In pond culture, fish species are cultivated into edible fish in ponds. All the production processes, such as fish stocking, feeding managemen
In pond culture, fish species are cultivated into edible fish in ponds. All the production processes, such as fish stocking, feeding management, escape prevention and disease prevention, water catching, etc., are carried out in a planned and purposeful manner under artificial control, so high yield can be obtained.
China has a long history of pond culture. As early as 2000 BC, people raised carp. In 475 AD, Fan Li, a fish farmer in China, wrote a book "Classic of Fish Culture". This is the earliest book about fish culture in the world. Many experiences in the book still have some practical value.
The vigorous development of pond culture and the reform and innovation of fish culture technology were still after the liberation of the whole country. Under the leadership of the Party, the vast number of aquatic science and technology personnel have comprehensively summarized the rich experience of China people in fish farming for thousands of years, including water (deep water and flowing water), species (good varieties are beneficial), bait (sufficient bait accuracy), dense (reasonable dense release), mixed (multi-culture), round (round catch and round release) and prevention.
Pond culture can not only make full use of water and soil, increase income, but also provide high-quality organic fertilizer for farmland. The yield per mu reaches 250-300 kg: the average ammonia content in the pond mud of fresh fish is 0.0695%; The phosphorus content is 0. 153% and the potassium content is 0.054%, that is, every 5000 kg of pond mud contains ammonium sulfate 19 kg, 38 kg of calcium superphosphate and 4.5 kg of potassium chloride, which is equivalent to 60 kg of chemical fertilizer. Each mu of pond mud is equivalent to 10- 15 fat pigs.