Spring production of green shrimp

I. Timely shrimp seed cultivation

With the warming of the weather, when the water temperature rises above 20°C, the shrimp begins to shell out. At this time, the shrimp body is susceptible to bruising. Therefore, we must strive to finish the work of spring penguin division by March 10th. Before stocking, ponds should be well-grounded and quickly disinfected with bleaching powder, active iodine and other methods. Ponds with moss, green algae and bluegrass should be sprayed once with copper sulfate. There is no need to artificially dig a ditch in the pool without shrimp gullies, which will not only facilitate the accumulation of water in the pool, but also facilitate the capture of shrimp. The stocking rate per acre varies depending on the size of the shrimp and is generally controlled at 10-20 kg.

Second, water quality management

The water level of the pond where the shrimp has been reared is not easy to be low, and the minimum water level is maintained at 60 cm or more, and fresh water is added every 7-10 days. The leaner ponds should stack 200-400 kilograms of fermented organic fertilizer and 5-10 kilograms of chicken manure. It plays a role in cultivating fertilizers, increasing natural animal foods, and reducing the occurrence of three hazards (moss, stinky green sand, blue net algae) in the pool. If the fertility of the pond is more than enough, an inorganic fertilizer (such as compound fertilizer) is applied once the temperature rises, 5-7.5 kg per mu. At the same time, the pond should be properly cultivated and transplanted with aquatic plants, accounting for about 30% of the total area.

Third, do a good food feed

When the temperature of the water rises above 18°C ​​when the weather is fine, feed should be fed in time. Start a meal every day, increase the normal weather and increase it to the previous and afternoon, and use your own green barley, Maimaifu, soybean cake or full-price shrimp feed, and add animal feed such as small trash fish and fishmeal. 6-8% of the pond volume. Do a good job of inspection after feeding, according to the daily diet of shrimp, increase or decrease the amount of feed in time to adjust, not only to prevent waste, but also to prevent inadequate feeding.

Fourth, to prevent shrimp disease hazards

After stocking, normal shrimp ponds can use bleaching powder and active iodine Quanchiposa once in mid-March to prevent bacterial infections caused by bumps. If ciliate disease is found during inspection of the shrimp body, the ciliary net must be used to kill the parasite first, and then a bactericidal drug (such as chlorine dioxide) should be used to kill bacteria after 5-7 days to prevent black worms. Disease, red spot disease.

Fifth, prevent floating can not be ignored

Although there will not be a large number of hypoxic floating heads in the spring like in summer, after a sudden increase in temperature, in case of prolonged rainy weather, combined with shallow water levels, poor water quality, improper use of medicines, precipitation of large numbers of blue algae, decay, and dry ponds. No ponds in the sun ponds, shrimp stocks are overstocked, shrimps are sick, etc., can easily cause anoxic floating heads. Therefore, it is still necessary to look closely at shrimp ponds, pay attention to changes in the weather and water quality, not blindly use drugs, pay attention to adding fresh water frequently, and do a good job of anti-floating work. Stocking density shrimp ponds should also be activated at noon for 1-2 hours at noon to increase dissolved oxygen in the water to prevent dead shrimp caused by lack of oxygen floating heads.

Sixth, catch small stay listed

Spring shrimp stocking specifications are different and the number is relatively high. The cage trap method can be used to stimulate the cage with flush water to maintain the quality of the shrimp. Avoid using “enemy kill” and other potions to catch shrimp and catch shrimp. This not only causes damage to unlisted shrimp but also does not comply with pollution-free food requirements. Therefore, we must consciously abide by the implementation, so that listed shrimp gradually embark on the road of pollution-free, green food, to provide quality aquatic products.

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