In recent years, many farmers in the Dianshanhu Town of Kunshan City have experienced low yields and small sizes of shrimp during the mixed culture of shrimps and crabs, especially in the first half of the year. After many years of practice in the agricultural service center of Dianshanhu Town, Kunshan City, the reasons for the low yield of spring shrimp in the shrimp and crab mixed pools were identified and corresponding countermeasures were proposed. Reasons (1) Most of the shrimps in the shrimp, crab, and crab mixed pools of farmers are self-propitious and their inbred breeding results in germplasm degradation. (2) Poor water quality in the external environment, unreasonable structure of aquatic plants, improper feeding of feed, and lack of oxygen in Tangkou directly affect the yield and specifications of the shrimp. (3) In the early spring of shrimp and crab mixed ponds, large amounts of moss or blue-green algae breed too quickly. After chemical drugs are used, the stress on the shrimps is greater and even causes death. Countermeasures (1) Purify and rejuvenate the germplasm of the green prawn, collect wild high-quality prawn such as lakes and rivers for seedling propagation. (2) Thoroughly clearing the pond, 200 grams of chlorine dioxide is used to disinfect Mu in ponds after entering the water, and 200 grams of amino acids are detoxified after 3 days. When mussels are used, 150 grams of vitamin C are added to increase the immunity of shrimps. Survival rate. (3) Reasonable fertilization, 200 kg of fermented organic fertilizer used in Xintang Mu as base fertilizer, 100 mu of organic fertilizer used in old pond Mu as base fertilizer, and 1 kg of amino acid fertilizer and 20 mu of EM bacteria per acre after releasing seedlings, Baote The algae and bacteria in the water are flat, improving the nutrition of the water body. (4) When the moss appears in the pond, biological control methods are adopted. The proportion of calcium and phosphorus in the feed is appropriately increased to promote the clam shell of the shrimp, and the organic fertilizer and water are applied in the whole pool in time, and the amino acid water transfer is used in combination to control the over-breeding of moss, cyanobacteria, and the like. Chemical moss drug. (5) Feed special feeds for crabs and shrimps, and add feed additives with the function of preventing enteritis in a timely manner. In severe weather, Quanchiposa vitamin C, improve the anti-stress ability of shrimp. (6) Diligently open the aerator to ensure the required dissolved oxygen for the growth of the shrimp. (7) Proper planting of aquatic plants in ponds is preferable to compound aquatic plants. The area of ​​aquatic plants accounts for about 50% of the total pond area. In the case of polyculture of shrimps and crabs, modern technologies such as bio-additives, microecological preparations, and micropore oxygenation should be used in combination to maintain the balanced nutrition of shrimps and crabs and the balance of bacteria and algae in the water, and to minimize or eliminate the use of chemical drugs. Anti oxidation, has the function of delaying aging and resisting fatigue, Astaxanthin can significantly reduce the ROS and NMP on the dermal layer of collagen, elastin damage, to ensure the normal metabolism of the skin, Ginkgo biloba extract can directly eliminate lipid free radicals, lipid peroxidation free radicals and alkyl radicals, and terminate the free radical chain reaction chain.Panax ginseng can be formulated into freckle, reduce wrinkles, activate skin cells, enhance skin elasticity of cosmetics. Health Care Antioxidant Supplement,Health Antioxidant Ingredients,Healthcare Antioxidant Raw Material,Health Care Xi'an Natural Field Bio-Technique Co., Ltd. , https://www.naturalnf.com