Preparation of shrimp and crab mixed breeds before stocking
After the beginning of spring, with the continuous increase of temperature, shrimp aquaculture will enter the production season, so it is very important to prepare the seedlings for stocking. The main points are as follows: 1. Substrate treatment. After the cultivation in the previous year, the pool water was drained. The bottom of the pool is exposed to a cold winter exposure. In the early spring season, bulldozers are used to remove excess silt on the surface. When there is little silt, the bottom can be deep plowed in the spring. 2. Clear pond disinfection. Forty days prior to planting, bleaching powder or quicklime ponds were used for disinfection. After 24 hours, the pond water was discharged, and natural seawater filtered by a 80 mesh sieve was added to prevent entry of predatory organisms and their eggs and larvae. 3. The establishment of a holding area. The shrimp and crab polyculture pool is preceded by a 20 to 40-mesh snaking net and forms a holding area of ​​about 10% of the total pool on the side of the intake of the shrimp pond. The crabs are raised for 10 to 15 days, which facilitates centralized feeding and enables the survival rate of crab seedlings to be known in a timely manner. 4. The cultivation of food organisms. About 30 days before planting, the ponds were filled with water to 50-60 cm, and 4 to 5 kg of ammonia fertilizer and 1 to 2.5 kg of superphosphate or Feishuibao were applied per acre. After the stocking of shrimps, the peanuts can be poured over the pool and the pods can be fed with fertilizer. Adult diapers are disposable urinary incontinence products, one of the adult care products, and a disposable diaper mainly suitable for incontinent adults. Bariatric Diapers,Adult Diapers Target,Medical Diapers For Adults,Medical Diapers For Adults Shandong Kangshun Daily Products Co., Ltd , https://www.centurybenifit.com
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