The use of biogas fertilizer fish has the advantages of high fertilizer efficiency, low oxygen consumption, fast breeding of plankton, rapid fish growth, fewer fish diseases, no fish smell, low cost, and easy operation.
To master the time of high biogas fertilizer efficiency: Generally speaking, after a large refueling of the biogas digester, after one month, the available nitrogen and phosphorus contained in the biogas fertilizer peaked. Applying biogas fertilizers to fish ponds at this time can bring maximum benefits.
The fertilizer residue of biogas fertilizer is used as the base fertilizer, and the fertilizer and water are used as top dressings: the biogas fertilizer is a quick-acting fertilizer, and the principle of “less quantity and more times†should be mastered in application. It is generally applied once a day. If the weather is hot and the transparency of the water is below 25 cm, it should be applied once a day or several days.
The area of ​​fish ponds and biogas digesters should be matched: the area ratio of fish ponds and biogas digesters should be 100:0.2-0.3. Divide several biogas digesters so that they can be used interchangeably to avoid excess fish ponds or surplus of biogas fertilizers.
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