Fish compound fertilizer has good effect when used above 15°C. It is generally used as topdressing fertilizer. It can be used as base fertilizer in areas where there is no fertilizer and less fertilizer. If it is used with organic fertilizer, the effect is better, and the annual amount of water per mu is 60- 80 kg. In the pool water using fish compound fertilizer, the plankton biomass is generally in the range of 20-50 mg/L. The dominant population is mostly found in green algae, eutrophic algae, diatoms and cryptophytes. There are generally three ways to use:
First, splash method
After the fertilizer is dissolved in water, the whole pool is sprayed evenly. The dosage is 1-2 kg per mu, once every 3 days, or 4-5 kg ​​per mu, and once every 10-15 days.
Second, spray method
Mainly used for large bodies of water, the dissolved fish is put into the shiphouse with compound fertilizer, and then mechanical spraying is used, and the amount is the same as the sprinkling method.
Third, bagging method
When used, the compound fertilizer is put into a bag, a pot or a buoyant porous releaser and suspended in the upper layer of water, with a capacity of 2-3.5 kg, and 2 buoyant porous releasers per acre of ponds are released for 10-15 days. After entering, the container is replaced with new fertilizer and used again. It can also be used in combination with splashing and hanging bags. In the case of greater transparency of the pool water, it should be splashed with water first. When the transparency is 22-30 cm, the bag hanging method can be used to maintain the stability and lasting color of the water.
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