"The effect of fish pond fertilization is mainly on the reproduction of plankton, epiphytic algae and benthic animals. After fertilization, there will be a large number of microorganisms and a large increase in organic debris, which will provide abundant food resources for the cultured fish such as oysters and clams. Rotten organic fertilizers can be eaten directly by fish such as cockroaches and cockroaches.†April 1st, Aquaculture in the county’s Water Affairs Bureau at a fishpond in the fish culture base of Group 3 in Yuming Village, Mengxi Township, Yilong County, Nanchong City, Sichuan Province Hu Zhaojun, stationmaster and senior agronomist, explained the issues raised by the villagers while explaining the fish pond fertilization techniques to the villagers. He said that fertilization in spring fish ponds should do the following:
Organic fertilizers 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, such as manure, livestock and poultry manure, must be fully fermented. Fermentation and decomposing of fertilizers with organic matter applied to fish ponds can reduce the consumption of oxygen in the water, can be quickly absorbed and used by phytoplankton, and can also kill pathogens in organic fertilizers. Biogas fertilizer is best.
Shi Heng Shi Qin Shi
The so-called "less application" means that every application of organic fertilizer is from several tens of kilograms to one hundred kilograms per acre; the so-called "uniform application" means that the water and the manure are poured evenly throughout the pond so that the color of the fishpond is yellow-brown or oil-green. No oil film, the transparency is maintained at 20 cm to 30 cm; the so-called "diligent", that is, with the fish feeding, whenever the pond water is reduced, the transparency is greater than 30 cm, immediately re-fertilize.
Determine the amount of fertilizer due to fish
It is not the fish pond that raises the main fish and fish. Since the feed is fed, the amount of fertilizer applied in spring needs to be reduced accordingly, so that the transparency can be kept between 30 cm and 40 cm. With the increase of temperature, the 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.
Good morning fertilization
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. .
Regular change of water and fresh water
Excessive accumulation of metabolic wastes of organic matter and various types of organisms in fish ponds, decreased oxygen levels in the water, and poor composition of plankton may 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 coolâ€.
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