River crab breeding method
A breeding method and technology for river crabs, which are applied in fish farming, climate change adaptation, animal feed, etc., can solve problems such as the improvement of unfavorable breeding benefits of river crabs, foreign exchange earning from exports, and small size, so as to improve the breeding output and breeding efficiency, prevent the The effect of precocious puberty and prolonged growth period
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Embodiment 1
[0022] The present invention is a kind of cultivation method of river crab, and the technological step that adopts is as follows:
[0023] 1. Purchase and transportation of crab seedlings: buy crab seedlings bred from the beginning of May to the end of June. The crab seedlings are required to be golden yellow in color, strong in activity, free of parasites on the body surface and strong in physique, and the parents of the breeding crab seedlings are River crab in the Yangtze river system. Transportation of crab seedlings: Transport crab seedlings in a seedling box of 1.0×0.6×0.15 meters, with 500-1000 grams of seedlings in each box.
[0024] 2. Cultivation of crab seedlings: Before the crab seedlings are stocked, clean and disinfect the seedling pool with quicklime. The amount of quicklime is 75-100 kg / mu; The upper end is sewn with a plastic film with a width of 20-30 cm, and the fence is 80 cm high, of which 20 cm is buried in the mud, and a bamboo stake is fixed every 2 me...
Embodiment 2
[0030] The present invention is a kind of cultivation method of river crab, and the technological step that adopts is as follows:
[0031] When purchasing seedlings bred from the beginning of May to the end of June, it is required that the body color of the seedlings is golden yellow, strong in activity, free of parasites on the body surface, and strong in physique, and the parents of the seedlings for breeding are river crabs in the Yangtze River system. Before the crab seedlings are put in a suitable place to breed, the ponds are cleared, fertilized, planted grass and anti-escape fences are set up in the breeding ponds. After 7 days after clearing the ponds, 0.8 kg of crab seedlings are stocked in every acre of ponds. The species of aquatic plants planted in the crab pond are Elodea, water peanut, Hydrilla verticillium and bitter grass, covering more than 60% of the total area of the pond. The feed for crab seedlings is mainly surimi, eggs and artificial pellet feed, which...
Embodiment 3
[0033] The present invention is a kind of cultivation method of river crab, and the technological step that adopts is as follows:
[0034] When purchasing seedlings bred from the beginning of May to the end of June, it is required that the body color of the seedlings is golden yellow, strong in activity, free of parasites on the body surface, and strong in physique, and the parents of the seedlings for breeding are river crabs in the Yangtze River system. Before the crab seedlings are put in a suitable place to breed, the breeding ponds are cleared, fertilized, planted grass and anti-escape fences are set up. After 7 days after clearing the ponds, 0.5 kg of crab seedlings are stocked in every acre of ponds. The species of aquatic plants planted in the crab pond are Elodea, water peanut, Hydrilla verticillium and bitter grass, covering more than 60% of the total area of the pond. The feed for crab seedlings is mainly surimi, eggs and artificial pellet feed, which are fed 2-4 ...
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