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1.Pond requirements.
Green shrimp have high oxygen consumption and are not tolerant to low oxygen. Green shrimp are benthic animals with poor swimming ability and prefer to move at the bottom of the pool. Therefore, the area of the pond where the shrimp are cultured should not be too large.
The area of the shrimp pond is generally 3-8 acres, and the slope ratio is 1:3-1: the water depth is about meters.
There is no silt at the bottom of the pond, and the water source is pollution-free, which meets the national fishery water standards. Half a month before the release, the ponds were thoroughly disinfected with quicklime, and aeration facilities were installed in each pond.
2.Grow aquatic plants and algae.
Green shrimp are crustaceans that shed their shells and cripple each other. Planting aquatic weeds can not only provide food for the shrimp, but also provide a safe place for the shrimp to hide from their shells, and also avoid the phenomenon of shrimp cannibalism. Generally, there are two kinds of aquatic plants, one is the water peanut planted around the shallow water zone at the edge of the pond, and the other is the submerged plant planted at the bottom of the pond in the shallow water zone, such as black algae, elophysis, etc.
The proportion of aquatic weeds in the total area of the pond should generally be controlled at about 30%.
3.Set up the mesh.
In the middle of the shrimp pond, 10-33 mesh unknotted summer flower mesh is fixed with bamboo strips, set up 20-40 cm below the water surface according to the roof truss shape, and the slope is 15-20 degrees, so that the shrimp can crawl up and down, each row of mesh is 3 4 meters wide, the length depends on the length of the pond, and generally 5 acres can be set up with 2 rows of mesh.
4.Seedlings are released. Green shrimp grow fast and have a short breeding cycle.
Under the conditions of suitable breeding environment and sufficient feed, after 2 months of breeding, each tail can reach more than 3 grams of commercial specifications. Therefore, the spring and summer breeding mode can be adopted, twice in spring and summer, and double seasons in a year. Summer stocking takes place around July, with 40,000 to 60,000 shrimp fry per acre, followed by a small number of carp fingerlings after 10 to 20 days.
When the stocking requirements are neat and strong, they should be stocked in the early morning on a sunny day or when the cloudy day is not hot, and the peak period of seedling pulling should be avoided during the stocking period. From August to September, there will also be a batch of shrimp seedlings to spawn and hatch, and by the end of the year, they can generally grow 2 3 cm, which can be used as spring seedlings, generally 30,000 to 50,000 seedlings per mu.
5.Feeding amount and feeding time.
Feeding is generally carried out twice a day at 8-9 a.m. and 5-7 p.m., feeding 1 3 of the total diet in the morning and 2 3 in the afternoonThe feed should be evenly sprinkled in shallow water with aquatic weeds.
The insulation of Feilong greenhouse was wonderfully shared by the manufacturer.
6.Ensure clean water quality.
In the hot season, you have to add or change water once a week, first put out the old water from the bottom, and then add 15-20 cm of new water. If you find a shrimp floating head at night or early in the morning, it means that the water body is hypoxic, and you need to turn on the aerator in time and inject new water in time, especially in the weather before the extreme heat or thunderstorm, take measures to add water and change the water, and keep the pool water flowing lightly 24 hours a day. Disinfect with quicklime water every half a month to detect pests and diseases in time.
7.Catch and market at the right time.
Green shrimp can be caught and marketed when they grow to 4-5 cm. Generally, spring seedlings are caught and marketed from May and July, and summer seedlings are caught and marketed from September and November.
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Does the rain on the next day have an effect on my vision? After a day of starvation, 24 hours have passed, and it shouldn't have much effect.
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1.For agriculture, this strikes.
Proper rain is good for the growth of crops.
2.For those who work outside the household, zhi delays work.
3.For the traffic dao access road, it causes traffic congestion on the road, which is not conducive to travel. It will flood some low-lying places.
4.will delay the normal departure time of the aircraft, resulting in a delay in the aircraft5Provide the necessary water to the plants, alleviate the drought, purify the air, and maintain the humidity of the air.
6.Natural disasters such as floods and mudslides endanger human life safety and economic losses.
7.Impact on tourism.
Rain is a natural sight in which water on Earth is exposed to sunlight and evaporates into the air as water vapor. When water vapour meets cold air at high altitude, it condenses into small water droplets. These small droplets are small, with a diameter of only millimeters and a maximum of millimeters.
They are small and light, held in the air by updrafts in the air. It was these small droplets of water that gathered together in the air to form clouds. For these small droplets to fall to the ground as raindrops, they would have to increase in size by more than 1 million times.
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Indoor workers have no impact, outdoor workers have a big impact, indoor workers have no impact, outdoor workers have a big impact, indoor workers have no impact, outdoor workers have a big impact.
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The temperature of the eye day bar is high, and it is really unpleasant to make people sweat profusely, although the temperature will be low on a cloudy day, but it is easy to make people feel breathless, that is.
A: Cool clothes are not easy to dry, let alone rainy days, travel with umbrellas, can't get shoes and have to be dirty, in short, sunny and cloudy days and rainy days have their own impact on our lives.
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If the weather is bad, then people's mood may be affected, especially outdoor activity workers
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Working indoors has little effect, but it has a big impact on working outdoors.
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This is a matter of different situations. What is our profession? Where is the workplace? Indoor or outdoor.
There is also the first industry, what position it will be related!
What is the personality? Physical condition will have a different impact.
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Some crystal plating has nano curing agent, which has little effect on rain. If there is no nano curing agent, it needs to be re-plated.
Hazards of automotive crystal plating:
Automotive crystal plating will make your car's paint saturated with luster for a long time, eliminating the hassle of frequent waxing.
The disadvantage is that it will destroy the paint, and the paint needs to be polished before crystal plating, and the polishing process is to smooth the paint, since it is grinding, it will make the paint thinner (irreversible) and the paint itself is not thick.
And crystal plating, glazing these will make the car dependent, although the crystal plating is maintained for a long time, but it is only 1 year, 1 year of time, your car will become dull, how you wash can not restore the luster, at this time you must plating again. And so on and so forth. That's dependency.
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Answer: The surface of the car is drenched by the rain after 48 hours of crystal plating, it will generally not have any effect, as long as the moisture on the surface of the car is dried in time, and the rider does not have to worry too much. You can use a dry towel to dry the moisture on the surface of the car, pay attention to drying, not wiping, because this may cause damage to the surface of the newly plated crystal.
And if the water has dried up, you have to ask the crystal plating master, and they generally have a way to solve it. And if it rains the next day or a week after plating, don't drive, because the surface of the plating will be washed away by strong water flow. It is worth noting that the car should not touch the paint surface after the crystal plating is completed to avoid affecting the final crystal plating effect, because the crystal plating agent needs to be fully combined with the body paint after 24 hours.
Do not rinse the car for a week after plating, as it will take at least a week for the surface to form the final protective layer of the paint crystal. In addition, after 4 to 6 months of crystal plating, car lovers can go to the car beauty shop for paint mirror restoration and repair. This allows for better crystal plating and longer retention of the lacquer surface.
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Ecological restorer, water diversion and bottoming, the water quality became clear in two days, and the effect was very good.
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No, the pH value of the water in the fish pond is certain, and the quicklime will be alkaline when you run out, which is not suitable for farming.
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Generally, the toxicity disappears about a week after the pond is cleared. The trimmed and renovated ponds should be disinfected with drugs. Commonly used disinfection drugs include bleaching powder, Qingtangling, quicklime, etc., among which quicklime has the best disinfection effect.
Pond disinfection should be carried out on sunny days, the water depth of the pond should be kept at about 10 cm, and 50 80 kg of water per mu should be sprinkled on the whole pond.
After a period of fish rearing, a thick layer of silt gradually forms at the bottom of the pond, which is formed by the continuous deposition of residual feed, fertilizer, fish manure and dead organisms, which is mixed with the sediment at the bottom of the pond. There is a certain amount of silt in the pond, and the pond water is easy to become fertilized, which is conducive to fish farming and high yield. However, too much silt can deteriorate water quality, affect the growth of fish, and even cause fish death.
Therefore, excessive silt must be removed in time to maintain good water quality.
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There are fish in the fish pond, which cannot be disinfected with quicklime. Quicklime dissolves in water, will produce strong alkali and strong calcium oxide, and will release a lot of heat, so fish will inevitably die in large numbers.
Question: Can I release fish after draining the lime water and soaking it in water for a few days?
A fishpond is a place where fish are fished or raised, and the inner compartment of the fish pond or the purse seine net that encloses the fish. Generally, the ideal pond requires a large area, deep pond water, sufficient sunlight, unimpeded water source, fertile water quality, and convenient transportation, so as to facilitate the growth of fish and the improvement of production, and is conducive to production management.
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It takes 24 hours for the water to be released.
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Lime and limestone are used in large quantities as building materials and are also important raw materials for many industries. Limestone can be processed directly into stone and fired into quicklime. Lime has quicklime and hydrated lime.
The main component of quicklime is CAO, which is generally lumpy, pure white, and light gray or light yellow when containing impurities. Quicklime absorbs moisture or adds water to become slaked lime, which is also called slaked lime, and its main component is Ca(OH).
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Lime painted walls do not have any smell and are very environmentally friendly. Lime stucco wall pollution-free, it is more in line with environmental protection requirements than putty paste and latex paint mixed with chemical ingredients, but the effect is not as good as paint, because it does not contain glue, the stain can not be wiped and the color and fineness are not as good as latex paint and wall paint. However, in addition to scrubbing the stain with a damp cloth, the texture and overall effect of the hand touch are more delicate, smooth, and three-dimensional, and more durable than ordinary wall paint, and good wall paint is generally no problem for ten years.
1. Major inspection. Cement wall, check whether the cement wall that needs to be painted in the blank room is strong and smooth. Putty wall, it is important to check whether the wall putty is qualified water-resistant putty, if not, it must be shoveled and redone water-resistant putty.
2. Finished product protection. There will be dust when repairing the wall, and it is inevitable that putty, paint or other glue will be spilled, so it is important to protect the finished decoration products that already exist in the room in advance.
3. Preparation before scraping putty. Ensure that the wall is solid and flat, and brush the wall with a brush or other utensils, so that the cement wall is as free of floating soil and dust as possible.
4. Scrape putty. Generally, the wall can be scraped twice with putty, which can not only be flattened, but also cover the background color. If the flatness is low, the putty needs to be scraped several times in individual parts. If the flatness is very poor and the wall is seriously tilted, you can scrape the plaster first to flatten, and then scrape the putty.
5. Polishing putty. Water-resistant putty becomes particularly solid when all the strength is applied, and it becomes particularly difficult to polish it again. Therefore, it is recommended to start putty sanding 1-2 days after scraping the putty.
6. Brush the primer. After cleaning the floating dust on the surface of the sanded putty, you can apply the primer. The primer is applied once and must be even.
1. Paint and decorate the newly brushed paper mortar wall, and wait until the outer layer of lime is all dry, otherwise it will cause spots on the wall and affect the beautification effect.
2. When painting new colors on dark old lime walls, including walls with more spots, you should first brush them with white ash water, and then paint them with fresh colors after they are dry and white.
3. If the lime wall has not been painted for more than half a year, Cato acidic color drywall powder, such as fruit green, sky blue and other colors, is easy to produce neutralization and overcoloring, so you need to pay attention.
4. In the process of brushing lime slurry, the lime slurry should be stirred continuously, otherwise, the lime slurry will precipitate, and stripes of different shades will appear on the wall after brushing.
5. When painting, you should master the rules of brushing from top to bottom, one stroke at a time, and vertical brushing, and you can also brush horizontally from left to right, but you should be careful and must not miss the pen.
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If it is brushed with lime water, there is no problem, don't worry, a little smell will not cause harm to the human body, and ventilation can be eliminated.
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What age is it still used to use stone water, there can be no more environmentally friendly material than this, there is no chemical material at all, lime water only absorbs carbon dioxide and produces water during the solidification period.
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It's best not to stay at first, the children are the most important.
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Quicklime can play a certain role in increasing the pH value of the water body, improving the water quality, and promoting the reproduction of algae, but in the current marine aquaculture process, quicklime is often used, sterilization and disinfection, and the pH value is adjusted. Improper dosage and incorrect use can be harmful. In general, it is necessary to pay attention to the following two situations: quicklime is prohibited.
1).Water bodies with abundant algae and high pH value often cause alkalosis or a large number of algae death after use, which will cause water quality deterioration and crab and shrimp death. (2).
Water odor is prohibited, water odor often has a large amount of ammonia nitrogen substances, quicklime use after the rapid increase of pH value, will cause a rapid increase in molecular nitrogen, toxicity is hundreds of times the original, causing ammonia poisoning, normal selection can be after the rain on a sunny day, morning or 2 o'clock in the afternoon splashing, per mu of water depth 1 meter dosage does not exceed 5 kg, can adjust the pH value.
The water in the thermos pot is not drinkable the next day because the overnight boiled water contains nitrite. Some experts have found that the nitrite content in boiled water is higher than that in raw water. Moreover, the nitrite content of boiling water that has been boiled for too long or more than 24 hours has been boiled for many times.
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