Around the Mid Autumn Festival, which 4 kinds of crabs can t be bought, and the old fishermen don t

There are four types of crabs that cannot be bought around the Mid-Autumn Festival, the first is a yellow-shelled crab, the second is a crab that feels very light when you pick it up, the third is a crab with very little chelicerae fluff, and the fourth is a crab with spots on the shell.

Yellow-shelled crabs, crabs that are relatively light in weight, crabs with spots on their shells, crabs with few chelicerae hairs, these 4 kinds of crabs cannot be bought, they are not of good quality.

Yellow-shelled crabs, crabs with very light legs, crabs with few chelicerae hairs, and crabs with spots on their shells.

The Mid-Autumn Festival is the best time to eat crabs, think about it, but the ** of high-quality hairy crabs is not low, and it is a good choice to eat crabs to improve your life, but as everyone's living standards are getting higher and higher, the pursuit of quality is getting higher and higher. Pond crab farming is a new development of aquaculture, with an average yield of 100 kg per mu and a high yield of 300 kg, with very high economic benefits. How to raise a good freshwater crab?

The breeding technology of freshwater crabs is detailed below. The suitable water temperature for crabs is around 20. When the water temperature is at a lower level, the amount of movement of the crab decreases, which affects the amount of food consumed by the crab, which makes the amount of food consumed by the crab decrease.

If the water temperature is high, it will promote the activity of the crabs, so that the amount of exercise of the crabs will increase, and the intake will also increase. In the spring or during the crab life, the water depth is controlled at about 1 meter, in the summer it is meters, and in the autumn it is meters. Hot temperatures increase the depth of the water and lower the bottom temperature.

Water quality control water visible transparency is generally 50-60 cm. The water is too clear or too muddy, and the physical and chemical properties of the water have an impact on the growth of crabs. Before feeding, the excess silt in the pond should be removed, and then the pond should be dried and evenly sprinkled in the pond with quicklime.

According to their own conditions, try to choose excellent water sources, plant aquatic plants reasonably, and feed crab seedlings after the water body is stable. The feeding density should be reasonable to avoid excessive density and turbidity caused by grabbing food. Choose high-quality feed to promote the absorption and utilization of nutrients by river crabs, reduce the pollution of feed to water quality, and reduce the amount of harmful substances in the water.

Check the pH of your water regularly to see how your water is changing.

In the pond, if blue-green algae appear, control it in time, or replace the pool water, and when the organic matter content in the water exceeds the standard, it is necessary to increase the water change or water change. In summer, it is necessary to prevent the overgrowth of aquatic plants and algae, and the excess aquatic plants in the crab pond should be removed in time to control the overgrowth of phytoplankton. For more information about agriculture, rural areas, and rural areas, please click Rural Lu Bu to discuss agriculture, rural areas, rural areas, and serve agriculture, rural areas, and rural areas.

As the old saying goes, "the size of the crab depends on the aquatic weeds, and the number of crabs depends on the aquatic weeds", which shows the importance of aquatic plants in the process of river crab breeding. It can not only provide a shelter (perch, molt and avoid predators) for river crabs, but also can purify water quality by releasing oxygen in the water, consuming excess nutrients in the water, inhibiting the growth of single-celled algae, and effectively reducing the accumulated temperature and providing shade for river crabs during high temperature periods. Aquatic weeds are also bioactive baits that river crabs like to eat.

The distribution of aquatic weeds in the crab pond should be sparse and dense, and the aquatic weed coverage rate should be kept at 60% 70% during the growth period of river crabs. Once the above situation occurs, the cause should be found out in time and used reasonably"Youcaoling".In order to improve the condition of aquatic weeds, Youcaolin has played an active role in river crab breeding in many places.

The pond should maintain a high water level, the pond should be often added and changed water, generally required to add water once in 2-3 days, change the water once in 5-7 days, choose to enter the water in the morning or evening, should not add water at noon, in order to prevent the temperature is too high to hurt the crab body. It may be due to multiple factors such as poor water quality regulation and inadequate sterilization and disinfection, which may lead to stressful phenomena such as crawling and lying on the grass, which may even lead to death in severe cases. In response to this situation, many farmers will use it"Eugen".Complex toxin, anti-stress, it can complex a variety of toxins in the water body, inhibit the generation of ammonia nitrogen, nitrite and other harmful substances, increase the dissolved oxygen in the water body, and repair the bad water body; In addition, it is rich in nutrients such as small peptides, which can also reduce the stress damage of river crabs caused by changes in the external environment.

It is recommended to control the amount of feed in 7-8% of the pond volume, and if the body fat content of the crab is too high, it is not conducive to the molting of river crabs, the proportion of animal and plant bait should be appropriately adjusted, and the proportion of plant bait (such as wheat, corn, aquatic weeds, etc.) should be higher than that of animal bait. For crab ponds fed with pellets, you may wish to consider mixing (dry mixing) in the feed"Staling".After use, the feeding speed of river crabs is significantly accelerated, the bottom quality is stable, the residual bait is less, and the water quality is easier to control in high temperature days. In addition, Staling also has beneficial effects such as protecting the liver and gallbladder and improving intestinal adaptability, and has been widely used in aquaculture in many places.

When breeding, we must choose a better variety, and then we should also feed some nutritious feed or small fish and shrimp in a timely manner, and we also need to clean up the pond regularly, to keep the pond water clean and hygienic, and also need to remove some weeds in the water to keep the oxygen in the water sufficient.

When breeding crabs, we must pay attention to the problem of water, and then we should also choose the right breeding area, to maintain the temperature in the water, we also need to ensure that the oxygen in the water is sufficient, and we must choose to feed some nutritious feed, so as to make the crabs more fat.

The water quality must be good, the water source must be sufficient, there must be convenient drainage, good air permeability must be ensured, and good varieties must be selected.

Crab is a delicious food, the best season to eat this food is in autumn, there are some particularities when eating crabs, you can't eat crabs when eating crabs, crab gills, crab stomachs, crab hearts and crab intestines.

Crabs are available all year round, but in autumn there are a large number of crabs on the market, which is also the best time to eat crabs, and in late autumn, it is a very good thing to eat crabs, because this is a relatively strong food. In autumn, the crab is very fat, and eating crab meat feels particularly delicious, which is also suitable for autumn characteristics. In late autumn, it is a very good thing for people to eat hairy crabs, and when eating crabs, they must buy some fresh crabs, for some dead crabs can not be eaten, because the total number of colonies in this crab is exceeded.

The main reason is that this kind of food is scavengers, and it is easy to breed bacteria in some environments, and if it survives in the lotus pond for a long time, it is easy to be polluted, and there will be more bacteria in it, and there will be some microorganisms or parasites.

Fresh crab immunity is relatively strong, it can inhibit the appearance of some original microorganisms, after the crab dies, the protein in it will also become the medium of microorganisms, and some toxins will appear. When people eat some dead crabs, they are prone to nausea, fever, vomiting, and abdominal pain, and may also have diarrhea, resulting in acute gastroenteritis, and severe people will have coma and shock. Eating this kind of crab can also cause Zuan poisoning in the human body, mainly crabs, which have a protein in the body and a large amount of histidine in it.

When these substances are converted into toxic substances, they are called histamine, which is also the main medium of allergic diseases, which is highly toxic and heat-resistant, and even after the crab is cooked, it will have this toxicity and is not easy to be destroyed. People can't eat raw crabs when they eat crabs, mainly there will be lung flukes in them, when this parasite enters the human body, there will be health risks, it is best to choose to eat fresh and cooked crabs.

The importance of eating crabs lies in the fact that we should pay attention to some parts of the crab in the process of eating crabs, and also pay attention to the fact that in the process of eating crabs, it is best to dip the crab roe in ginger vinegar and eat it together, using eight pieces of crab; These parts such as crab gills and crab stomachs are not allowed to be eaten.

The heart of a crab cannot be eaten, the pincers of a crab cannot be eaten, the lungs of a crab cannot be eaten, and the gills of a crab cannot be eaten.

Freshly dead crabs can be eaten, but if the crabs have been dead for too long, they must not be eaten, otherwise there will be a large number of toxins in them, which will have a great impact on our health.

Freshly dead crabs can be eaten, be sure to boil them in hot water, the temperature is about 100 degrees, and then you can add a little seasoning.

Of course, no, because it is very likely that your body will be poisoned, and it may also cause some other diseases.

During the Mid-Autumn Festival, in addition to mooncakes, there is actually a very popular ingredient, crab. Among them, the most famous is the hairy crab in Yangcheng Lake, in 2007, a king crab in Yangcheng Lake was 1800 yuan; By 2018, a crab king was sold for 8,800 yuan, as for whether it is worth it? It depends on your own pocket.

When many people buy crabs, they will see merchants selling crabs under the sign of Yangcheng Lake hairy crabs, at this time you have to be vigilant, the production of hairy crabs in Yangcheng Lake is very rare, the most authentic Yangcheng Lake hairy crabs, the annual output is about 1500 tons, in other words, it is almost 5 million. Just this yield, it is enough for Shanghainese to eat for 5 or 6 days, do you want to think that you are really a hairy crab in Yangcheng Lake?

Since I can't buy authentic Yangcheng Lake hairy crabs, I can actually buy some other places to try them, especially for me with limited funds, it is enough to try them, like the local Junshan Lake hairy crabs, which are also very delicious.

Why is it recommended that everyone eat hairy crabs around the Mid-Autumn Festival?

First of all, it is caused by traditional customs, the custom of eating hairy crabs during the Mid-Autumn Festival has a long history in China, but all traditional festivals are basically related to eating, such as eating zongzi during the Dragon Boat Festival, eating moon cakes in the Mid-Autumn Festival and so on.

Secondly, from the perspective of nutritional value, crabs are rich in protein and trace elements, and they are also good for nourishment.

Finally, the hairy crabs around the Mid-Autumn Festival, after the experience of spring and summer, the crab meat and crab roe have been porcelain and tendon. As the saying goes: "The delicacies of the mountains are inferior to the seafood, and the seafood is inferior to the freshness of the lake." In the fresh lake, the lake crab comes out on top."

Although the hairy crab is delicious, but when eating crabs, I am particular about it, these 3 kinds of crabs never eat when I meet them, and the mouth has a poor sense of nucleus and no nutrition.

The first, the dead crab. Crabs actually have a strong ability to survive, but once they die, the histidine in the body will decompose to produce histamine, which is a harmful substance to the human body, and this substance is also resistant to high temperatures, and it is difficult to be destroyed by frying, frying, and boiling cooking techniques.

Second, there are no steamed crabs. In order to pursue its deliciousness, and pay attention to the freshness and tenderness of the crab roe, many people do not cook the crab thoroughly when cooking, in fact, the crab is on the body, because of the water quality and environment, there are some bacteria in the body, and it must be completely cooked before it can be eaten.

The third type is a crab that has not been cleaned on the outside and has not removed its internal organs. Crab legs generally have a lot of hairs in the legs so easy to have bacteria, followed by crab gills and crab stomach, both of which are inedible, especially crab gills, which contain a lot of dirty things, and the cold nature of the crab stomach is particularly large, so these two can not be eaten.

When we buy crabs, don't be in a hurry to pay the "IQ tax", blindly pursue the place of origin, in the final analysis, the ultimate purpose of crabs is to be eaten by us, thinking about eating hairy crabs in famous lakes and places, but you don't know that it is no longer the hairy crab in your hands, and some are just selling ** under the signboard, which needs to be distinguished by yourself.