Pond conditions
Since the breeding of green prawn seed generally can be cultivated about 2 centimeters per acre seedlings 3 million to 4 million tail, farmers can determine the area according to demand, choose 1 acre ~ 3 acres of ponds, require a pond mud 15 cm below the pool 1.5 meters deep, the pond water supply and drainage system is perfect, the water source conditions are good, and the water quality is pollution-free.
Ready to work
1. Clear pond thoroughly. Breeding is usually done at the end of May, so the ponds should be disinfected by the end of April and early May. The pool water will be discharged to 10 cm to 20 cm, and the quicklime will be used to clear the pond. The amount of 150-200 kg per mu shall be used to spray evenly.
2. Planting aquatic plants. After 7 days to 10 days of clear ponds, the best way to transplant plants is to use Hydrilla verticillus. This grass is easy to survive and grow faster, forming lychee to inhabit nestlings. In order to make aquatic plants grow faster, organic fertilizers can be applied in small amounts. After the aquatic animals are in groups, they can put eggs in shrimp. 3. Disinfect the insecticide before it is released. Before the eggs are held, they must be treated as if they are in the pool. The fish should be used 4 to 5 days before the release of fish to kill the stars and other small pungent insecticides to kill large branches, water spiders and other aquatic species in the water. Insects, while adding water to 50 cm to 60 cm.
Put egg shrimp
After the disappearance of the potency of the water pool, the egg-bearing shrimps should be placed at a rate of 8 to 10 kilograms per mu. In order to facilitate the observation of the development of fertilized eggs, cages ranging from 1m to 2.2m can be set up from 3 to 4 in the corner of the pond. Each cage is placed around 50 eggs, and the color of the fertilized eggs is observed every day. When the fertilized eggs are changed When it becomes purple and appears eye-points, ripening organic fertilizer should be piled up in the corners of the pond. Chicken, duck, and cow dung should be used as appropriate to cultivate palatine bait in the pond so that the broken larvae of the membrane can obtain open bait. The egg-bearing shrimp should be fed 1 kilogram to 2 kilograms of chopped small trash fish daily during the pool.
Daily management
1. Feeding. After the fertilized eggs of the egg-feeding shrimps are released from the film, the soybean milk is fed into the pond, and 1 kilogram of soya bean is ground into the soybean milk per acre per day, and the water conditions and the weather of the pond are added and subtracted as appropriate.
2. Management. During the larva rearing period, probiotics such as EM progenitors and photosynthetic bacteria should be applied once a week to improve water quality and supplement palatability feeds. Lime is applied every 10 days to regulate water quality and supplement calcium source. The dosage is 15 kg per mu of water at 1 meter, so that the pH of the pool water is between 7 and 8.
3. Monitor the water quality daily. Daily measurement of dissolved oxygen, pH value, ammonia nitrogen, nitrite, etc. is performed according to the measurement conditions.
4. Add new water in a timely manner. In the development of shrimp breeding, it is necessary to effectively shut down the water. The water inlet and outlet shall be filtered with a 60-mesh gauze to prevent wild fish or fish eggs and other aquatic animals from flowing into the pool. During the cultivation of the shrimp, fresh water is added every 4 days to 5 days, and the water injection volume is 10 cm to 15 cm.
5. When the seedlings grow to about 1 cm, they can be changed into artificially-combined powders. The main ingredients are wheat bran, fish meal, and sub-powder. During the cultivation period, attention should be paid to the growth of the pond grasses, and if it is too dense, it should be removed to avoid competing for nutrients.
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