Application of Photosynthetic Bacteria in Aquaculture Production
Dental Wedge,Teeth Wedge,Teeth Wedges Catheters And Tubes Co., Ltd. , http://www.cnmedicalinstrument.com
Photosynthetic bacteria (hereinafter referred to as PSB) have the function of improving water quality and promoting the metabolism of aquatic animals. They can be directly used as food and bait additives for aquatic animals, and are therefore increasingly valued by fishery workers. In order to facilitate the use of aquaculturists in production, the author introduces the use of PSB in aquaculture production as follows. First, in shrimp culture before stocking shrimp, 1 kg of PSB per acre is evenly thrown into the sediment, splashed in the pool of black mud more recesses, dead bottom; then 5% per day thereafter The PSB is evenly sprayed on the compounded bait and fed 2 to 3 times daily. Results The ammonia nitrogen content of the test pool was 0.4 mg/l lower than that of the control pool, and the dissolved oxygen content in the pool water was increased by 1.2 mg/l, the yield was increased by 38.5%, and the economic benefit was very significant. Second, in the production of adult crabs, especially in July-August, every 5 days Quanchiposa a 5ppm PSB, can effectively reduce the content of ammonia in water, improve water quality, and can significantly improve the body color of adult crabs, The color quality of crabs is close to that of natural crabs. In addition, it can also accelerate the growth of crabs and shorten the breeding cycle. Third, the application of photosynthetic bacteria to ornamental fish in parks and aquariums can also improve the hatching rate and promote growth. The method is to periodically add 3 to 5 ppm of PSB to the water during the hatching and breeding of ornamental fish, and it is also possible to add about 5% of PSB to the daily feed. IV. Ponds with mixed fishes and crabs, focusing on a 4 ppm PSB in July-August and adding 5% of PSB to the daily feeds. After three months of feeding, the fish production per hectare is generally 8500 ~ 10000 kg, producing more than 225 kg of crabs, only crabs increase net income per hectare is generally more than 7,500 yuan. 5. In the hatching process of fish fertilized eggs (such as grass carp, herring, carp, carp, goldfish, etc.), 10 to 20 ppm of PSB is regularly added to the hatching water, and the hatching rate of fish fertilized eggs can be increased by 10 to 20 %. 6. During the fry-to-summer flowering process, 5ppm of PSB should be spilled on the day before stocking, which will speed up the growth of the fry and increase the survival rate. VII. In the breeding process of summer flower breeding, in the months of July and August, each pool of 4ppm of PSB is spilled, and 6% of PSB is added to the daily feed of the concentrate, after 3 months of breeding. To grow large-sized fingerlings with an average body length of 12cm, increase the yield of 13kg per mu, increase the survival rate by more than 20%, and have the obvious effect of saving production costs. 8. The use of 3 to 4 5ppm PSB Quanchiposa in high-density culture of Penaeus vannamei can significantly improve the water quality. After testing, the amount of dissolved oxygen in the pool increases, and the time to start the aerator can be reduced, and the amount of water exchange can be reduced. No shrimp floating phenomenon was found, and the yield of shrimp was increased by 39%. The best yield and best efficiency were achieved in the cultivation of white shrimp in South America, Zhanhua County, Shandong. In summary, all photosynthetic bacteria currently used in aquaculture are mixed strains of Pseudomonas spp. whose bacterial concentration is 2 to 5 billion/ml. The main functions and methods of use are: (1) To improve aquaculture water quality, Quanchipid Sprinkling method is used, and the dosage is 5 to 10 ppm, which is used regularly or irregularly; (2) It is used as a bait additive, and the PSB is generally uniformly mixed into the fed concentrate to be continuously fed, and the dosage is feed. The amount of 5% or so; (3) At the same time can eliminate the bottom of the pool of pollution, generally per acre with 1 ~ 1.5 kg of PSB evenly mixed in the sediment, the focus of the more scattered into the bottom of the pool. The combination of the above three methods, the effect is even more.