Yongkang food tips to clean and clean the pond is the key to raising prawns
date【2017-12-09 09:05】 tip:【】次

It is difficult to raise prawns, which are caused by many factors. The quality of the soil is important, and how to clean up the bottom quality? It is the important measure to prevent disease, the quality of the bottom quality directly affects the water quality, only the bottom quality is good, the water quality is good, "raise water to change bottom first". Yongkang food small make up remind regulate good bottom quality is the important link that raises shrimp success.

I. causes of pond sediment pollution

1, the pond without thorough clean-up Because directly from sea water into the shrimp ponds, no precipitation and filtering, in the absence of aerator agitating, in phoenix flat quiet state, shrimp ponds become "tank". Long silt deposition, along with the residual feed of the breeding process, the excrement of prawns and the remains of biological death, etc., formed thick organic sludge. This should take advantage of the winter leisure time and thoroughly dredging, but many breeders do not realize the importance of dredging, or be restricted by the conditions. It has never completely cleaned up the silt in the pond and accumulated a thick layer of silt at the bottom of the pond. These harmful substances, when the water temperature is high, break down all kinds of harmful substances, produce a series of chemical reactions, make the water quality worse, the prawn disease is frequent.

2. The sedimentation of organic matter is misleading to shrimp farmers in prawn farming, "to be productive and multi-purpose". In order to obtain the highest profit and use low quality feed, the absorption rate of prawn is low, resulting in a large amount of residual bait and fecal residue in the bottom of the pool. The dead bodies of plants and animals in the pool are deposited at the bottom of the pool. These organisms is rich in protein, fat and starch and other nutrients, is to produce ammonia, hydrogen, methane, hydrogen sulfide, organic acid of the harmful material such as curse, is also the root causes of the shrimp diseases.

3. The deposition of chemical antidote and medicine has been used to prevent and treat prawn disease in prawn culture. Due to the extensive use of various drugs, the residue of the drug remains in the bottom of the pool, causing great harm to the beneficial microorganisms in the shrimp ponds, which affects the normal growth of beneficial bacteria in the water. At the same time, make the resistant pathogens, the prawn pond water environment gradually losing the ability to micro ecological balance and regulation, the bottom of the pond of self-purification function is reduced, the prawn growth in a stress state for a long time, very prone to shrimp disease.

4, prawn ponds or edge at the bottom of the growth of weeds such as filamentous green algae and all kinds of aquatic plants, the growth to a certain time will die a natural death decay, failed to clear in time, the pollution of the bottom, and even make the black at the bottom of the phenomenon to appear.

2. Control measures of pollution at the bottom of the pond

1. Thorough desilting and disinfection is an effective method to clean the bottom of the pond. A large amount of silt is deposited at the bottom of the pond after a build or years of cultivation. It is necessary to thoroughly decontamination before release, although the workload is big, it is important measure that cannot be lacked. The silt can be carried out according to the type of the shrimp pond, the high shrimp pond is collected after shrimp, drain water, wash the bottom of the sludge with the water gun, then disinfect after exposure, and then can be raised. General semi-refined shrimp pool, can drain dry water, should be drained first, exposure to the sun, the silt, disinfection. Do not drain the shrimp pool, keep rolling the mud pump, water in the pond, out of the pool, then disinfect with disinfection.

When conditions permit, the final after exposure, bulldozers pushed surface of silt, and then using the tractor ploughing, shi quicklime 50-75 kg per acre disinfection, improved means of acid alkali, make the loose sediment, prompted the decomposition of organic matter, good benthic reproductive growth, and latent prawns, for Japanese prawn is an important measure. Also can use efficient low toxicity and efficacy disappear fast chlorine disinfectants, such as bleaching powder and chlorine dioxide disinfection of sediment kill sediment of various pathogenic microorganisms, viruses, etc., has a good effect to reduce the prawn disease.

If the bottom layer of the old shrimp pool is too thick, it can be mixed with sand improvement when possible, and it has the effect of cushioning bottom and purifying water. It can increase biodiversity, increase the species and quantity of benthic organisms, and enrich the natural feeding creatures, so as to promote the growth of prawn.

2. Regulating water quality and microecological preparation of microbiological agents is a kind of biological repair method widely used in aquaculture. Generally, it can be carried out in two ways, which can improve the water quality and the microorganism of the substrate, mainly nitrifying bacteria, bacillus, ammonia bacteria, photobacteria, EM bacteria, etc. They have improved water quality and bottom quality, increase the dissolved oxygen in the water of the shrimp pond, reduce the ammonia nitrogen content in water, inhibit the improvement of bacterial growth, and improve the ecological balance of water environment. Second, is the mix of feed feeding, to improve the prawn intestinal microbial flora, raise shrimp digestive rate, improve immune system of prawns, currently use more fungi is lactic acid bacteria, yeast, bacillus, etc.

Research has shown that with the extension of prawn breeding cycle, the shrimp ponds at the bottom of the sediment concentrations of total ammonia and total phosphorus will increase, and application of probiotics, slows down the they increase the size of the, make more nutrients released into the water, supply of phytoplankton use and improve the assimilation. With the application of microecological preparations, the concentration of sulphide in the bottom of the shrimp pool decreases. Use of a variety of probiotics, available nitrogen, phosphorus, carbon and sulfur in shrimp ponds and other nutrients, as its growth substrate metabolism, end up with the bottom of the indigenous flora balance, thus reducing the excessive accumulation of nutrients, reduced the number of vibrio, improved the microenvironment of the substrate.

Use of sediment improver, according to the relevant report, should use less as far as possible type adsorption of sediment improver, such as zeolite powder, charcoal adsorption material, such substances harmful material such as a large amount of adsorbed water ammonia nitrogen deposition bottom, the rapid rise, ammonia and other harmful substances in the sediment can make the bottom stunk, easily happened prawn steal die, should pay attention.

3. The pond with more serious pollution of mixed breeding and rotation is more difficult to clean up, which can reduce the occurrence of diseases caused by the mixing or rotation of shrimp and fish. Low salinity of the pond fish can collection or alternate culture variety, can adjust measures to local conditions to choose the ideal type, the current in freshwater pond area or low salinity, South America white shrimp and grass carp, such as leather beard catfish collection, there are many successful examples. Even in the saltier waters, there are many successful cases of shrimp and mullet, pompons, yellowfin and blue fish. The salinity of the pond can be mixed with grouper, the cover fish and so on mix or the effect is also very ideal. The implementation of mixed breeding or rotation can reduce the pollution of the pond and repair the ecological factors of the pond, which in practice proves to be of great benefit to the reduction of shrimp disease. In the same pond, do not rebreed the same shrimp a year, can reduce the occurrence of shrimp disease.

In the whole culture, science should be fed to science, and some of them understand that the yield of prawns will be high. The main cause of the residual lures accumulated in the bottom of the pool is to destroy the bottom quality. The scientific investment feed should be based on different kinds of breeding, different growth stage, health degree, shedding shell, climate, water quality, etc. Accurate decided to vote for the feed quantity, mainly according to the feed table feeding speed and the bait, increase or decrease the feed quantity, beneficial to reduce the shrimp ponds of sediment and water body pollution, alleviate eutrophication, reduce its harmful algal blooms. Large changes in the composition of the algae groups can even change the environmental factors of the water, causing the prawns to grow ill or to develop diseases.

Added in the shrimp feed fish and shrimp auxin (CBS), EM bacteria such as the original Lou compound microbial strains in advantage, develop its synergy, such as bait, waste residue, animal and plant body affecting quality, bad hidden trouble, timely resolved can improve the sediment and water quality, and to control the spread of pathogenic microorganisms and their diseases.

4. Strengthening the storm gas to improve the environment in the bottom of the pond USES a variety of types of aerator, especially the three-dimensional oxygen is an important condition for the successful breeding of prawns. Aerator can make the water flow of shrimp ponds, prompted the decomposition of organic material in the water, the water depth deeper pond, must use submersible jet aerator, improve the shrimp ponds bottom water quality, for the bottom of the prawn to create a good ecological environment, is very important measures prawn breeding success. According to the density of prawn and the weather, water quality, and the base quality, the number and number of oxygen - increasing machines are determined. Even in the early stages of farming or in a cool climate, a partial oxygen generator is being used. Especially in rainy weather, high temperature and low pressure and sultry weather, sooner or later, must increase the number of oxygen engines and lengthen startup time.

5. According to the bottom quality and water quality of the purification of the bottom quality, the substrates are regularly or irregular in the pool, such as lime, dolomite powder and wheat rice stone. Lime can enhance the buffer effect of pool water, can adjust pH value, and can eliminate the toxic of heavy metal ions, improve the bottom quality and water quality. Zeolite powder and dolomite powder not only can buffer the acid alkalinity of water, but also have the effect of regulating total alkalinity. It is the most effective way to purify water quality and bottom quality.

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