Retrofitting aging shrimp ponds with over 1000 kg per mu

First, the proposed "reconstruction of aging shrimp ponds, shrimp production per mu over a thousand pounds," the test project, Zhanjiang Yuehai Feed Co., Ltd. one of the year 2001 research project tender project, is for more than 10,000 hectares of aging shrimp in Zhanjiang area How to reform the pool so as to exert its expected output and benefits. There are more than 10,000 hectares of shrimp farming ponds in Zhanjiang built in 1986 and 1987. Due to the low standard of infrastructure for shrimp ponds at that time, and after more than 10 years of cultivation, the shrimp ponds have become more and more aging. In recent years, these shrimp ponds have low yields of shrimps and are prone to diseases. As a result, many farmers have suffered serious losses in shrimp farming, and even some shrimp ponds have been abandoned, leaving unused resources. In recent years, people have developed coastal high-grade ponds and cultivated shrimps, which have developed rapidly. The coastal areas that are suitable for the development of shrimp farming have all been developed and utilized, and the development of shrimp farming along the coast has been limited. For the sustainable development of the shrimp industry, it is necessary to make a fuss about the transformation of old shrimp ponds. Therefore, how to reconstruct the aging shrimp pond so that the shrimp ponds built in the tidal flat resources used in the past few years will exert their productivity and achieve high productivity and high efficiency, so that the sustainable and healthy development of shrimp farming in our city will be studied by every shrimp farmer. One of the important topics. Second, shrimp pond selection and transformation methods 1, the choice of shrimp ponds. A 1.3-hectare shrimp pond with a mouthful of shrimps from Chentou Village, Shantou Village, Lemin Town, Suixi County was selected. The shrimp pond was completed and put into production in 1987. The original shrimp pond can reach a depth of 1.5 meters, but it cannot drain bottom water. When the pool water is discharged to the lowest water level, there is still 50 cm of deep water that cannot be discharged. The shrimp production has always been low. All losses. 2. Renovation method 1 Transform the bottom of the shrimp pond and create a new breeding environment. According to the situation that the pool bottom of the shrimp pond is too deep to drain the pool water, the method of removing the pond by removing the soil from the pond pool shall be adopted first, that is, the surplus earth in the shrimp pond embankment shall be filled back to the bottom with a bulldozer and an excavator, and then the agricultural film shall be used ( 0.8mm thickness), and then fill in 30cm thick sand to raise the bottom of the shrimp pond. Even if the water is completely drained from the drain gate, it can make the bottom of the pool not leak and make the bottom of the mud pool become sandy. Bottom shrimp pond. 2 Do a good slope protection to prevent leakage and ensure deeper water levels. The method is to use black anti-seepage geomembrane (190g/m2, 5m wide) produced by the Foshan Jingzhou Plastic Group Jingwei Branch Company to lay on the edge of the pool to prevent water leakage from the edge of the pool, so that the shrimp pond can retain water 1:8 meters. . 3 build a filtration and pumping system. The method of constructing a filtration and pumping system consists of arranging 40 cement precast culverts each having a length of 90 cm and an internal diameter of 60 cm with 60-100 mesh sieves and burying them under a sand layer 40 cm deep in the middle tide zone, and then picking them along a horizontal line. One is buried directly above the high tide area, and then a manhole is built at the filter culvert. The seawater is filtered from the culvert to the manhole, and then the filtered seawater is pumped through the manhole to the shrimp pond. Third, the supporting generator set and aeration equipment Original shrimp pond is a common shrimp pond, in the past there is no pumping, oxygen and other equipment, in order to make the shrimp pond get high output, the project supporting two 15 kilowatts and a 12 kilowatts of power generation The unit is also equipped with 5 Cohn aerators, 7 1.5-kW impeller aerators and 6 1.5-kilowatt waterwheel aerators. Fourth, prawn farming operation method 1, clear pool disinfection and culture of food organisms. After the sand pool at the bottom of the shrimp pond is reformed, some seawater is pumped and cleaned, and the bottom of the pool is disinfected with a high-efficiency disinfectant of 20 ppm. After two days, the seawater is pumped into the water to reach a water level of 60-80 cm, and then the biological feed is fertilized. Mainly in the "Fertilizer King" even spilled Quanchi water, the first amount of 8 kg. 2, launch shrimp. After fertilizing water for 5 days, the pool water appeared pale yellow, the water transparency was 40cm, the pH value was 9.0, and the specific gravity was 1.016. On May 22, 1.8 million tailed penaeid shrimps were cultivated at Yinhai shrimp farm in Suixi County, with an average of 810,000 tails per hectare. Shrimp seedlings are 0.8-1 cm in length. 3, aquaculture management measures: 1 water quality control. During the aquaculture process, great attention is paid to water quality management. According to the pH and salinity of the test water and the observation of the water color, the water is kept in a brownish or yellowish green color and clear, cool, and live. All the water added to the shrimp pond was extracted by filtered seawater. 2 feed feeding. Guangdong series artificial feed was selected for feeding. Within 15 days after the release of shrimp seedlings, the feed was fed twice a day, each time in the morning and in the evening, and the daily feeding amount was fed by 1 to 2 per 10,000 shrimp seedlings. After 10 days, the number of feeds and the amount of feed were gradually increased. After feeding 4 times a day, they were fed at 8 o'clock in the morning, 11 o'clock noon, 6 o'clock in the evening, and 11 o'clock in the evening. The amount of feed each day is determined based on the shrimp's food intake, water quality, weather, shrimp growth, and activities. During the whole breeding period, the total investment was 16.2 tons and the feed coefficient was 1.1. 3 Inoculation of viable microorganisms to purify water quality. According to the research objectives of the project, the characteristics of high density and low water exchange, in order to control the water quality and reduce the pollution of shrimp excrement, etc., the viable microorganisms were inoculated from the shrimp pond. The selected viable bacteria were mainly the “Sifili” tablets produced by the Zhuhai Cohen Company. The method of use is to place Xifei Li every 7 to 10 times, 90 tablets each time and 6 times in total. 4 turn on oxygen, so that the shrimp pool to maintain adequate dissolved oxygen. In the first month after the seedlings, 5 "Cohen" aerators were used to increase oxygen, and 7 impeller-type and 6 waterwheel type aerators were installed one month later, and the oxygen aerator was maintained for 24 hours to maintain the dissolved oxygen in the pool. Above 5mg/L. 5 Strengthen daily management. In the daily management aspect, the main tasks are as follows: First, insist on patrol pool inspection every morning, evening and one hour after each feed. Observe changes in water, shrimp feeding, activities and growth, etc. Corresponding custodial measures were taken in different situations; the second was the detection of water quality factors and the growth of shrimp. PH value is tested once every 5 days (when the water quality changes abruptly, it is detected at any time), the salinity of the water is measured once every 10 days, and the dissolved oxygen and ammonia nitrogen are tested at any time according to the changes in water quality. The growth rate (length, weight, and storage) of shrimp (Estimation of the pond amount) Test once in 10 days; Third, strengthen night inspection, carefully inspect embankments and gate nets, prevent missing embankments and nets to escape shrimp, especially in the late aquaculture period to prevent anoxic pans; The operation of the oxygen machinery ensures the normal operation of the machinery and allows shrimp to grow under sufficient dissolved oxygen. Shrimp pond water quality factor and shrimp growth table date of inspection PH value specific weight of dissolved oxygen body weight (g) pool volume May 22 cast seedlings 9.0 1.016 7mg/L 0.8 ~ 1cm May 27th 8.9 1.016 7mg/L 1.5cm June 2 9.0 1.016 6mg/L 2cm June 7 8.8 1.015 6mg/L 3cm 90% ...... ...... ...... ...... ...... ...... ...... June 22 8.8 1.013 6mg/L 6cm 3.8 85% ... ... ...... ...... ...... ...... ...... ...... July 22 8.7 1.010 6mg/L 8cm 6.2 83% ...... ...... ...... ...... ...... ...... ...... August 22 8.8 1.015 6mg/L 11cm 12.2 80% ...... ...... ...... ...... ...... ...... ...... September 12 8.5 1.008 5mg/L 12cm 15.4 71% September 18 12-14cm 17.9 14630 kg V. Results Prawn culture 120 days in 2001 Harvested on September 18th, a total of 14,630 kilograms of shrimp per kilogram were collected, with a survival rate of 69.5%, and an average of 11,254 kilograms per hectare, equivalent to a yield of 750.3 kilograms per mu. The total output value of 520,800 yuan, the average output value of 400,615 yuan per hectare. In addition to the direct production cost of RMB 258,500 (excluding depreciation of fixed assets), the tax benefit was RMB 262,300. The average tax benefit is 201769 yuan per hectare. VI. DISCUSSION 1. From the effects of shrimp farming, it is feasible to adopt measures and breeding methods for retrofitting aged shrimp ponds. The output exceeds the indicators proposed by the project and realizes a yield of 1500.6 kg of shrimp per mu. 2. The key technical measures of the project are: 1 Filling sand to transform the bottom of the aging shrimp pond, and improve the bottom of the shrimp pond. The pool water can be drained to facilitate the drying of the pool. 2 Construct a filtration and pumping system to make the incoming water clean, and not to bring aquatic animals into the pool to reduce the intermediate host and cross-infection of shrimp pathogens. 3 The application of sufficient quality Penaeus vannamei seedlings is the basis for high yield. The survival rate of shrimp is 69.5%. 4 Auxiliary equipment and the correct use of aerators to maintain adequate dissolved oxygen is an important guarantee for high yields. Keep dissolved oxygen above 5mg/L. 5 Use biological agent Xifeili to purify the water in the pool to reduce shrimp pond pollution. 6 The choice of quality feed is the material basis for the healthy growth of shrimp. During the breeding period, all Zhanjiang Yuehai series shrimp artificial compound feeds were used. 7 Strengthening day-to-day management is an important measure to ensure the success of reconstructing the aging shrimp ponds.

WSP/Premix/Powder/Growth Promtor

Wsp/Premix/Powder/Growth Promtor,Huang Lian Detoxification Powder,Anti-Phlogistic Powder,Qingwen Dudu Powder

Sichuan Aibang Weiye Biological Engineering Co., Ltd. , https://www.aibangpharm.com