1 Shrimp Pond Cleaning

After a year of cultivation and production in the shrimp pond, the pond ridges will be damaged by wind and waves, the silt at the bottom of the pond will thicken, and the residual bait will be added. , the deposition of fish and shrimp feces, and the pond conditions deteriorate, so it must be cleaned in time to improve the living conditions of Macrobrachium rosenbergii.

(1) Dry pond exposure: Take advantage of the idle time of the shrimp pond in winter and spring to drain the pond water and fully expose the pond bottom to accelerate the decomposition of organic matter, loosen the soil at the bottom of the pond, improve pond fertility, and reduce diseases.

(2) Pond trimming: remove silt, reinforce and trim the pond ridge, plug leaks and prevent seepage, improve the inlet and drainage system, remove weeds, and smooth the bottom of the pond to prepare for shrimp farming production in the following year. 2. Pond clearing and pest control. Pond clearing and pest control refers to the application of drugs before stocking to remove various harmful organisms that are not conducive to the growth of Macrobrachium rosenbergii. It can be divided into two types: dry pond clearing and water clearing pond. There are many kinds of pond clearing drugs, which should be appropriately selected according to the specific conditions of the harmful organisms in the shrimp pond. The duration of the potency of different drugs is also different, which is related to the planting time after clearing the pond. Generally, it can be 10 to 15 days before planting. Clear the pond every day. Commonly used drugs for clearing ponds include quicklime, bleaching powder (bleaching powder essence), tea meal, croton, rotenone, ammonia and trichlorfon, etc., which can be flexibly selected according to the situation of harmful organisms. 3 Inject water for fertilizer cultivation

Under normal circumstances, the medicinal properties will disappear 7 to 10 days after clearing the pond. At this time, new water can be added to the shrimp pond. When filling water, a filter should be installed at the water inlet. The mesh should be about 60 mesh, and it should be installed tightly to prevent harmful organisms, floating weeds and debris from entering the shrimp pond. In order to quickly increase the fertility of the shrimp pond after clearing the pond and cultivate the shrimp's natural feed organisms, adding new water should be done in batches. In order to enable shrimp seedlings to fertilize the pond, applying base fertilizer is a very important technical measure. The base fertilizer generally uses organic fertilizer, which mainly includes manure (human urine, livestock and poultry), green manure (such as water grass, dry grass, leaves, etc.), mixed compost (that is, green manure and manure are mixed and fermented), etc. The amount of fertilizer applied depends on the pond conditions, water quality, and fertilizer quality. Generally, 150 to 300 kilograms are applied to 1.5 acres. In short, the pond water should be cultivated into high-quality water with a yellow-green or reddish-brown color and a transparency of about 30 to 35 centimeters, so as to improve the survival rate of shrimp seedlings in the pond and promote the normal growth of shrimp seedlings. At the same time, the time of fertilization must be strictly controlled, 3 to 4 days before planting seedlings, and no more than 1 week at most, so that the feed can be palatable to the organisms. 4. Set up shelters

Macrobrachium rosenbergii likes to live on the bottom. It is usually found on the edge of water and likes to climb on aquatic plants or other objects. Therefore, it is best to have higher aquatic plants, benthic animals, epiphytic algae, plankton and microorganisms in the pond. These species can be used as feed for shrimps and as hiding places, especially when Macrobrachium rosenbergii grows and molts. Can effectively avoid harmful creatures. Therefore, when cultivating Macrobrachium rosenbergii in ponds, aquatic plants should be artificially transplanted and shelters should be set up to create a good growth and living environment for the shrimp. At present, the aquatic plants used more frequently in production include water peanuts and water spinach. They must be cleaned when transplanted. The transplanted area of ????aquatic plants is controlled at about 5% and should not exceed 10%, otherwise they must be removed in time.