The method of cultivating crabs by aquatic EM bacteria;
1. Water splashing method: use EM bacteria from Yifuyuan 1 kg per mu and add the same amount of brown sugar. Dissolve brown sugar with warm boiled water, then add a small amount of water, adjust the water temperature to 30-40 degrees, then pour it into the bacterial liquid for sealed fermentation for 2 hours, then dilute it 200-500 times and sprinkle it around the whole pond, or directly sprinkle it on the water surface of the fish pond after diluting it with EM bacteria from Yifuyuan.
2. Feed soaking method: feed fresh fish and other animal feeds with aquatic EM bacteria accounting for 1% of feed consumption; Feeding granular materials, adding 2% aquatic EM bacteria, diluting and spraying on the granular materials; Feed soybean, bean cypress, wheat, corn and other raw materials, and add 3-4% aquatic EM bacteria stock solution. You can also add the same amount of brown sugar to soak in water, seal it 16-24 hours, and feed it. Pond water that can be soaked in feed does not need to be sprinkled with Yi Fuyuan EM bacterial liquid. The feed soaked by Yi Fuyuan EM bacteria is acidic, which is loved by fish, shrimp, crab and clam, and is easy to digest and absorb after eating. Practice has proved that Toshiba feed soaked by Yi Fuyuan EM bacteria can keep no flowering or deterioration for 5-7 days even if it is put into water in high temperature weather in summer, which greatly reduces feed waste and water pollution.
1, soaking seedlings
The traditional method is to soak the seedlings with salt or potassium permanganate. Now many farmers soak crab seedlings with Yifuyuan biological stock solution before stocking.
The specific method is as follows: add 1000 ml biological stock solution into 250 kg water, inflate it with an inflatable oxygen pump, and then soak the crab seedlings in water for a period of time.
For 20 ~ 30 minutes, let the crab seedlings move freely in the water with aerobic feet and fungus rape, absorb water and spit out harmful substances in the body. This can greatly reduce the crab's
The first and second molting deaths. According to experimental statistics, the mortality rate of crab seedlings is reduced by 30% ~ 40%.
Second, soaking and mixing feed
In the process of high-yield and high-efficiency river crab culture, the daily feed mainly includes fresh small fish, frozen marine fish and granular feed, especially fresh small fish and frozen.
Marine fish contains a lot of bacteria, which is easy to cause enteritis of river crabs and pollute water quality. In aquaculture, on the one hand, we adjust the feed structure, on the other hand,
The combined use of Yifuyuan biological stock solution, the specific method is as follows: 100 ml Yifuyuan biological stock solution and 1500 ml water are evenly sprayed on 100 kg pellet feed.
Stuffed for 2 hours before feeding. If fresh fish or frozen marine fish are fed, use 100 ml of Yifuyuan biological stock solution after slicing every 100 kg of fresh fish or frozen marine fish.
Stir well, soak for 3 hours and then feed. This can obviously reduce the incidence of enteritis in river crabs and cause less pollution to water bodies.
Third, water quality supervision.
In the process of raising crabs, in May every year, the temperature rises, the moss begins to die, the pool water gradually thickens, and the water color becomes muddy, which affects the photosynthesis of aquatic plants.
Function, serious failure will occur. At this time, 100g chlorine dioxide should be sprayed in the whole pond for water disinfection, and then 500 ml chemical water should be sprayed in the whole pond every 15 ~ 20 days, so that beneficial populations in the pond can form advantages, increase the transparency of the water body, and form fresh, lively, tender and refreshing.
High-quality aquaculture water can make the photosynthesis of aquatic plants normal, improve their ability to purify water, and ensure the smooth progress of crab culture. After applying Yifuyuan biological stock solution, Eriocheir sinensis has strong disease resistance, rapid weight gain, large size, good quality and remarkable economic benefits, with an increase of about 30% and 20% ~ 30%.