1 Pond conditions Aquaculture ponds are used for 11 breeding sites, including 1 mu of 3 mu, 9 mu of 5 mu, and 1 mu of 12 mu, with a total area of ​​60 mu. The water depth is 1.6-1.8 meters, the bottom sediment is mud, the slope is 1:31:4, and the slope is fine sand. The water source is Dongluo reservoir water supply in Baoluo. There is no industrial pollution, and mechanical water lifting is used to facilitate drainage and irrigation. 2 Prepare before stocking 15-20 days before stocking, drain water from the pool and remove debris. Use 50-100 kg of quick lime per acre to dry clear the pond. Let the sun shine for 10-15 days and then fill 50-100 cm of water. When using the 40 mesh sleeve filter, the water quality of the water in the rear view pond is mainly transparent, chemical fertilizer fertilizer is used, and the amount of nitrogen is 5PPM, phosphorus 5PPM, and potassium 2PPM to cultivate food organisms so that the transparency of the pool water reaches 3035 cm when the seedlings are released. . Water hyacinths are transplanted around the pond and a row of branches is added about 8 meters away from the pool to increase the habitat of the shrimp. The area covered by water hyacinth is about 1/5-1/4 of the water surface, and each pool is set. 12 aerators. 3 After the release of the seedlings, the toxicity of the pool water disappears. The shrimp seedlings were obtained from desalinated shrimp seedlings at Wanzhou Prawn Nursery of Wanning City and Macrobrachium Nursery of Tanmen of Qionghai City. They were cultivated in cages of 20-30 days (density 3000-5000 tails/m2) and individuals reached 2.0. -3.0 cm before launch. When the cage is opened, the shrimp should be slowly put into the water. The maximum seedling density was 26,700/mu, the minimum was 130000/mu, the average was 18,900/mu, and the total amount of seedlings was 1.135 million. After breeding for one month, there were 80 species of oyster and squid that were more than 15 cm in size per acre of water. 4 Feeding management 4.1 Feeding of feed: The type of feed is mainly small fish and compound feed. The first month after the seedlings was used, small trash fish were used. When the fish were fed, they were chopped, rinsed, and boiled before being fed to prevent contamination of water quality. In the first month after the seedlings were cast, they were fed with small trash fish. The daily rate was 1.5-3.0 kg per 10,000 tails, 3 times a day, and a drop was thrown around the shallow water area around the pool. From the 2nd month, small trash fish and compound feed were used. The daily rate was 8-10% of the body weight; after the third month, the compound feed was supplemented by the main small fish, and the daily rate was 48% of the body weight. The specific daily dose should be combined with the daily climate, water quality and growth of the shrimp. 4.2 Monitoring and Management of Water Quality: The maximum water level of the pool water is added to the fishpond within 1 month after the seedlings are planted. Afterwards, water is changed at any time depending on the water quality and growth conditions of the shrimp, but the amount of water exchanged does not exceed 20% each time, so that the water quality environment Relatively stable. Twenty-three patrols a day, measure water temperature, regularly measure pH value, dissolved oxygen, and transparency. Sprinkle 15-20ppm of lime every 10-15 days. According to the problems found in each patrol pond, take new water and replace it with new ones. Aerators and other measures to prevent shrimp floating pan pan. Water quality during the test, pH 6.47-9.15, dissolved oxygen above 3PPM, transparency 25-40 cm, water temperature 18.0-31.4°C. 4.3 Determination of growth conditions: In order to understand the growth conditions of the shrimp and to change the feed, a part of the shrimp is checked with a triangular net every 10-15 days; another 4 shrimp ponds of different stocking time are selected, every 20- About 30 days, 50 shrimps were captured to determine their length and weight to understand their growth. 5 Test results 5.1 Yield and individual size: The trial began to be voted on July 11, 1997. The harvest was completed on March 21, 1998. The shrimp seedlings were placed at 1.135 million and the fry were 0.48 million. The test area was 60 mu. 13308 kilograms of Macrobrachium rosenbergii, with an average yield of 221.8 kilograms per mu, with a maximum of 275.9 kilograms and a minimum of 175.2 kilograms; the average size of individuals is 57.75 grams, the maximum is 77 grams, and the minimum is 8 grams, 94.5% of which is more than 8.5 centimeters, and accounts for more than 20 grams. 86 %. In addition, a total of 5,390 kilograms of squid and squid were collected, and the average yield was 89.8 kilograms. 5.2 Output Value and Economic Benefits: The output value of Macrobrachium rosenbergii is 665,400 yuan, the output value of cockroach and squid is 26,950 yuan, totaling 692,350 yuan, and the average mu production value is 11,539.17 yuan. 2? Seedling fees 73,440 yuan, feed costs 18,3656.4 yuan, labor costs 24,000 yuan, machinery and utilities 62,526 yuan, drug costs 5,000 yuan, management fees 10,000 yuan, a total of 35,8622.4 yuan. Total feed 404698 kg, of which 30363 kg of artificial material, 25267 kg of small fish? Artificial bait is 1066 kg?, Feeding coefficient of 2.164. The input-output ratio is 1:1.93. The profit was 33,3726.6 yuan and the average profit was 5,562.13 yuan. 6 Discussion 6.1 Quality of Cultured Shrimp: In the course of the experiment, the size of the shrimp was found to be uneven and the growth was slow. In addition to the lower water temperature and management level conditions in winter, the traceability of this source is mainly related to the broodstock germplasm. It is understood that the production of seedlings units does not impose stringent selections on broodstock, especially in the latter part of the production period. Since broodstock is insufficient, as long as the broodstock is obtained for production, inbreeding is quite serious. The shrimps produced in this way are mixed and the individual size of the breeding process is different, and the growth rate is slower. It is still necessary to develop Hainan's superior climate and water resources for the release of natural water systems to solve the problem of high-quality broodstock sources. On the other hand, the seedling production units should make strict choices to prevent the use of the same broodstock as a breeding ground for progeny. Shrimp to improve the quality of shrimp seedlings. 6.2 The use of favorable conditions for the full use of the winter and spring seasons to strengthen the water quality management of the aquaculture process. In order to give full play to the benefits of water bodies, it is necessary to let go of the number of seedlings if water environmental conditions permit. Since the water temperature conditions in winter and spring seasons are lower than those in summer and autumn, the metabolism of various organisms in the water environment is reduced and the decomposition of organic matter is slowed, resulting in a decrease in oxygen consumption in the water body. Therefore, the stocking density of cultured species can be relatively increased, which is the yield per unit area. The improvement has played a decisive role. However, do not ignore the management of water quality in the breeding process, especially the monitoring of dissolved oxygen and the configuration and use of oxygen-enhancing equipment to prevent loss caused by oxygen deficiency. We also discovered several times of oxygen deficiency during the experiment, but due to the use of aerators and new water injection measures, some losses were recovered, but recently due to mental paralysis, management was relaxed, resulting in 2 Kouchizi (Huoluo No. 2 and Hushanzi No. 2) took measures because of lack of oxygen and died more than 300 kilograms of shrimp. For this reason, the management of water quality in the aquaculture production process must arouse our great attention and can only be strengthened rather than relaxed.