Fish farming can properly apply fertilizer to fish ponds, which can make plankton grow well. The absorption of nutrients and ammonium salts by phytoplankton and the production of oxygen through photosynthesis can not only increase natural bait but also improve water quality. It is an effective method to promote fish production. The following six points should be applied to apply fertilizer:
First, the time of fertilization. Generally it is good at 17 o'clock to 18 o'clock.
Second, the amount of fertilization. Fish ponds with a water depth of about 1 meter apply 1.5 kg to 2 kg per mu. Phosphate fertilizer is 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 above 2 meters, the amount 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, then dissolve the ammonia fertilizer in the phosphate fertilizer water. After the ammonia fertilizer is fully dissolved, it can be poured into the water. It is forbidden to directly dry the ammonia fertilizer (such as urea) into the fish pond.
Fourth, pay attention to the sprinkling water point. The fish pond should be evenly distributed to splash the fertilizer water. In addition, deep water avoids the application of chemical fertilizers. This is because there are many pond soils mixed in deep water, and the ammonia ions of ammonia fertilizer are easily adsorbed and fixed, which loses fertilizer efficiency.
5. The appropriate number of fertilizations. Fertilizer is a quick-acting fertilizer. When applying fertilizer, try to do as few times as possible, preferably every 4 days to 6 days.
6. Pay attention to observation after fertilization. After applying chemical fertilizer in the fish pond, it is necessary to pay attention to observe the color change of the pond water and the activity of the fish at any time. If there is any abnormality, it is necessary to take timely measures such as removing the fertilizer water, adding new water, and raising the water level.
First, the time of fertilization. Generally it is good at 17 o'clock to 18 o'clock.
Second, the amount of fertilization. Fish ponds with a water depth of about 1 meter apply 1.5 kg to 2 kg per mu. Phosphate fertilizer is 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 above 2 meters, the amount 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, then dissolve the ammonia fertilizer in the phosphate fertilizer water. After the ammonia fertilizer is fully dissolved, it can be poured into the water. It is forbidden to directly dry the ammonia fertilizer (such as urea) into the fish pond.
Fourth, pay attention to the sprinkling water point. The fish pond should be evenly distributed to splash the fertilizer water. In addition, deep water avoids the application of chemical fertilizers. This is because there are many pond soils mixed in deep water, and the ammonia ions of ammonia fertilizer are easily adsorbed and fixed, which loses fertilizer efficiency.
5. The appropriate number of fertilizations. Fertilizer is a quick-acting fertilizer. When applying fertilizer, try to do as few times as possible, preferably every 4 days to 6 days.
6. Pay attention to observation after fertilization. After applying chemical fertilizer in the fish pond, it is necessary to pay attention to observe the color change of the pond water and the activity of the fish at any time. If there is any abnormality, it is necessary to take timely measures such as removing the fertilizer water, adding new water, and raising the water level.
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