Shrimp aunt, commonly known as shrimp crawlers, clams, shrimps, etc. It is affiliated to arthropods, crustaceans, mouths and feet, and shrimps. Shrimps are widely distributed, with delicious meat and rich nutrition, which are highly favored by consumers. With the improvement of people’s living standards, the demand for living shrimp in winter is increasing. However, catching shrimp in the sea in the winter is far from satisfying market needs. In recent years, the author carried out experiments on winter preservation of shrimp plants in the Qinhuangdao area, and achieved good returns. The overwintering technology is introduced as follows. 1 The acquisition of shrimp apricots 1.1 The shrimp selection is to select large individuals, good plumpness, good appendages, no injuries, no disease, strong vitality, bright body color, and sea catch or artificially cultivated shrimp as a winter raising object. 1.2 Acquisition time Northern regions generally choose late October to mid-late November. Buying too early or late will affect its survival rate. 1.3 Transport shrimps are generally transported using aerobic, thermal tanks and water transport. It must be treated with a shrimp septum during transportation. If the water temperature during transportation is in the range of 10 to 15°C and the transportation time is within 3 to 4 hours, the transport volume is generally controlled at 100 kg/m3 of water. 1.4 Into the pond when entering the pool, into the plane network prepared in advance. The size of the net is 2m2m or 2m1m. After the shrimps and shrimps are on the net, healthy individuals will soon walk smoothly and they will not be able to swim away from the net. 2 Overnight management of shrimps 2.1 Overwintering method 2.1.1 Warming over the winter using a boiler. In the existing nursery room, the wintering room, the use of boiler heating overwintering. This method is more common but the cost of wintering is higher. 2.1.2 Use of underground seawater over winter This method can reduce the cost of overwintering and the water quality is stable, but it should be noted whether the water quality can meet the aquaculture requirements and whether the water temperature is appropriate. 2.1.3 Use plastic greenhouses for winter to choose locations where the leeward winds are sunny and where water is easily drained. Cement pools are constructed underground or semi-underground. Cement pool specifications 100 to 200 square meters, depth 1 ~ 1.5m. Using the characteristics of lighting in plastic greenhouses, increase the room temperature and water temperature, and conduct overwintering. 2.1.4 Use of waste heat from the power plant to overwinter winter shrimp 2.2 If the temperature changes frequently during overwintering and the temperature difference is too large during the overwintering period, it will directly affect the feeding of the shrimp and affect the survival rate of the shrimp. It has been proved through practice that the temperature of the shrimp ponds is increased when they enter the pool, and the cooling treatment is carried out after a period of transition, which has a significant effect on raising the survival rate of the shrimps. Specific measures: After entering the pond, the shrimp ponds will be heated to a temperature of 1°C on the basis of the original water temperature, and will be stable for a week when the temperature rises to 15 to 16°C. This will increase the shrimp's vigor and stability, and then reduce the temperature. The temperature was lowered by 0.5°C, and finally it was stable at 10-12°C for wintering. When shrimp shrimps enter the pool, the water temperature changes too frequently and causes the phenomenon of shrimp peeling, which will directly affect the surviving rate of shrimps in winter and should be paid attention to. 2.3 Baits and feeding shrimps are mainly high-protein diets such as fresh mixed fish and mixed shrimps. Large individual diets are typically processed into small 1cm segments and fed. When the water temperature is between 11 and 13°C, the daily food intake of each shrimp is controlled at 2% to 4% of the body weight, which is the best feeding rate for maintaining the nutrients needed for the normal survival of the shrimp. Feed once a day and light up after dark. Feeding should be controlled for a little over the next day. 2.4 Changing the water and clearing the pond The freshwater shrimp should be changed once a day when it is in the pool, with 1 to 2 circulations per day. After the recovery of the shrimp body constitution and the decrease of the mortality rate, the water changes once every other day, and the daily amount is 1 to 2 cycles. During the wintering period, the pond is cleaned once a day and the pool is cleared every other day. Clear pool is usually accompanied by water changes. Remove shrimp and residual baits and clear the feces and sediment in a timely manner to avoid disease. 2.5 Water quality and aerated shrimps normally require uncontaminated fresh sand or clear natural seawater for winter. Normal seawater salinity (about 30 )) had no significant effect on the survival rate of shrimp aphids, but low salinity was not conducive to the feeding of shrimp aphids, which in turn affected the survival rate. The content of ammonia nitrogen is not higher than 0.110E6. The pH is generally controlled at about 8. Shrimp aerators are continuously inflated during the winter. The amount of aeration is generally not large. It is appropriate to use 0.3% of air and microbubble on the surface of the water supply per minute. The amount of dissolved oxygen is 6-8mg/L. 2.6 Stocking capacity and lighting In the premise of water quality, bait, and oxygenation, the stocking capacity is generally controlled at 3 to 5 kg/m3. Illumination has no obvious effect on the survival rate of shrimps in winter, so there is no need to use too much energy for wintering and shading. However, strong light will cause a large number of algae in the pool and be attached to the surface of the shrimp, so the light should not be too strong. At night, fluorescent lighting is generally used. 3 Disease Prevention With the expansion of wintering aquaculture area, the prevention of shrimp disease should be paid attention to. First of all, ensure the conditions of water quality in overwintering pools, increase the amount of water circulation, timely clean the bottom of the pool, remove dead shrimp, and remove the residual baits; secondly, ensure the nutrition and freshness of the bait, regularly add antibiotics and vitamins to the bait, and use externally disinfected drugs. Should also be spilled regularly. Generally after 2 to 3 months of shrimp overwintering management, listed before and after the Spring Festival, the survival rate of up to 70% to 80%. Before and after the Spring Festival, the market price of live shrimp is generally 60-80 yuan / kg, so the overwintering of shrimp has great profit margins.
Fresh Apple
Apple is a common fruit with smooth skin that is usually red, yellow, or green in color. It has a refreshing taste and sweet flavor, and is rich in vitamin C and fiber, which are beneficial for health. Apples can be eaten raw or used to make various delicious juices, jams, and desserts. When choosing fresh apples, look for fruits with no obvious flaws, smooth and shiny skin. For storage, it is best to keep them in a cool, ventilated place away from direct sunlight and high temperatures. Fresh apples are a healthy and delicious fruit that is suitable as part of a daily diet.
Guofu Technology Group Co., Ltd , https://www.guofufarm.com