Crab breeding ponds and nestling culture techniques 1. Pond conditions: The ponds generally have more than 10 acres of ponds, and are convenient for drainage and drainage, and have rich dissolved oxygen. Some water plants are planted in ponds. Aquatic grass has two functions: one is that the crab shell adheres to hide to avoid the soft-shelled crab; the second is when the wild fish brought in when the water is introduced breeds eggs when breeding, and the breeding wild fish are used for the carp. edible. Ponds should be sterilized every year in aquaculture ponds. Second, carp species breeding In order to improve the survival rate of carp seedlings and shorten the breeding cycle, then the breeding of commercial carp, carp seedlings is best to choose the southern production of the early hybrid carp seedlings, after the development of special pool to develop people Pool. In general, about 3cm of squid and summer flowers will be introduced into the special pool for cultivation in May, and five to seven cm of squid species will be reared in the middle of June to be stocked with crabs. 1. When transporting seedlings of seedlings, transportation time should be shortened as much as possible, and transport should be selected in relatively cool weather. Normally oxygen bags are used for oxygenation and transportation. Each bag has 300 to 500 seedlings. The transportation time is controlled within 8 hours. If it exceeds 8 hours, the water should be changed for oxygenation halfway. Short-distance transport can use live water trucks to transport oxygen. 2. Preparation before stocking The carp seedling cultivation pond is suitable for an area of ​​about 1 mu. The carp seedlings were decontaminated with 120kg/mu of lime in the clearing pond one month before entering the pond, and water was injected to 80cm one week later, and 200,000 tails per mu were stocked with carp, carp, and carp, which were used as bait fish for carp seedlings during the cultivation period. After soaking in soybean milk or egg yolk, after 15-20 days of cultivation, when the baitfish grows to 1.5-2cm, the 3cm or so squid summer flowers that are brought back from the south will be put in cultivation ponds. When releasing seedlings, the seedling bags should be put into the pool water for 3 to 5 minutes so that the water temperature in the bag is basically the same as the pool water temperature. Even the fish is poured into the plastic basin, and 5% salt water is added to soak 5 After a few minutes, they were put into Tongkou. After 20-30 days of cultivation, they can grow to 5-6cm in size. Third, seed stocking adheres to the principle of scientific and reasonable, to achieve the goal of not only making full use of water space and bait resources, but also maximizing output. Crab ponds generally have a physique per acre that is robust, without limbs, and residual limbs. The standard is 100-120/kg of crabs with 800--1000 crabs. The crabs are stocked in mid-March. A total of 30 tails per mu are stocked with oysters and puffer fish to consume plankton in the water and improve water quality. In June, 5 to 7cm of carp species will be reared in 30--40 tails/mu. In order to ensure that there are enough bait fish for squid, it is best to stock up in the pond a few fast-growing 2 winter squid, stocking 5-6 groups per acre, male to female ratio of 2:1, and sterilizing with 5% of salt water5- In 10 minutes, these eels will breed naturally when the temperature rises in April to provide puff feeds for the carp species to enter the pool. At the same time, carp can also feed the residual bait or rotted fish at the bottom of the pond to prevent water quality deterioration. Fourth, feeding and management 1. Observe the observation of bait fish Under normal circumstances, this type of bait fish can be self-sufficient, and no additional feed bait is needed. There are two sources of bait fish: one is the small fish that the wild fish, such as the spike fish, brought into the water, breeds; the second is the bait fish produced by the stocking of the stocked salmon. However, in order to ensure that there are enough bait fish, we must always check the density of bait fish, can be used to dip a few nets at the water dip net, if you do not fish small shrimp or fish out a small number, indicating that there are not many bait fish, Should try to supplement, in the pool per acre put 0.5-1kg egg-bearing shrimp, hatched prawn on the one hand can be used as a supplementary feed bait, on the other hand, the end of the year harvested shrimp to improve economic efficiency, and shrimp to float Biological, organic debris for food, can improve water quality 2. Feeding of bait is mainly fed with crab food. When feeding, attention should be paid to: Feeding of animal baits should be kept fresh, rinsed, sterilized and fed. Feeding of rotten and spoiled baits should not be banned. Frozen sea fish. Vegetable diets such as corn and wheat must be processed and fed. At the same time, according to the nutritional needs of the various stages of crab growth regularly adjust the bait, usually to adopt the "middle green, two fine" control method, that is, fine, green (coarse) feed mix, and feed together; early (4-May For the early feeding period and the post-food period (8-September for the fattening period), mainly concentrate feeds and green feeds are supplemented; mid-term (6---July for the food-rich period) is dominated by plant-based diets, In addition to concentrate feed, cast some starch, sugar materials such as hawthorn and pumpkin to adjust the flavor of crab meat. The bait is mainly placed on the edges of the aquatic plants that are 15 to 20cm away from the water, and should not be put in the middle of the plants to avoid affecting the feeding of the crabs. Regulation of water quality; carp resistance to hypoxia, poor requirements for dissolved oxygen in water, crabs prefer a fresh water environment, therefore, should pay special attention to water quality improvement, the main measures: 1 splash lime, 20--30kg per acre per month Lime Quanchiposa. 2 Spill EM bacteria, EM bacteria can increase the dissolved oxygen in the water, improve crab product specifications, reduce the feed coefficient, improve water quality, reduce disease, improve survival rate. 3 focus on improving the bottom quality, from September to September every 15 - 20 days using bottom modifier 250g/mu m, it can purify water quality, reduce ammonia, hydrogen sulfide, eliminate heavy metal ions and nitrite, improve water quality surroundings. 4 often change the water, usually in 15 days before May, add water once, 6-8 months every 10 days to fill a clean water, add water time in the day is appropriate, keep the water dissolved oxygen is not less than 5mg/L.
layer poultry rearing cages
1. Frame Steel, with white PVC anchor/holder; Ball valve automatic water system with white PVC water pipe; Zinc Plating steel; Well-sealed down-stream end, with pressure regulator.
2. Technical advantage, not easy to be eroded with Zinc Plating;
Good elasticity not deformation; Service life at least 14 years.
3. Reasonable Grid mesh and space to avoid the fatigue of the chicken which extends the egg-laying cycle time; The egg damage rate is zero.
4. White full-length PVC Pipe & black or white U-shaped feeding trough, with strong pressure resist and heat-resistant.
5. Well-equiped water-supply governor; Whole air-tight design, Simple pressure regulating and water filteration. Very easy to operate & control.
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