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Fertilizing time is usually topped with chemical fertilizers at 5 to 6 pm.
Fertilize fish ponds with a depth of about 1m, applying 1.5-2kg of urea per mu, and 2.5-3kg of phosphate fertilizer. The effect of single application of ammonia fertilizer or phosphate fertilizer is not good. For fish ponds or reservoirs with water depth of 2m or more, per acre The amount should be increased appropriately.
The fertilization sequence first dissolves the phosphate fertilizer with water, and then dissolves the ammonia fertilizer in this solution. The ammonia fertilizer can only be fully dissolved before pouring into the water. Never directly spread the ammonia fertilizer (such as urea) into the fish pond.
Pay attention to splash evenly to evenly distribute spilled 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.
Frequent fertilizer application is a fast-acting fertilizer. When fertilizing, it should be done as small as possible, preferably every 4 to 6 days.
Observe that after applying chemical fertilizers in fish ponds, always observe the changes in the color of the pond waters and the activities of the fishes. If any abnormalities are found, timely measures should be taken to remove the fertilizer, add new water, and increase the water level.
Retaining the plant stems within the spiral sections, allows secure support without restriction. This gives the plant freedom of movement and encourages air circulation, helping to prevent fungal diseases and promoting strong stem growth. Supporting "Asters to Zinnias" has never been so easy!
Appropriate topdressing of fertilizers in fish ponds will allow plankton to 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.