Fish pond spring fertilization five points

The role of fertilization in fish ponds is mainly the reproduction of plankton, epiphytic algae, benthic animals and other natural foods. After the fish ponds are fertilized, microorganisms multiply and organic debris is greatly increased, which provides abundant food resources for farmed fish such as cockroaches and cockroaches. Some rotten organic fertilizers can also be eaten directly by fish such as cockroaches and cockroaches. Fish pond fertilization in spring should pay attention to the following matters: 1, organic fertilizer must be fully fermented. The temperature of fish ponds in spring is low, and the oxygen content in water is relatively abundant. Rational application of organic fertilizers is not only cost-effective, but also can achieve good breeding results. Fish ponds use organic fertilizers such as large excrement, livestock and poultry excrement, and must be fully fermented in advance. Organic fertilizers are fermented and decomposed, and organic matter is decomposed. When applied to fish ponds, the organic fertilizers can reduce the consumption of oxygen in the water and can be quickly absorbed and utilized by phytoplankton. 2, the principle of fertilization, less Shi Shi Qin Qin Shi. The so-called "less applied" means that each application of tens of organic fertilizers to 100 kg per acre. The so-called "uniform application" means that the water and the entire pond should be sprinkled uniformly so that the color of the fish pond is yellowish-brown or oil-green, and the water surface is oil-free. The transparency is maintained at 20 cm to 30 cm. The so-called "diligence", that is, with the feeding of fish, whenever the pond water is reduced in fertility, transparency greater than 30 cm, immediately re-fertilize. 3, fertilization time, sunny morning as well. Pay attention to listening (looking) to the weather forecast, not fertilizing on cloudy or rainy days. Phytoplankton grows through photosynthesis and fertilizes in the morning on sunny days from 2 days to 3 days. It can quickly and best promote the proliferation of microorganisms, minimize the pollution of organic fertilizers on water quality, and ensure the benign circulation of fish and pond materials. . 4, determine the amount of fertilizer because of the appropriate fish. It is not the fish ponds that raise fish and ponds. Because of the feeding of feeds, the amount of fertilization in the spring should be reduced accordingly, so that the transparency can be kept between 30 cm and 40 cm. With the increase of temperature, the fish pond water will become more and more fat. Intensive breeding of fish ponds with high yields of squid and intensive culture of grass carp, although they have raised some squid and carp, they should not be fertilized in spring. 5. Change water regularly to keep the water fresh. If the accumulation of metabolic wastes of organic matter and various types of organisms in fish ponds is excessive, the oxygen content in the water will decrease, and the plankton composition will be poor, which will affect the growth of farmed fish. Therefore, it is necessary to change the new water regularly so as not to overload the fish ponds and keep the water quality “fat, live, tender and cool”.

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