First, shrimp pond conditions
The experimental shrimp pond is located in the south of the Haichao Dam in Hutouya Town, Laizhou City. The shape is a pentagonal shape with an area of ​​20 mu and an average water depth of 1.2 meters. The sediment is infiltrated into the ground, and the water entering and draining passes through other adjacent shrimp ponds (reservoir). After the cultivation was completed last year, the pool of dry water was exposed to the bottom of the pool. This spring, the pool was cleaned up manually and the bottom of the pool was contaminated. A cultivator was used to loosen the bottom of the pool and 400 kg of quick lime was disinfected.
Second, the breeding process
1. Put the seedlings into the water on April 6 and use a small amount of organic manure and fertilizer. On April 20, the reservoir was flooded from the reservoir. On May 4th, 180 000 Japanese prawn seedlings were purchased from Haichao nursery. Shrimp seedlings are 1cm in size, lively and lively, with thick blacks and robustness, and they have a strong crawling ability after leaving the water.
2. Water quality regulation During the cultivation period, water is not changed, and water is added every 2 days to 3 days. From May 15 onwards, drugs are used once every 5 days to treat pool water. Antwerp Iodine is used interchangeably with Antcon. The cost of processing once is about 80 yuan. Regular monitoring of water quality indicators, when the pH value is higher than 9.0, use the "Ante reducing alkalinity" to adjust.
3. During the initial feeding of bait, considering the large amount of hook shrimp in the shrimp pond, 150 kg of lees were successively fed. On June 4th, the body of the shrimp was more than 6 cm long and began to be fed with compound feed. The daily feeding amount was about 1.5 kg and gradually increased thereafter. At the time of harvesting, a total of 360 kg of “Haiyue†brand compound feed and 400 kg of bluegrass were fed.
4. Disease prevention and control According to the weather conditions and the water quality conditions, the "Baby King of Shrimp" and "Shrimp in the Rain in the Shrimp" are added to the bait, and a course of treatment is given every 5 days.
5. Harvesting The shrimps will be harvested on July 12th. At this time, shrimps will be 10cm in size, 100/kg to 120/kg. By July 18, a total of 1,100 kilograms of shrimp was collected, yielding 55 kilogrammes. The survival rate is about 70%.
Prawns sell for 34 yuan/kg, with a production value of 1865 yuan/mu and a total output value of 37,300 yuan.
The aquaculture cost totaled 13,300 yuan, including 1,800 yuan for seedlings, 1200 yuan for utilities, 3,000 yuan for shrimp ponds, 3,800 yuan for food and medicine, 3,500 yuan for labor and specialty taxes. The profit of the experimental shrimp pond prawns was 24,000 yuan, equivalent to 1,200 yuan per mu.
Third, a few experience
1. To create shrimp pond conditions suitable for the growth of Japanese prawns. The shrimp pond area is small and easy to manage. It is an important prerequisite for high yields, regardless of which shrimp species are cultured. However, Japanese prawns are benthic shrimps. They prefer fresh water and low water depth requirements. A shallow water level is beneficial to increase the water temperature and increase the content of dissolved oxygen in the bottom layer, which is beneficial to the growth of Japanese prawns. Due to the small amount of water changed, the salinity of the pool water remained at 35 to 41 for a long period of time, but the growth of the shrimp was normal. This shows that the Japanese shrimps have strong adaptability to high salt.
2. Do a good job of basic bait culture, promote the rapid growth of shrimp and early water inoculation breeding basic nematodes, arrowheads and other bait, is very beneficial to the breeding, especially small benthic animals represented by hook shrimp, adaptability, reproduction speed Fast, simple culture methods, shrimp like feeding, nutrition effect is obvious, can promote the rapid growth of shrimp, improve shrimp immunity, reduce the incidence, reduce the pollution caused by premature feeding.
3. Maintaining a pool of water is the key to healthy farming. Controlling diseases must be about 60 centimeters in order to prevent the main transparency and prevent water quality aging and high pH. Use disinfectants regularly to suppress the reduction of bacteria, viruses and ciliates. Avoid large-scale irrigation in culture, to maintain the relative stability of water quality physical and chemical biological factors.
Attention should be paid to improving the quality of feeds and adding drugs and feed additives that can improve immunity to prevent diseases. The amount of feed should not be large enough to prevent the water quality from being contaminated by the bait; if shrimps come out for food at 2 pm, they should increase in time. Feeding amount.
Japanese prawn plentiful breeding is one of the important items for marine aquaculture, but due to the disease infestation, the incidence rate remains high. Most of the yields of oyster prawn are mostly below 30 kg/mu, and the efficiency has been unsatisfactory, especially After the price of shrimp declined, the loss surface became larger and larger. In recent years, with the use of high-quality compound feeds and new types of drugs for the prevention and control of shrimp diseases, some high-yielding and high-efficiency aquaculture models have emerged, and the prospects of the shrimp industry have gradually become clear. In this year's Japanese shrimp culture process, Haichaoba Farm in Laizhou City, Shandong, follows the concept of “aquaculture and water conservation†as the scientific breeding concept, and applies the series of pharmaceutical products of Beijing Zhongdaant Company in the breeding process. With a yield of 55 kilograms, the net profit per mu is over one thousand yuan at a price of only 34 yuan/kg. Two oysters have also been seeded and are currently growing well. The specific circumstances are introduced as follows for reference by peers.