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Spring pond fertilizer difficulties and countermeasures
The phenomenon of poor fertilizer and water is prone to occur in the fertilizer and water work after disinfection of ponds in the clear pond every year. This not only increases the cost of pond cultivation, but also causes labor waste, and it also affects the progress of the next production of the pond. The difficulties and countermeasures for spring fertility work are analyzed as follows: 1. The aquaculture water body lacks nutrients and lacks various nutrients needed for algae growth. These issues are prone to occur in Xintangkou and Tangkou where no basal fertilizer is applied, and in the use of very thin water. At this time, the basal fertilizer should be topdressed in time or biological agents beneficial to the growth of algae should be used to cultivate planktonic algae. Secondly, during the clear pond process, excessive or excessive disinfectant was used, resulting in a slower process of fertilizer and water. At the same time, the newly-excavated paddy field cultivation is difficult to use due to the annual use of pesticides. The reason is that more toxic residues of drugs are not conducive to the growth and reproduction of algae. At this point, detoxification biological agents should be used first, together with anti-stress drugs, to eliminate toxicity and promote algal reproduction. Third, the moss in the bottom of the pond will also inhibit the reproduction of planktonic algae. The method is to increase the water level in the pond, remove it manually, and use the modified biological preparation. Recruit fertilizer or use biological fertilizer. Fourth, the continued emergence of a large number of zooplankton is also another important factor affecting the growth of algae. Note that no drugs can be used to kill zooplankton at this time, nor can fertilization and algae cultivation be used to cultivate planktonic algae. The countermeasures are to enhance oxygenation of water bodies, feed feeds in sufficient quantities, and use biological reforming agents. After the zooplankton breeds to the point where there is no food death, it is followed by top-dressing and the use of a two-pronged method to quickly replenish pond algae.
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