Six points for fish rearing chemical fertilizers

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Fish rearing fertilizer to fishponds can make plankton grow well. Phytoplankton absorbs nutrients and ammonium salts and produces oxygen through photosynthesis, which can increase natural foods and improve water quality. It is an effective method to increase the yield of fish farming.

First, fertilization time. Generally from 17 to 18 o'clock is good.

Second, the amount of fertilization. Depth of water is about 1 meter ponds, urea 1.5 kg ~ 2 kg per acre. Phosphorus fertilizer from 2.5 kg to 3 kg, the effect of single application of ammonia fertilizer or phosphate fertilizer is not good. For fish ponds or reservoirs with water depths of more than 2 meters, the amount of fertilizer per acre is appropriately increased.

Third, fertilization should be carried out in strict accordance with the order. That is, first dissolve the phosphate fertilizer with water, and then dissolve the ammonia fertilizer in the phosphate fertilizer water. Before the ammonia fertilizer is fully dissolved, it can be poured into the water. Never directly spread the ammonia fertilizer (such as urea) into the fish pond.

Fourth, pay attention to sprinkler water points. Fish ponds should be distributed evenly sprinkle fertilizer points. In addition, the use of chemical fertilizers in deep water must be avoided. This is due to the fact that there is a large amount of pond soil mixed with deep water, and the ammonium ions of ammonia fertilizers are easily adsorbed and fixed to lose fertilizer efficiency.

Fifth, the appropriate number of fertilization. Fertilizers are quick-acting fertilizers. When applying fertilization, try to do as little as possible, and it is best to apply it once every 4 days to 6 days.

6, pay attention to observe after fertilization. After chemical fertilizers are applied in fish ponds, attention should be paid to observing the changes in the color of the pond water and the activities of the fish. If there are any abnormalities, timely measures should be taken to remove the fertilizer, add new water, and increase the water level.

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