CN105706996A - Desilting method for aquaculture pond organisms - Google Patents

Abstract

The invention discloses a method for biological dredging of a culture pond, which comprises the following steps: when the water level of the culture pond reaches 100 cm, 100 silver carp and bighead carp with a specification of 500 grams and 100 bighead carp with a specification of 30 grams are put in per mu. 200 carp, 800 crucian carp with a specification of 30 grams; mix Bacillus subtilis, yeast, and photosynthetic bacteria in a volume ratio of 1?3:1?2:1?3 to form a mixed bacterial liquid, and put it in To the aquaculture water body, the dosage is 0.1‰ to 0.2‰ of the volume of the aquaculture water body. Before each time the bacterial solution is used to treat the water quality, the water quality TN, TP and COD indicators are measured, and the time for continuous injection of the mixed bacterial solution to treat the aquaculture water body is determined according to the monitoring results. The invention thoroughly desilts, realizes water-saving breeding, increases the effective biomass of the breeding water area, improves economic benefits, increases the output by 50%, reduces the bait coefficient, saves the breeding cost, and reduces the occurrence of diseases.

Description

A method for biological dredging of aquaculture ponds

technical field

The invention relates to the field of dredging ponds, in particular to a biological dredging method for ponds.

Background technique

At present, the phenomenon of eutrophication in pond aquaculture water is common in our country. Excessive silt, foul smell, excessive reproduction of harmful algae, and decline in biodiversity seriously threaten the health of fish and affect the yield and quality of fish. In recent years, although measures such as various microorganisms and bottom sewage have been used in aquaculture water bodies to improve water quality, from the perspective of eutrophication, the nutrient status index of water bodies has not declined compared to before. It can be seen that once the aquaculture water body becomes eutrophic, it is difficult to completely recover.

Elimination of nitrogen, phosphorus and organic loads in the water body of aquaculture ponds can fundamentally solve the eutrophication of the water body. At present, physical, chemical, biological methods or a combination of these methods are commonly used at home and abroad to deal with endogenous pollution. The method of bottom sewage discharge requires a large amount of water resources to be replenished. In the west of China, water resources are seriously lacking; the cost of mechanical dredging is too high, and it can only delay the prevention of eutrophication in water bodies, and cannot fundamentally solve the problem of aquaculture. Pond water quality is gradually deteriorating. Due to the low cost and no secondary pollution, the method of microbial treatment is a commonly used method in aquaculture ponds. However, the daily feeding amount of aquaculture ponds is large, the waste excreted by fish is large, and there are many other influencing factors. The treatment method cannot carried out under human control.

At present, some people use several commonly used microorganisms to purify aquaculture water, and control the overgrowth of algae and eliminate sediment through the absorption and utilization of certain or several organic pollutants that cause eutrophication. The degradation rate is far less than the feces discharged by farmed organisms every day. In the Chinese Patent Bulletin, an invention of "a method for effectively controlling algae blooms by using microorganisms" was disclosed. Its application number is 201110021920.8. Mixed in proportion and put into the culture pond, the removal rate of each pollutant in the culture pond water body is respectively: TN is 83.1%, TP is 92.1%, COD is 79.1%, Chla is 90.1%, but in the dredging of intensive culture pond The speed is still slow. .

Contents of the invention

In order to solve the above problems, the invention provides a method for biological dredging of aquaculture ponds, utilizing microorganisms and benthic fish provided by Sichuan Huateng Water Production Technology Development Co., Ltd. for dredging ponds, which can overcome the above-mentioned problems. Disadvantages, it is more suitable for dredging ponds.

In order to achieve the above object, the technical scheme that the present invention takes is:

A method for biological dredging of breeding ponds, comprising the steps of:

S1, when the water level of the breeding pond reaches 100cm, put in 100 tails of silver carp and bighead carp with a specification of 500 grams per mu, 200 tails of carp with a specification of 30 grams, and 800 tails of crucian carp with a specification of 30 grams;

S2. Mix Bacillus subtilis, saccharomyces, and photosynthetic bacteria liquid bacteria liquid in a volume ratio of 1-3:1-2:1-3 to form a mixed bacterial liquid, and put it into the aquaculture water body, and the amount of input is 1/2 of the volume of the aquaculture water body 0.1‰-0.2‰, among them, when the water temperature is 20°C-25°C, the mixed bacterial solution is added once every 15 days, and the dosage is 0.2‰ of the volume of the aquaculture water body, and the mixed bacterial solution is added once every 7 days when the water temperature is above 25°C , the dosage is 0.1‰ of the volume of the aquaculture water body. Before each time the bacterial solution is used to treat the water quality, the water quality TN, TP and COD indicators are measured. According to the monitoring results, the time for continuous injection of the mixed bacterial solution to treat the aquaculture water body is determined.

The present invention has the following beneficial effects:

1. Thorough dredging. Using several kinds of bacterial mixture, filter-feeding fish and benthic fish, after 10-12 months, the pond silt is reduced from 50-110cm to below 20cm, or even no silt, which saves the cost of mechanical dredging.

Water-saving farming has been realized. In one breeding cycle, when the water temperature does not exceed 25°C, the breeding mode of only water intake and no drainage is realized. In the high temperature season, the water is changed every 20 days, and the water change volume is only 10%. Even in water-scarce areas in western my country, high yields can be achieved.

The effective biomass of the breeding water area is increased, and the economic benefit is improved. The silt is too thick, the pond is aging, the water level of the culture drops, and the unit output of fish decreases. Through biological dredging, the output can be increased by 50%.

Reduced bait coefficient. In the common breeding mode, the bait coefficient of 3 ⁺ grass carp is usually 2.3-2.5. With this breeding mode, the bait coefficient can reach 2.0, which saves the cost of breeding and increases the fish output.

Reduced disease occurrence. In the common farming mode, hepatobiliary syndrome of fish is very common, and it is very common to overturn ponds every year due to hepatobiliary syndrome and water quality deterioration. After dredging with microorganisms, filter-feeding fish and benthic fish, the number of fish deaths will not exceed 1‰ even if the fish suffers from severe head floating.

The water quality has been improved, reducing the amount of water transfer medicine used in aquaculture waters. The pond silt is thick, the content of ammonia nitrogen and hydrogen sulfide in the pond exceeds the standard, and chemicals are commonly used, causing secondary pollution of water quality.

detailed description

In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example 1

S1. When the water level of the breeding pond reaches 100cm, put 100 silver carp and bighead carp with a size of 500 grams per mu, 200 carp with a size of 30 grams, and 800 crucian carp with a size of 30 grams; The specification is 150 grass carp of 500 grams; the feeding amount is calculated according to the weight of grass carp.

1. Mix Bacillus subtilis, saccharomyces, and photosynthetic bacteria liquid bacteria liquid in a volume ratio of 1:1:1 to form a mixed bacterial liquid, and put it into the aquaculture water body, and the dosage is 0.1‰-0.2‰ of the volume of the aquaculture water body, wherein , the water temperature is 20°C-25°C, the mixed bacterial solution is put in once every 15 days, and the amount is 0.2‰ of the volume of the aquaculture water body, and the mixed bacterial solution is put in once every 7 days when the water temperature is above 25°C. The 0.1‰ of the 0.1‰, after each time the bacteria solution is used to treat the water quality, the water quality TN, TP and COD indicators are measured, and the time for continuous injection of the mixed bacteria solution to treat the aquaculture water is determined according to the monitoring results.

Example 2

S1. When the water level of the breeding pond reaches 100cm, put 100 silver carp and bighead carp with a size of 500 grams per mu, 200 carp with a size of 30 grams, and 800 crucian carp with a size of 30 grams; The specification is 150 grass carp of 500 grams; the feeding amount is calculated according to the weight of grass carp.

1. Mix Bacillus subtilis, saccharomyces, and photosynthetic bacteria liquid bacteria liquid in a volume ratio of 3:2:3 to form a mixed bacterial liquid, and put it into the aquaculture water body, and the dosage is 0.1‰-0.2‰ of the volume of the aquaculture water body, wherein , the water temperature is 20°C-25°C, the mixed bacterial solution is put in once every 15 days, and the amount is 0.2‰ of the volume of the aquaculture water body, and the mixed bacterial solution is put in once every 7 days when the water temperature is above 25°C. The 0.1‰ of the 0.1‰, after each time the bacteria solution is used to treat the water quality, the water quality TN, TP and COD indicators are measured, and the time for continuous injection of the mixed bacteria solution to treat the aquaculture water is determined according to the monitoring results.

Example 3

S1. When the water level of the breeding pond reaches 100cm, put 100 silver carp and bighead carp with a size of 500 grams per mu, 200 carp with a size of 30 grams, and 800 crucian carp with a size of 30 grams; The specification is 150 grass carp of 500 grams; the feeding amount is calculated according to the weight of grass carp.

1. Mix Bacillus subtilis, saccharomyces, and photosynthetic bacteria liquid bacteria liquid in a volume ratio of 2:1.5:2 to form a mixed bacterial liquid, and put it into the aquaculture water body, and the dosage is 0.1‰-0.2‰ of the volume of the aquaculture water body, wherein , the water temperature is 20°C-25°C, the mixed bacterial solution is put in once every 15 days, and the amount is 0.2‰ of the volume of the aquaculture water body, and the mixed bacterial solution is put in once every 7 days when the water temperature is above 25°C. 0.1‰ of the 0.1‰, after each time before putting in the bacterial solution to treat the water quality, measure the water quality TN, TP and COD indicators, determine according to the monitoring results that the time for continuous feeding of the mixed bacterial solution to treat the aquaculture water is 10-12 months, after testing, the above-mentioned embodiment 1 In -3, the pond silt is reduced from 50-110cm to below 20cm, or even no silt, which saves the cost of mechanical dredging. In one breeding cycle, when the water temperature does not exceed 25°C, the breeding mode of only water intake and no drainage is realized. At the same time, in the high temperature season, the water is changed every 20 days, and the water change volume is only 10%. Even in areas where water is scarce in western my country, it is possible to achieve a yield of 1,500 kg per mu, and the yield can be increased by 50%; the bait coefficient can reach 2.0, which saves the cost of breeding and increases the production of fish. The number will not exceed 1‰; the water quality is good.

Example 4

S1. When the water level of the breeding pond reaches 100cm, put 100 silver carp and bighead carp with a size of 500 grams per mu, 200 carp with a size of 30 grams, and 800 crucian carp with a size of 30 grams; The specification is 2000 grass carp with 50 grams; the amount of feeding is calculated according to the weight of grass carp.

1. Mix Bacillus subtilis, saccharomyces, and photosynthetic bacteria liquid bacteria liquid in a volume ratio of 1-3:1-2:1-3 to form a mixed bacterial liquid, and put it into the aquaculture water body, and the amount of input is 0.1% of the volume of the aquaculture water body. ‰, in the future, measure the TN, TP, and COD indicators of the water quality before each time the bacterial solution is used to treat the water quality, and determine the time for continuous injection of the mixed bacterial solution to treat the aquaculture water according to the monitoring results. The water temperature is 20°C-25°C, and the mixed bacterial solution is put in once every 15 days, and the amount is 0.2‰ of the volume of the aquaculture water body. The water temperature is above 25°C. 0.1‰.

After 10-12 months, after testing, the pond silt in the above embodiment is reduced from 50-110cm to below 20cm, even without silt, which saves the cost of mechanical dredging. In one breeding cycle, when the water temperature does not exceed 25°C, the breeding mode of only water intake and no drainage is realized. At the same time, in the high temperature season, the water is changed every 20 days, and the water change volume is only 10%. Even in areas where water is scarce in western my country, the yield per mu can be 2,000 kg, and the yield can be increased by 50%; the feed coefficient can reach 1.4, which saves the cost of breeding and increases the production of fish. The "four new diseases" of grass carp do not appear, and the survival rate of grass carp Up to 99%; the water quality is better.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (1)

1. A method for biological dredging of a breeding pond is characterized in that, comprising the steps: S1, when the water level of the breeding pond reaches 100cm, put in 100 tails of silver carp and bighead carp with a specification of 500 grams per mu, 200 tails of carp with a specification of 30 grams, and 800 tails of crucian carp with a specification of 30 grams; S2. Mix Bacillus subtilis, saccharomyces, and photosynthetic bacteria liquid bacteria liquid in a volume ratio of 1-3:1-2:1-3 to form a mixed bacterial liquid, and put it into the aquaculture water body, and the amount of input is 1/2 of the volume of the aquaculture water body 0.1‰-0.2‰, among them, when the water temperature is 20°C-25°C, the mixed bacterial solution is added once every 15 days, and the dosage is 0.2‰ of the volume of the aquaculture water body, and the mixed bacterial solution is added once every 7 days when the water temperature is above 25°C , the dosage is 0.1‰ of the volume of the aquaculture water body. Before each time the bacterial solution is used to treat the water quality, the water quality TN, TP and COD indicators are measured. According to the monitoring results, the time for continuous injection of the mixed bacterial solution to treat the aquaculture water body is determined.