Green prawn seeds breeding and management techniques
Pond conditions
Since the breeding of green shrimp, generally about 2 cm per acre can be cultivated 3 million tail - 4 million tail, farmers can determine the area according to the demand, choose 1 acres -3 acres of ponds, pond sludge requirements less than 15 cm, 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 is discharged to 10-20 cm, and the quicklime is used to clear the pond, and the amount of 150-200 kg per mu is required to be splashed evenly.
2. Planting aquatic plants. After 7 days to 10 days of clear ponds, the best way to transplant plants is to use black algae. The grasses are 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. The insecticide treatment should be carried out in front of the shrimps in the pond before launching the eggs, and the insecticides such as fish killers and other shrimps can be used to kill large cladocera, water spiders, etc. Insects, while adding pool water to 50 cm - 60 cm.
Put egg shrimp
After the disappearance of the potency of the pool water, the egg-bearing shrimps should be placed at a rate of 8 to 10 kilograms per mu. In order to facilitate the observation of fertilized eggs development, we can set 3 to 4 cages in the corner of the pond from 1m to 2.2m. Each cage is placed around 50 eggs and observe the color change of fertilized eggs every day. When 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 - 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 was applied every 10 days to regulate water quality and supplement calcium source. The dosage was 15 kg per mu of water at 1 meter and the pH of the pool water was between 7-8.
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 larval rearing period, fresh water should be filled every 4 days to 5 days, and the water injection volume should be 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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