As a new form of aquaculture, the new technology of microporous pipeline oxygenation has been applied in the current shrimp and crab pond aquaculture. The microporous oxygenation aquaculture technology can not only improve the oxygenation effect of the aquaculture water body, but also have important significance for maintaining a good water ecological environment. All demonstration households using this new technology in Suining County, Xuzhou City, Jiangsu Province have also achieved satisfactory results. The summary is as follows for reference only.

1、 Pond reconstruction

According to the current actual situation of the pond, necessary adjustment and transformation should be carried out. The fundamental goal of the transformation should be sufficient water source, less sludge, fresh water quality and abundant bait. It provides a good growth environment for the growth of fish, shrimp and crab, and is conducive to the improvement of the yield.

2、 Construction of escape prevention facilities

The escape prevention facilities are usually built on the embankment, and the height and internal inclination angles are 1250px and 15 ° respectively. Generally, double-layer plastic can be used to enclose them. At the same time, a wooden pile shall be buried around the pond every 50px, and the double-layer plastic of corresponding size shall be pasted against the inner side of the wooden pile, compacted and compacted, and the double-layer plastic shall be perforated and fixed on the wooden pile with iron wire.

3、 Installation of microporous tube and roots blower

Generally speaking, most of the micro hole aquaculture methods are short strip oxygen increasing systems. During the installation process, the main air supply pipe shall be erected at about 375 PX higher than the water level of the pond. The erection position shall be located in the middle of the pond and run through the whole pond. Then, with the main gas supply pipe as the center, lay a microporous tube on the left and right sides of the water. The two ends of the microporous tube are respectively connected to the main gas supply pipe and 1m away from the pool ridge, and make them horizontally distributed. The roots blower is installed near the pond, and the gas is transported to the aeration tube around the pond through the main pipe and the aeration disks installed at the bottom of the pond, so that the whole pond can achieve the effect of oxygen increase.

4、 Hydrophyte planting

Generally speaking, according to the size of the pond, the farmers need to set the width and spacing of the water grass belt in combination with the actual scale before planting the water grass. At present, the widely used water grass mainly includes Elodea, bitter grass and black algae. Generally, the planting area of aquatic plants should not exceed 30% of the total area, and should be evenly distributed. This is not only conducive to the smooth flow of water in the shrimp and crab ditches, but also can help river crabs better feed and avoid enemies.

5、 Seedling stocking

The released seedlings are mainly green shrimp and river crab. In the spring, the specification of shrimp species is 2000 / kg, and the quantity can be set according to the actual situation. In the first ten days of March, the specification of river crab species is 60-150 / kg. The specifications of shrimp species and river crab species should be consistent, with complete appendages and agile activities.

6、 Water quality control

"New" and "excellent" are the fundamental objectives of water quality control. First, water should be changed regularly, and the water depth should be controlled at about 0.6m from March to May; From June to August, the water depth should be controlled at about 0.9m; The water depth should be controlled at about 1m from September to October. At the same time, during the breeding period, water should be injected every other week, about 375 PX each time. On this basis, the water quality should be regularly reduced, and the leftover food and dirt should be removed in time to keep the water clean,. Secondly, the dissolved oxygen should be adjusted. In high temperature season, the opening time of the microporous tube oxygen increasing facilities should be kept at 6 hours every day. In good weather, the microporous tube oxygen increasing equipment is opened from 2:00 a.m. to sunrise the next day. In rainy days, the oxygen increasing time can be appropriately extended according to the specific conditions.

7、 Feeding of bait

It is generally dominated by mussels and high-quality miscellaneous fish. The feeding amount shall be set according to the number of seedlings and the specific growth period. The feeding method should adhere to "four fixed" and "four look", and then reasonably determine the feeding amount of bait on this basis.

8、 Daily management

The focus is mainly on the management of river crabs, supplemented by shrimp management. In the high-temperature environment, it is necessary to patrol the pond every day to comprehensively and systematically grasp and understand the growth of river crabs. In the heavy rain environment, it is necessary to focus on the prevention of river crabs from escaping. In addition, it can prevent shrimp and river crab from being attacked by enemies such as water mice and frogs. Do a good job in disease prevention, and use quicklime, microbial agents and other drugs regularly or irregularly to prevent disease. At the same time, it is also necessary to ensure that the water quality environment meets the standard, regularly measure the water quality, and make records so as to take corresponding measures.

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