about 1,000 yuan per mu. Due to the low technical content of shrimp and rice continuous cropping, short cycle and quick effect, extensive management and easy operation, low labor intensity, low investment and high efficiency, it has always been the traditional dominant model of crayfish wild foster care mode, which is suitable for continuous development in large areas of winter idle paddy fields, especially in those paddy fields that cannot change the use of the field and abandon it in winter.

This mode of shrimp ditch must be dug well, the inlet and drainage outlets should be dense, the aquatic weeds should be transplanted in place, the rice should be harvested with high poles, and the application of drugs should be paid attention to.

First of all, when digging ponds, you have to learn to plan and dig, and generally don't understand can find shrimp seedlings to solve, the second is: water quality must be taken into account when selecting land, there is no pesticide pollution in the upstream, and there is flowing water for a long time! The third is:

Feed feeding method, aquatic weed cultivation technology. The fourth is: the daily management of the later stage, the daily life of the lobster, whether there is any disease, escape, obstruction, disease prevention, and other measures to maintain!

The yield of lobster depends on the later management! With good management, the shrimp can be released in 45 days!

Pay attention to the water quality, although the crayfish have strong viability and are resistant to low oxygen, the fresh water quality is still one of the key factors for the high yield of crayfish. In the environment of low dissolved oxygen, crayfish appetite decreases, grows slowly, and is easy to cause escape and disease, once a large number of crayfish are found to crawl to the shore or float on the grass, the water should be changed immediately, especially in the middle and late stages of breeding, the water should be changed 1 to 2 times a week to maintain a high dissolved oxygen in the water.

Freshwater lobster, commonly known as Australian red crayfish. In the 90s, China introduced a successful aquaculture experiment, and the shrimp has the characteristics of fast growth, large size, high yield, miscellaneous diet, and high meat yield. The breeding technology is introduced as follows:

1. Pond conditions. The water surface of the pond should not be too large, the suitable water surface is 1 2 acres, the water depth is 1 15 meters, and it has a perfect drainage and aeration system; The bottom of the pond has a slight slope, no leakage, and the anti-escape facilities are repaired. Before stocking, the pond must be cleared (dry method) to remove debris and weeds, so as not to leave enemies and pathogens in the pond, and disinfect with 150 200 kg of quicklime per mu of water surface.

Lobsters like shade and fear of light, good at climbing and crawling, require aquatic plants on the water body, accounting for about 1 3 of the water surface, can be planted aquatic plants, such as wheel black leaf algae, grass and so on, at the same time at the bottom of the pond should be set up with bricks, stones and bamboo tubes and other hidden objects for its habitat and burrowing.

2. Stocking of shrimp seedlings. Lime water disinfection can be put after 7 10 days of normal water quality, the water temperature requirements are relatively high, the appropriate growth water temperature is 20 30, less than 15 when rarely eaten. The water body should maintain high dissolved oxygen, and the dissolved oxygen should be more than 50 mg.

The transparency of the water body should be 30-40 cm. pH. Shrimp fry are stocked with centimeters at a stocking density of 4,000 to 7,000 acres.

When the seedlings are released, the plastic bag containing the shrimp seedlings is placed in the pond for 30 minutes and then opened, so that the shrimp seedlings gradually adapt to the water temperature in the pond, which is conducive to improving the survival rate of shrimp seedlings. Stocking for about 1 month, may.

60 100 acres of 50 250 grams of silver carp were stocked in due course. Freshwater lobsters are benthic crustaceans, and proper polyculture of pelagic filter-feeding fish can not only improve the growth environment of lobsters, but also serve as indicator fish for hypoxia in ponds. But do not mix carnivorous and eating fish, so as not to affect the growth of lobsters.

3. Feeding with bait. Shrimp seedlings put in the pond for 30 minutes after the start of feeding, the early stage to feed cooked soybean pulp, and then add a small amount of small trash fish and snail meat, etc., the feeding amount of shrimp weight 6 8%, divided into morning and evening two feeding. According to the feeding habits, the total amount of the day in the evening is about 2 3, and the combination of fixed points and pond sprinkling is adopted.

In the middle stage, the water temperature is high, the feeding is vigorous, and the feeding amount is 10%. In the later stage, shrimp bait can also be fed with 25% of compound feed such as miscellaneous fish, soybean meal, wheat bran, green vegetables, etc., and the daily feeding amount changes with the water temperature, which is flexible to master.

Fourth, daily management. Strengthen water quality management to ensure sufficient dissolved oxygen and fresh water quality. In the high temperature season, prevent shrimp from floating and increase the aerator. When the water quality is too fertilized, use quicklime to sanitize plankton, and splash the whole pool. Pay attention to patrolling the pond to remove predators, frogs, snakes, etc.

Crayfish must be kept away from the source of pollution at the mouth of the pond, the mouth of the pond must be drained, water storage is convenient. Crayfish have the habit of escaping back to the water, and anti-escape facilities should be set up around them, especially the water inlet and outlet, to avoid escape. Lobster fishing varies according to the stocking season, generally can choose to concentrate on fishing in June-July and November-December every year, if the introduction of wild lobster species, you need to domesticate for a period of time in advance before stocking.

1. What conditions and technologies are needed to raise crayfish 1. What conditions are needed to raise crayfish (1) To raise crayfish, we must first choose a pond far away from the source of pollution, and the pond should be convenient for drainage and water storage. Before breeding crayfish, the pond should be thoroughly disinfected, and quicklime can be used for disinfection products, and planktonic microorganisms should be appropriately put into the pond, and aquatic plants should be planted. (2) Crayfish have the habit of escaping back to the water, so anti-escape facilities should be set up around the pond.

Especially the inlet and outlet, avoid escaping, and you can raise crayfish after it is ready, and you must pay attention to the stocking density and feeding method when breeding. 2. What technology is needed to raise crayfish (1) Scientific and reasonable fishing of lobsters must be decided according to the stocking season, and generally can be selected in June to July and November to December every year for fishing. It is also possible to catch large lobsters that have reached the market size first, and then continue to release new lobsters, so that lobsters can be caught all year round.

2) Do a good job of breeding planning in advance, if you introduce wild lobster species, you must first domesticate for a period of time in advance before stocking. Generally, the first year of crayfish breeding is mainly to do a good job in breeding, stocking shrimp seedlings is generally carried out in summer, and lobsters that grow up in the early stage of autumn and winter and spring are mainly stocked. Second, crayfish breeding methods and environment 1, seed procurement:

Be sure to purchase shrimp fry before raising crayfish. Try to purchase locally, avoid long-distance transportation of seedlings, and the windproof and dehydration of seedlings during transportation must be done. 2. Bait feeding:

In addition to the natural bait provided by the aquaculture waters, artificially assisted bait delivery is also extremely important. When feeding, bait with different diameters and protein content can be selected according to the different growth periods of crayfish, and the bait can not be fed too much. 3. Water quality management:

Water quality management mainly includes water level management, water quality, dissolved oxygen, etc., and the water level must be constantly adjusted according to the season, temperature, climate, and crayfish growth cycle. The water quality should maintain appropriate fertility, water color, etc., and crayfish can only grow healthily in a good water environment. 4. Living environment:

The environment will directly affect the yield of lobsters, and the breeding process should ensure that the pH value of the pool water is between and the transparency is about 40cm. In order to ensure the water quality, in addition to filling the pool with new water frequently, it is also necessary to regularly sprinkle quicklime solution in the pool for disinfection.

1. Management of water level and water quality.

Generally, the water level of pond breeding crayfish is kept at about 1 meter, because crayfish have the habit of burrowing above the water level, and the water level can not be high or low, otherwise the crayfish repeated burrowing is easy to consume the energy of crayfish, resulting in reduced production.

2. Plant grass and throw snails.

Appropriate density of aquatic plants can provide plant bait and animal bait for crayfish, increase the amount of dissolved oxygen in the pond through the photosynthesis of aquatic plants, and provide a place for crayfish to escape the heat and cool down in the summer high temperature season. It can also provide a safe place for crayfish to molt and avoid predators, and aquatic weeds are particularly important.

3. Bait feeding technology.

The principle of bait feeding ensures that the crayfish are full, well-eaten, evenly eaten, and finished, leaving no residual bait. The daily feeding amount should be arranged according to 2%-5% of the total weight of crayfish in the storage pond. 2 times a day, 1 time in the morning and 1 time in the evening, and the amount of feeding in the evening accounts for 60%-70% of the whole day.

4. Prevention and control of pests and diseases.

Adhere to the principle of giving priority to prevention, combining prevention and treatment, preventing diseases first, and treating diseases early, and do a good job of disease prevention on a regular and targeted basis.

5. Daily management.

Insist on patrolling the pond once a day in the morning and evening, carefully observe the activities, growth and feeding of crayfish, pay attention to changes in water quality, and deal with abnormal situations in time.

6. Catch the big and keep the small, and go public in a timely manner.

After about four months of careful breeding, the crayfish that have reached the commercial specifications can be caught and marketed in a timely manner, and the large and small fish can be caught and marketed in a balanced manner, so as to reduce the density of the pond shrimp and promote the rapid growth of crayfish.

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1.Pick a rice field:The selection criteria for paddy fields are:

Water resources are abundant. The water body is excellent. Convenient irrigation.

Plenty of light. Great location and quiet surroundings. Water resources should be selected with zero pollution of large and medium-sized water quality, and the middle and late stages of the countryside should be ensured that there will be no major drought.

Flood hazard.

2.Construction works: The key to field construction projects includes the widening of field ridges.

Widen. The structure is reinforced, and the water inlet and outlet are set with filtration. anti-run-off equipment, while carrying out annular grooves.

Excavation of foundation pits in field ditches, equipment shelters, etc.

3.Disinfection and sterilization. Cultivating water:

To carry out disinfection and sterilization solutions for the ethnic farmland, quicklime powder can be sprayed, and after the poison subsides, water can seep. Then irrigate 65-85cm into the field ditch and apply enough organic fertilizer to cultivate the material microorganisms. Then plant aquatic plants in the field ditch to ensure that the aquatic grass coverage rate is above 50% to meet the needs of lobster growth and development.

4.Grow paddy: Throwing seedlings in mid to late May, moving in mid to late June, maintaining a water level of 11cm in the field after cutting, and after the seedlings survive for 22 days, let the lobster enter the rice field and eat insects and weeds in the field.

5.Raising shrimp seedlingsBecause the paddy field has been cultivated at this time, the lobster is easy to adapt to the new environment, and then reasonably prevent the damage to the seedlings when the agricultural land is used, and improve the survival rate of the shrimp species.

Usually the free-range gauge is 200-500 (kg) and the stocking density is 10,000.

6.Feed concentrated:Crayfish farming in rice fields should be as timely as possible.

Precise positioning. Quantitative analysis. Qualitative bait, lobster meat miscellaneous, meat essence.

Green storage fodder are eaten. The daily input is usually 4%-6% of the weight of the shrimp. Initially, feed 2 times a day.

1 time each at noon; In the middle and late stages, 1 feeding is given around 6 p.m.

7.Feeding management methods:After the lobster is free-range, it is necessary to immediately carry out the management method of Tiantao, effectively control the water level, maintain the temperature, and usually do a good job in flood control.

Waterlogging prevention and anti-running work, and reasonable prevention of viral infection, nemesis.