High benefit of silver carp culture led by science and technology

The breeding of adult fish (commercial fish on the market) is the destination and purpose of production. Recently, although special aquaculture has become "hot" all over the country, the traditional breeding and consumption of silver carp and bighead carp are still bulk currency, and the economic benefits are still considerable, with small investment, quick results, easy operation, many provenances, mature production and other advantages. it is very popular with fishermen. The key points of its production technology and technology are mainly the use of "water seed bait dense mixed wheel prevention and tube" intensive culture method.

1. The pond condition area is 0.3-1.4 hectares, the bottom clay soil is good, the pond depth is 3.5 meters, the effective water depth is 2 meters-3 meters, the pond is close to the power supply, the water quality is good, the injection and drainage is convenient, the light is comprehensive, and there are flood control and escape prevention facilities. the east-west direction of the rectangular pool is suitable.

two。 Fish species can be released only after they have been cleaned and sterilized in the pond. When it was released in the autumn or early spring of last year, the specification was that silver carp and bighead carp should be more than 14 cm or 25 grams, the proportion of silver carp and bighead carp mixed with other fish should be more than 14 centimeters or 25 grams, and the proportion of silver carp and bighead carp should be 55%. Bighead carp 10%, grass carp 15%, carp 10%, carp 10%. The ratio of silver carp to bighead carp can be at 5:1 or 6.7. For example, with silver carp and bighead carp as the main fish ponds, 300 silver carp (cm specification), 50 bighead carp (17 cm body length), 30 grass carp (tail weight 0.4 kg) and carp tail (14 cm body length) totaled 430, the total yield per mu can reach more than 250, and the profit per mu can reach about 500 yuan.

3. The feeding of artificial bait should adhere to the methods of timing, quality, fixed point and quantitative, and the feed should be fed with bean cake, soybean dregs, bran and granules, etc. To apply fertilizer, 300 kg of human manure or animal manure should be applied per mu of water surface before fish stocking, and more or less fertilizer should be applied according to the water quality, such as using chemical fertilizer 1.5 ~ 2 kg of urea per mu of water and then sprinkling 4 kg of ammonia. The proportion of fertilization in each month is 35% from April to May, 45% from June to July, and 20% from August to September. Fertilization adhere to the weather, water quality, fish conditions and other phenomena and the principle of less investment. Water is light green, transparency of 30 cm indicates that thin water should be fertilized or more fertilized, yellowish green or yellowish brown, transparent in 15 to 20 cm shows proper fertility, should not be fertilized.

4. Daily management should persevere in patrolling the pond every morning and evening, grasp the information basis by looking at the sky, water and fish research, and arrange production planning and operation. Monitor and regulate water quality and quantity. Find thin water, diseased water, diseased fish, hypoxia, enemies, loopholes, floods and so on, treat them differently and solve them seriously as soon as possible. And timely make a good fish culture log, it is convenient to sum up experience, draw lessons, improve measures, develop measures, develop technology, in order to increase production and increase efficiency.