At this stage, a lot of farmers began to plant seedlings. The following are some practical seedling methods for reference only. Observing water quality Use a beaker to make a cup of water in the nursery pool. Observe the light in the dark light. If there is a white misty feeling, do not use this kind of shrimp. Test water At present, most farmers test water by using the survival rate of the shrimp to determine whether the shrimp adapt to the water body. Due to the time constraints, the test water is mostly 24 hours. It is not scientific to determine the adaptability of shrimps to the water in such a short period of time because the survival rate is 96 hours. Therefore, it is recommended to use shrimp manure in water to determine whether the shrimp adapt to the water is more scientific, use the pond water to test the seedlings one day after the observation of water in the shrimp manure is not much, more words to explain the shrimp to eat good pull good, pond water It adapts to the life of the shrimp seedlings. On the other hand, the shrimp seedlings do not adapt well to this pond water. Intestinal judgment Use white water scoop to fill the water on the oxygenation head of the nursery pond. After standing for 30 seconds to 60 seconds, observe that there is not much feces formed on the bottom of the scoop, and the more molding feces, the more healthy the intestinal tract. Picking the seedling "Four Don't" The head seedlings do not have soft body rotation (the recovery is slow after the weak constitution). Do not swim in water scoops (weak adaptability to new environment). Do not take liver (hepatic lesions). There is no white spot on the liver. See Miao's coup When farmers look at seedlings, it will be difficult to avoid how such a small seedling may be seen clearly. In fact, only a mobile phone that can photograph can solve this problem. After photographing the shrimp with a mobile phone and then viewing it on the phone, you can continue to zoom in if you don't see it clearly. Improve survival rate (1) Select high-quality seedlings, transport time should not be too long, within 50 kilometers from the appropriate or 2 hours drive is appropriate. (2) Construct a stable early pond ecosystem, establish two food chains of algae-shrimp, and algae-plankton-shrimp, and put them back in a stable manner (about 7 days to 15 days). (3) Minimize the difference in water quality between the nursery pond and the rearing pond, mainly the differences in water temperature, pH, and salinity. (4) Successful test of water before planting seedlings. (5) When the water temperature reaches and is stable at 20°C or above, the seedlings can be released. The seedlings should be planted early or late, and aerator aeration should be started in advance. (6) Feeding should be started the next day after the seedlings are injected, and at the same time, the “Fat Harvest No. 1†should be fed for one month. Seedlings detail (1) Successful test seedlings can be planted. The test seedlings are unsuccessful. Find out the reasons, and re-optimize and cultivate the water quality of the seedlings to be released. (2) The seedlings will not be released until 2 days to 3 days or 3 days to 5 days after the water is stabilized. It is better to put the seedlings into the pool at the peak of rotifers. The specific time is affected by changes in weather, temperature, and water quality. Wait until you decide. When the water color is cultivated, it appears to be too thick, the transparency is rapidly reduced, and even the appearance of blooms can be used to purify the water using "ultra-concentrated photosynthetic bacteria" + "Harvest No. 1" to absorb excess nutrients and prevent water color. Over-concentration can also promote the rapid propagation of Cladocera and rotifers to provide timely and palatable biofeeds for shrimps. (3) Early and late release of seedlings: (especially for high temperature days) Putting seedlings before and after 10 o'clock in the morning or evening of the day in order to avoid direct sunlight, excessive light, and excessive temperature , The occurrence of stress will affect the survival rate of shrimp. (4) Upwind opening seedlings: When the seedlings are released, they must also consider the upwind outlet. It is not appropriate to put seedlings in the downwind outlet to avoid the death of the seed after sticking to the bank after the waves are patted on the shore (slope protection). (5) Bleach bag 20 minutes to 30 minutes: after the oxygen bag arrives, it can't be put in immediately. The oxygen bag will not be opened and floated on the surface of the pool. After about half an hour waiting for the water temperature inside and outside the bag to be uniform, it will be opened again. Tilting the mouth of the bag caused the shrimp to flow slowly out of the water. Shelling: There may be sporadic prawn seedlings in the seedling bag that are husked during transportation. This is a normal phenomenon of slight stress husking. In the evening, there will be concentrated husks, ponds with low salinity or groundwater, and they need to be used. "Fast supplement 100" and other trace element supplements to promote the hard shell, to prevent excessive stress and dehull damage seedlings. (6) When the salinity is too low or in fresh water, salt bags may be hung: When the seedling bags are transported to the beginning of the floating bag, they are also in the middle of one long side of the pond, or slightly near the upper tuyere, and are filled with fine sea salt (coarse sea salt) It is easy to cause salinity stratification.) The woven bag is hung on the edge of the pool. There are many small holes in the bag with a screwdriver or other objects, so that the sea salt slowly dissolves in the pool water, forming a seedling bag as the center and gradually decreasing outwards. The “salinity circle†has high salinity in the center, and the lower the salinity is, the lower the salinity is (the total dissolution has almost no effect on the overall salinity). After the end of the rinse bag, the salinity of part of the area from the inside to the outside is uniform when the water temperature is released. The circle has been formed, with the seedlings on the upwind opening, free movement with the seedlings, stress, poor adaptability, and heavy physical exertion. In this way, artificially set up a circle of salinity within a short period of time to allow the shrimp seedlings to freely find suitable salt. Circles to improve survival. VTM sampling kits are designed for the collection, preservation, and transport of viruses, chlamydia, mycoplasma, and ureaplasma urea. They are now widely used for sampling and transporting prior to virus detection. MandeLab's VTM kits provide a safe and convenient way to collect and transport virus samples. Nasal swab kit virus sampling tube,Used to collect samples of secretions from the throat or nasal cavity, Disposable Jiangsu iiLO Biotechnology Co., Ltd. , https://www.sjiilogene.com