In the past two years, mud prices have been rising steadily in various markets, and muddy fish farmers have also increased. For old and new farmers, mud loach breeding and feeding of loach seedlings are the most critical issues. Loach seedlings are generally released during the equinox to trough, and the freshly-grown loach seedlings are delicate. When they enter the pond, they do not pay much attention, and they may cause large losses. They may even be “annihilatedâ€. Therefore, when the loach seedlings enter the pool, they must Pay attention to the following points.
I. Thoroughly remove phytotoxicity and predators.
Muddy seedlings must use a dense mesh to pull empty ponds several times before entering the pond. On the one hand, the remaining clear ponds accumulated in the bottom of the pool of drugs to fully dissolve, to prevent poisoning seedlings; on the other hand to further eliminate the enemy, if they find the enemy can be used 0.5 grams / cubic meter concentration of trichlorfon Quanchiposa to kill .
Second, after the clear pond to test the effect of clear pond.
Before the muddy seedlings enter the pool, check whether the drug toxicity of the clear pond disappears and whether the water's fatness is appropriate. First of all, half a barrel of water is used at the bottom of the pond. Because the toxicity of the surface water has sometimes disappeared, the virulence of the bottom layer is still very strong. Put the muddy seedlings into the water for 8 to 10 hours to see if it is normal to determine whether the muddy seedlings can enter the water. Pool. Secondly, the water's fatness can be judged according to the water color, transparency, and the biological condition of the fish. If the pool water is found to be too fat, the water can be adjusted and adjusted; the water of the pool water is not enough, and a small amount of chemical fertilizer or fermented dung should be added immediately or increased. Food.
Third, adjust the temperature difference, do a good seedling treatment.
When the muddy seedlings enter the pool, the difference between the temperature of the pool water and the temperature of the fish transportation water must not be 3°C. If the water temperature difference is too large, you should gradually adjust the temperature difference, muddy seedlings adapted to enter the pool. For muddy seedlings transported in plastic bags, the opening of the plastic bag should be slowly put into the pre-placed water tank before entering the pool. After 10 to 20 minutes, the muddy seedlings and water are slowly poured into the box, thereby regulating the water. The temperature difference and the adaptation of the loach seedlings to the change of air pressure inside the bag are called “slow seedlingsâ€. If the loach seedlings are found to be in a supine state when the bag is opened, this is a phenomenon of carbon dioxide poisoning. As long as the seedlings are put into the water, they can be restored after a period of time. If the muddy seedlings are directly poured into the pool from the bag, even if the naked eye observes normal life when stocking, death will occur after the lower pond, that is, it will die after transportation. Therefore, seedling treatment is an essential and important step. In addition, the muddy seedlings should be disinfected before entering the pool. Can be soaked in 1% baking soda for 20 to 30 minutes.
Fourth, the individual size should be basically divided after feeding the lower pond.
The production practice of seedling rearing shows that if the seedlings are fed with 1-2 cooked egg yolks or feed yeast before entering the pond, it would be more desirable if the rotifers could be fed. The survival rate or growth rate of the seedlings was significantly higher than that of non-feeding. After the seedlings arrive, feed them with cages and re-enter the pool. When taking the seedlings in the cage, the seedlings in the upper head usually have stronger constitution and the individuals are larger. The seedlings in the downcast seedlings are of poorer constitution and the individuals are smaller, so that the individual size can be different and the constitution is different. The seedlings are basically separated so as to prevent the seedlings with large individuals and strong constitutions from crowding out the seedlings with small individuals and weak constitutions during the breeding process, and gradually form size and differentiation.
Fifth, choose no wind and sunny days, deep water veneer put seedlings.
According to experiments, the seedlings are poured into the water from a height of 30 cm, only 5-10% of the damage; at a height of 60 cm above the water, the damage rate of the fry can reach 20-30%. Therefore, the seedlings should be selected in the deep water at the lower pond. Keep the seedlings close to the surface of the water. If the seedlings are found to be densely integrated, they should be splashed with water droplets to spread them into the pool. When it comes to windy weather, it is necessary to enter the pond in the deep waters of the upper winds to prevent the seedlings from being blown to the pool slope or to the bottom of the pool and causing casualties.
Six, stocking specifications as consistent as possible.
The same pond should be stocked with the same seedlings of the same specifications. Try to put in enough time to avoid the occurrence of large fish and small fish out of specifications. The seedlings with inconsistent specifications are stocked together. The growth rate of big seedlings is much faster than that of young seedlings, and polarization is even more pronounced. In addition, the timing of the seedlings in the lower pond is not clear on a sunny day. Avoid wind, rain or night swimming.
High Precision Distance Sensor
Laser range sensors combine the advantages of a visible red sensing beam with the increased range of a laser. The optical distance sensor devices are Class 2 lasers, support Class 1 customized. The high precision autonics distance sensor is successfully be used to connect to Arduino, Raspberry Pi, with +-1mm to 3mm high accuray, and long-range solutions (max up to 150m) for your application.
Precision Distance Sensor,Precision Laser Distance Sensor ,Precision Distance Sensor Laser,Accurate Laser Distance Sensor
Chengdu JRT Meter Technology Co., Ltd , https://www.cdtoflidarsensor.com