At present, it is the stage of stocking of seedlings for industrial breeding. Because the seedlings have poor resistance to tender skin, if they are not carefully handled during the stocking, they will induce explosive diseases and bring losses to the breeding. . To this end, introduce the technical points of seedling stocking for reference applications.
I. Preparation for stocking
How to prepare for various preparations before stocking is a key measure for safe and smooth stocking of seedlings. The preparation work includes cleaning and disinfection of the Dianchi Lake in the greenhouse, and the general environment can be sprayed and disinfected according to the instructions. Dianchi will be disinfected with bleaching powder of 20PPM concentration on the basis of rinsing. In addition, there are a variety of equipment maintenance, such as the injection and drainage system, aeration system, escape prevention facilities, power supply systems and other equipment. Must be fully repaired before restocking and retesting until completely normal. In addition, facilities such as insulation and leak-proof ventilation in the whole greenhouse should also be overhauled. It should never be repaired after stocking. This will affect the normal breeding of earthworms. After the above work is done, cloth the food stand, drying back bench and note the set water level in the Dianchi Lake to wait for the stocking.
Second, the quality of good seedlings
The selection of healthy and normal seedlings is the basis for raising the survival of the culture. In some places, the seedlings were stocked regardless of their superiority and inferiority, resulting in the consequences of poor survival, poor growth, and wide-ranging specifications. So pick the seedlings to make the following points. First, the specifications are neat, and generally require an average specification of 3.5 grams or more, and the size difference should not exceed 0.5-1 grams. It is best not to exceed 3 days before or after hatching. The second is the requirement that the seedlings have complete body shape, no disease, no injuries, and strong vigor and quick response. Third, try not to raise overseas seedlings without customs inspections.
Third, do a good job carcass disinfection
Disinfection of seedlings before stocking is an important measure to prevent the occurrence of diseases. Disinfecting drugs are best selected for drugs that are less irritating, have good antiseptic effect, and have a fast acting time. They should not use irritating oxidants and some antibiotics that are prone to drug resistance. Now introduced with 2% saline, this drug can both protect the skin and kill fungi and bacteria on the body surface of the seedlings. It is also cheap and easy to purchase. Disinfection method is to soak the seedlings for 10 minutes. When soaking, it is best to use plastic pots with no dead corners. It is not necessary to soak the potions.
Fourth, pay attention to eating in time
Seedlings should eat in time after stocking. The market may be marketed with juvenile feed. It is best to add 10-15% of fresh brew or egg yolk in the first-time feed. The amount of feed should be 4% of body weight. In the past, eating more concentrated in plastic bowls and eating, this method seems to be easy to damage the body. Now it will be changed to first disinfecting and stocking directly in the pool with palatable pellet feed. This will not only reduce carcass damage but also allow the seedlings to eat early in the pool, early adaptation, early growth. The method is to sprinkle quantitative diet on the table after stocking.
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