1 Improve water quality environment The growth and fattening of hairy crabs are inseparable from water, and pond water quality has a great influence on the growth of hairy crabs. In autumn, the water temperature gradually decreases. The crab pool should maintain a water depth of 1.2 meters and a transparency of 35 to 40 centimeters. When the transparency is less than 25 centimeters, it is necessary to drain the old water at the bottom and inject new water. When changing the water, be careful not to make the water temperature in the pond more fluctuate. In order to prevent the crabs from generating a large stress response, the immunity is reduced and the illness may be caused. Vital vitamin C, improve the body's anti-stress. After water injection, microbiological preparations or sediment modifiers can be used to change the color and quality of the water to make the water clear and green. Microbial preparations are generally used once every 10 days and end at the end of October. Degradation can effectively remove the reduced substances at the bottom of the pond, reduce the oxygen consumption at the bottom, and provide sufficient guarantee for the dissolved oxygen in the whole pond. At the same time as changing the bottom, oxygen tablets can be added to increase the weight of fattening crabs. If there is a phenomenon of black floor in Tangkou, a large amount of bottom water can be used first, and then use powerful bottom net or full-effect bottom reform for 2 to 3 times to improve the phenomenon of black floor of hairy crabs. Hairy crabs will decline in physical fitness after high temperature in summer, and will face the last shell in one month before listing. The new shell of the old shell has not yet hardened and is vulnerable to parasitic infections. At this time, shrimp shells should be selected. The non-irritating biological disinfectant controls the amount of harmful bacteria in the water and ensures that the crabs can be shelled. 2 Science feeding feed Hairy crabs are a kind of reclusive organisms. Water plants can provide room for hairy crabs to avoid predators. At this time, they should pay attention to protecting aquatic plants. For ponds with a good environment and no water grass, consider transplanting Elodea in other ponds or transplanting a large amount of water peanuts into the pond to ensure the amount of aquatic plants. Transplanting should be evenly distributed to facilitate the attachment of hairy crabs and timely use appropriate drugs to maintain vitality of aquatic plants. Autumn is the best time to increase the fatness and absolute weight of hairy crabs. Therefore, the proportion of concentrated feed should be increased in feeds, and the protein content must be increased to about 32%, and feed nutrition must be comprehensive. To reduce the cost of self-made compound feed, but we must pay attention to the addition of vitamins and minerals, as well as the balance of amino acids in protein, can be added in the feed for aquatic production of vitamin C and E, Han Bao multi-dimensional, Han Bao speed, etc., These preparations can meet the demand for vitamins and minerals of hairy crabs, thereby enhancing the immune and disease resistance of hairy crabs. The daily feeding amount should be controlled flexibly according to the weather and the feeding conditions of the crabs. It is advisable to eat just enough to eat, and must not feed more and corrupt the water quality. Hairy crabs need nutrients higher than usual during the fattening period, and can be replaced with high-protein diets, and then spilled gold polysaccharides and anti-kindling, improve physical anti-stress, promote the success rate of clam shell. Ice fish contains high protein, which is fed into ice fish and then sterilized with super iodine before feeding. If the crabs are not fed, it is easy to cause bacterial infection. Regular disinfection work should be done to prevent enteritis. 3 Timely calcium supplement Hairy crabs are crustaceans, and more than 90% of their body shells are composed of calcium. During the growth process, they need to absorb large amounts of minerals (calcium, iron, phosphorus, magnesium, etc.) from water bodies. A single use of quicklime or calcium dihydrogen phosphate (with poor solubility and low effective calcium content in the water) cannot meet the needs of hairy crabs for minerals and other trace elements. Due to the low calcium content in the pond, the problem of hairy crab shells occur from time to time. The calcium content below 25% in the water body can easily cause the shell to fail, and it can also affect the doubling rate of the oyster shell. Therefore, timely calcium supplementation during the fattening period is particularly suitable. important. The calcium supplement can be splashed with "green hydrolyzed toxin", "oxygenation and detoxification" to detoxify and increase oxygen, splashing "oligosaccharide 863" and "vitamin C" to enhance the vitality of hairy crabs, splashing "calcium plus calcium" and "bioactive calcium supplements". "," Vitamin C supplement calcium, magnesium, phosphorus. When hairy crabs are clam shelled, they are fed in small quantities or even stopped. After the feed is resumed, “probiotics producing enzymes†and “speed-adjusting†can be added to the feed. Calcitonin can effectively increase the calcium content of water and contain the mineral salts needed for the growth of crab shells. It can quickly supplement and maintain the needs of the growth of crab shells and mineral salts and various trace elements. It can prevent the crabs from licking shells and can quickly make the crabs shells. hardening. Calcium can be supplemented once every 10 days, and it can be supplemented scientifically and reasonably 2 to 4 times according to the length of the shell. It can be clearly seen that the shell's gloss and hardness increase, such as the use of gold polysaccharides with better results. Since the last shell cycle before being listed for fattening is up to one month, it is recommended to use one week or so for regular calcium supplementation. If it lasts for three to four weeks, the success rate and doubling rate of hairy crab shells can be increased. Regularly use "Oxygen-enhanced detoxification" or "six-control bottom health" Quanchiposa to improve the sediment environment, regular use of "ion calcium + shrimp and crab multi-dimensional" spices internal treatment, a course of treatment for 3 to 5 days. Two to three days before each oyster shell, use "immunopolysaccharide + shrimp and crab multidimensional + ion to calcium" spices, supplement energy nutrition and calcium, to ensure that part of the hard shell oyster shell crab smooth oyster shell, the whole pool crab can be synchronized growth . After the peak of the oyster shell, use "super-ion calcium" or "calcium gluconate" Quanchiposa to supplement enough calcium energy to ensure the healthy growth of hairy crabs. Regular use of quicklime can be dissolved into water. Quanchiposa can also be used to put in snails, etc. Calcium can also be added. When adding fertilizer, some calcium or calcium dihydrogen phosphate can be added. Use 5 kg of calcium dihydrogen phosphate for 1 meter per acre of water to supplement the body of water. The nutrients needed can promote the rapid propagation of algae when fertilizer and water are used. Calcium plus calcium, ionized calcium and biologically active calcium supplements are used in calcium supplementation. They are used in the first 10 days of the crab shell and have the best results. Hairy crabs are delicious, nutritious, and rich in high-quality proteins that help promote the repair and synthesis of human tissue cells and improve immune function. Autumn is the best time for the development of hairy crabs. In order to improve the quality and efficiency of hairy crabs, it is necessary to strengthen daily management, increase nutrition, and scientifically feed them, so that the crabs can be fat and strong. In this issue, we will introduce a group of hairy crab rearing fattening techniques for farmers' reference. 4 Strengthen disease prevention and control The prevention and control of the hairy crab disease should adhere to the principle of "prevention first, prevention and control combined", and prevention methods combining oral administration with external use can be adopted. In the feeding of compound feeds, internal medicines are added to feed, and the use of biological preparations for feeding is indiscriminate. The prevention effect is good. Monthly hamburger garlic can be added to the feed for feeding and feeding, and it can be fed for 3 to 5 days. Hairy crabs grow well. Ponds should be regularly sprinkled with quicklime to disinfect and sterilize every 10 to 15 days to prevent diseases. Frequent use of bromochloroheine or dibromohydantoin on Quanchiposa can also strengthen disease prevention and treatment; if sudden changes in temperature, trace elements should be applied. Spilled vitamin C throughout, can effectively solve the stress problem. Internal medicine can eliminate some of the diseases such as enteritis and black lice, and some internal medicines (hepatobiliary, high stability, western, dinocan, etc.) and nutrient additives (life elements, gold polysaccharides, etc.) can be added in due course. Or once a month before the listing of insecticide, disinfection can also effectively prevent black worms, edema, rot shell and other diseases, while improving the crab shell crust gloss. Due to various reasons such as water quality and nutrition, hairy crabs are prone to crustaceanism or death without clams. Prevent this disease can be added in the feed fast calcium supplement calcium, fast hard shell promote clam shell. In addition to strengthening the hairy crab's own constitution through daily oral administration, it is also important to ensure the culture environment. The last shell is often the pond environment is poor when the water rot, cyanobacteria die, heat fermentation of the substrate, lack of oxygen, bacteria and other factors cause a large number of harmful bacteria. In the pupal period, the constitution is weak, and the pathogenic bacteria enter the disease, leading to the occurrence of diseases such as gills, scorpions, and edema. Deterioration of water quality makes it easier to breed ciliates. In addition to good water quality regulation, ciliates need to be killed, and the use of "fibril nets" in Quanchiposa results in good results. Fingerprint Safe Box,Residential Safe,Biometric Safe Box,Steel Safe Box Hebei Yingbo Safe Boxes Co.,Ltd , https://www.yingbosafes.com