Fish The water quality of the fish pond is light, the dissolved oxygen in the water is high, and the fish is not prone to hypoxia and floating head; Oxygen floating head, there is even the danger of flooding the pond with dead fish. Therefore, it is necessary to adjust through artificial measures, cultivate fertilizer and water, and adjust dissolved oxygen. The standard of good water quality is: fat, live, tender and cool. The water quality adjustment measures for fish ponds throughout the year are now introduced as follows:

1. Pet.com introduced that four seasons fertilization (organic fertilizer) regulates water quality. The organic fertilizer produces a large amount of nutrients through bacterial decomposition, which is conducive to the mass reproduction of plankton, which is conducive to the proliferation of plankton. Fish provide abundant feed.

1. Sufficient base fertilizer in winter. In winter, the water temperature is low, the dissolved oxygen is high, and the oxygen consumption is low. At this time, a large amount of basal fertilizer is applied, and after a long time of decomposition, there will be no sharp decrease in oxygen. When the water temperature rises in spring, the water quality becomes thicker, and the feed organisms in the pool will multiply, which is conducive to the growth of fish. The method is to use a small amount and a large amount of fertilizer. The amount of fertilizer applied accounts for about 40% of the year. Generally, about 750 kg per mu of fish pond is applied.

2. Fertilizer supplement in spring. From March to May, plankton has proliferated in large numbers, and fish feeding has increased significantly. It is about to enter the peak period of plankton reproduction. At this time, supplementary fertilizer should be applied. .

3. Fertilizer control in summer. From June to August, it is in the high temperature season, which is the period when the feeding amount is the largest, and the oxygen consumption is large. Generally, high-yield ponds are basically not fertilized. The water quality is indeed relatively light, and the amount of fertilization is less and less, and the amount of fertilization accounts for about 10% of the total.

4. Fertilize frequently in autumn. From September to October, when the autumn is high and the air is cool, the amount of bait has gradually decreased. At this time, the amount of bait should be more and less to ensure that the fish will grow fat and strong in the later period. The amount of fertilizer applied accounts for about 20%-25% of the total fertilizer amount of the year.

When applying organic fertilizer, it must be fermented first and then sprinkled. Organic fertilizers are generally used in early spring and late autumn. Fertilizers should be applied frequently during the high temperature season in summer. On the one hand, chemical fertilizer fish farming can fertilize water and promote the growth and reproduction of plankton, which is conducive to the growth of silver carp; on the other hand, it can provide fish with a good ecological environment with high dissolved oxygen and low oxygen consumption, which is very good for preventing fish from floating in summer. Effect. The application is based on the principle of small amount and many times, generally once every 5-7 days, 5 kg of ammonium bicarbonate and 5 kg of phosphate fertilizer each time. Old ponds with more silt should apply less nitrogen fertilizer and more phosphorus fertilizer; newly opened ponds or ponds with less organic fertilizer application should apply more nitrogen fertilizer and less phosphorus fertilizer.