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Fertilizer fishery has high benefits
Fertilizer fishery benefits High-fertilizer fish farming has the advantages of convenient transportation, simple application, no consumption of oxygen in water, no pollution of water bodies, quick results and high benefits. Under normal circumstances, the application of urea 1 kilogram, can be grown into 1.5 kilograms of fish; ammonium sulfate 1 kilogram, can be grown into fish 0.5 to 0.7 kilograms; Ammonium phosphate 1 kilogram, can be grown into fish 0.5 to 0.6 kilograms; ammonia water 1 kilogram Can grow fish 0.1 kg. First, the application of nitrogen fertilizer Note 1 nitrogen fertilizer although high nitrogen content, but a single component, is incomplete fertilizer, should be mixed with phosphorus, potassium fertilizer, the ratio of 2:2:1. Ponds with more silt may not use potassium fertilizer. Before applying nitrogen fertilizer, it is best to apply organic fertilizer as base fertilizer. Nitrogen fertilizers are suitable for top dressing. 3? Application of fertilizer in addition to ammonia, the other should be dissolved in water, then Quanchiposa. Fertilize once a week in general. 100 square meters of water usage: a pond with a depth of about 1 meter is appropriate for 0.75 kilograms each; large and medium-sized reservoirs should be selected for fertilizing in the shallow waters of the upstream bay and lake forks. The fertilization site should be as far away as possible from spillways or sluice gates to avoid loss of fertilizer and water. 4) The target species were mainly Filter-feeding fish such as cockroaches and cockroaches, followed by omnivorous fish such as cockroaches and cockroaches, and herbivorous fish had poor application effects. 5. Never use nitrogen fertilizer with lime, ash and other alkaline fertilizers. The application of nitrogen fertilizer should also be stopped when the pH of the pool water is above 8?3. Second, the application of phosphate pay attention to problem 1? depending on the status of the water to determine the amount of application: fish ponds increased by 15%, ditch, canal, lakes, 20% increase to lighten the water after application (transparency 25 to 30 cm), with yellow green or Brown green is better. 2 The choice of phosphate fertilizers should be appropriate: the use of superphosphate is wider and the effect is better; followed by calcium magnesium phosphate fertilizer; phosphate rock powder is of poor efficiency. 3? The proportion should be reasonable: the proportion of superphosphate and urea is 1:1, and some old fish ponds with more organic matter and yellow ponds with sandy ponds can be increased to 2:1. Other nitrogen fertilizers are converted into urea according to their nitrogen content, which is reasonably calculated. 4? Appropriate casting time: June-September is the best season. Every day chooses between 8 and 9 am, about 150 grams per 100 square meters of water. 10 days is a cycle, and another cycle is followed by a cycle of two weeks. 5? Fertilization method should pay attention to: Under normal circumstances, should be mixed with organic fertilizer or other nitrogen fertilizer application. When mixing with nitrogen fertilizer, apply phosphate fertilizer first and apply nitrogen fertilizer later. Do not invert it so as not to cause dead fish. When applying alone, it is best to dissolve the phosphate fertilizer first and spray it on the surface of the water with a sprayer or spray it evenly. It is also possible to use a bag of phosphate fertilizer and hang it on a fixed stake in the water. No matter which kind of phosphate fertilizer, it can't be mixed with quicklime and plant-wood ash. For the alkaloid culture water, little or no lime should be used.