Nitrogen fertilizer fish technology points and matters needing attention

Although nitrogen fertilizers have high nitrogen content, they contain only a single component and are incomplete fertilizers. Phosphorus and potassium fertilizers should be mixed. The ratio is 2:2:1. Ponds with more silt may not use potassium fertilizer. (2) Before applying nitrogen fertilizer, it is best to apply organic fertilizer as base fertilizer, and nitrogen fertilizer is suitable for top dressing. The main targets of application were filter-feeding fish such as cockroaches and cockroaches, followed by omnivorous fish such as cockroaches and cockroaches, and herbivorous fish had poor application effects. (3) The application of nitrogen fertilizer should not be mixed with quicklime, plant ash and other alkaline fertilizers. When the pH of the pool water is above 8.3, nitrogen fertilizer should also be stopped. (4) The application of nitrogen fertilizer except ammonia, the other should be dissolved in water first, then Quanchiposa, generally once a week fertilization. 100 square meters of water usage: a pond with a depth of about 1 meter, 0.75 kg each time is appropriate. Large and medium-sized reservoirs should be selected for fertilization in shallow water areas in the upstream reservoir bays and lakes, and fertilization sites should be kept as far away as possible from spillways or sluice gates to avoid loss of fertilizer and water.

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