Can fish use fertilizer? How to add fish fertilizer to pond fish?

The application of chemical fertilizers in fishponds is to use the nutrients in the fertilizer to cultivate algae in the water, and to provide abundant bait for filter-feeding fish such as crickets and crickets. The water temperature rises from June to September every year. It is the golden season for fish growth. The consumption of nitrogen in the water is large. At this time, using fertilizer as top dressing can prevent the water quality from deteriorating, and does not consume dissolved oxygen in the water. Green, can create good ecological conditions for fish.

Reducing the occurrence of fish diseases can greatly increase the fish production. Generally, 4 kg of chemical fertilizer per mu of fish ponds (40% of ammonium bicarbonate, calcium magnesium phosphate, 20% of potassium chloride), and 1 kg of carp and carp can be increased. . The cost of fertilizer is about 2.5 yuan, the output value of fresh fish is about 5 yuan, and the input-output ratio is 1:2. The economic benefits are considerable. The main technical introductions of fish farming and fertilizer application are as follows.

1. Apply chemical fertilizer at the right time and in the right amount: from June to July and from September to October, the water temperature is between 20 and 30 °C, and it is better to apply fertilizer at 8 to 10 am on a sunny day. The effect of applying fertilizer on a rainy day is poor and should not be carried out. The application of chemical fertilizers should be carried out according to the water quality, with less water and fertilizer, and more water and thinner.

In the application of fertilization, a small number of methods should be adopted. One application should not be excessive. Generally, 7.5 kg of chemical fertilizer is applied per mu for the first time, and once every other week, 4 kg of chemical fertilizer is applied each time. In the early stage, only ammonium bicarbonate, calcium magnesium phosphate should be applied, and the ratio is half. Late application of ammonium bicarbonate, calcium magnesium phosphate, potassium chloride, the ratio of 4:4:20 If the pH value exceeds 7.5, the water body transparency is less than 40 cm, then stop applying nitrogen fertilizer to avoid fish poisoning.

2. Fertilization method: When fertilizing, first put the fertilizer into the bucket and dissolve it with water and stir it evenly before splashing the whole pool. Phosphate fertilizer should be applied first, then nitrogen fertilizer should be applied, phosphorus and nitrogen should not be applied at the same time, and the order cannot be reversed. If it is carried out at the same time, it will produce toxic and non-fertilizing metaphosphoric acid. It should also be noted that when applying nitrogen fertilizer, it should not be mixed with quicklime, grass ash or other alkaline fertilizers to avoid reducing fertilizer efficiency. In addition, it is not possible to directly apply solid fertilizer to the water, otherwise it will not only have poor effect, but also fish are susceptible to poisoning.

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