Detailed explanation of stubble culture in South American white shrimp greenhouses

China Aquatic Products Channel reported that this article explains in detail the multi-stubble breeding technology of greenhouses. I believe that there are many friends in the breeding process is the greenhouse stubble breeding, you can see what is the difference with your breeding.

Choose a cement pond with an area of 700-1000 square meters, a water depth of about 1.2 meters, strong water exchange capacity, fresh water quality, sufficient light, and no industrial pollution sources nearby. Penaeus vannamei belongs to the marine shrimp species, and within the suitable salinity range for farming, the lower the salinity, the smaller the probability of white spot virus disease in Penaeus vannamei. And the faster the growth rate, the earlier the dehulling, so the salinity of the pond water can be appropriately reduced in the early and middle stages of aquaculture. However, the salt is too low and is not conducive to its growth, for the water body salinity of less than 1% in the area does not advocate the cultivation of Penaeus vannamei, prohibit the wrong practice of putting coarse salt into shrimp ponds, the early stage of breeding is recommended to take low salinity and low nitrogen methods of breeding, the use of freshwater additive culture mode, in the later stage can gradually increase the salinity of the pond water to restore the unique flavor of shrimp in high salinity marine aquaculture, while increasing the hardness of the shrimp shell.

(1) There is a frame greenhouse to build. In the middle of the pond, there is a row of national standard 10 meters of electric prestressed cement pole columns, with a height of 10 meters (depending on the depth and width of the pool), and a depth of 3 meters at the bottom of the pond, with a spacing of 8 meters; Welded into a frame with 1.5 inch (about 5 cm) hot-dip galvanized steel pipe and 10 mm diameter round steel to connect the ground and columns; The pond is surrounded by tripping piles used to fix the longitudinal and transverse wire ropes of the greenhouse, buried deeply 1. 8 meters, height of 0.2 meters above ground, intervals of 1.5 meters; Use 4.2 mm diameter electric wire rope as an east-west diameter wire, 3. 0 mm for the north-south latitude line, formed into a mesh 0.6 m x 1 m rectangular wire rope mesh frame; A drainage ditch was poured with concrete around the pond. The covered insulation film is an agricultural drip-free film, with a thickness of 0.075-0.08 mm, spliced into a whole sheet, covered on the vertical and horizontal wire rope, and then fixed with a mesh and a longitudinal stranded wire rope. Entrance and exit gates are installed at the gables at both ends of the greenhouse.

(2) Frameless greenhouse construction. In the middle of the pond, there is a row of cement piles and middle columns of galvanized steel pipe structure, with a height of 6 meters, a spacing of 3 meters, and a burial of 1.5 meters in the bottom of the pond, of which the 2.5 meters under the pond and the water are poured with a section of 15 cm x 15 cm concrete, and the water part is 60 mm in diameter and 3 in wall thickness. 5 mm galvanized steel pipe; Ponds with larger widths need to be set up with side columns, and the height depends on the height of the shed, and the diameter can be smaller, but it needs to be buried at the bottom of the pond for more than 0.8 meters, with an interval of 2 meters; The beam selects the middle column with the same specification of the galvanized pipe, and the length is 1-2 column intervals; Around the pond are buried 60 cm x 60 cm x 50 cm prefabricated blocks with a depth of 1.5 m and a spacing of 2 m, on which a circle of reinforced concrete anchoring beams are reproduced, with a size of 60 cm x 35 cm, with 4-5 12 mm diameter rebar, a stirrup every 30 cm, and a reserved drawstring hook; Selected diameter 3. 5 mm hot-dip galvanized steel wire rope with both ends fixed in the anchored beam. Upper, where the straight wire rope is perpendicular to the beam, the middle intersects with the beam, the spacing is 30-35 cm, the horizontal wire rope is parallel to the beam, above the straight wire rope, the spacing is 100-120 cm; Film is laid above the straight wire rope and under the horizontal wire rope.

(1) Pond requirements. East-west orientation, requiring rectangular, area of 5 -10 acres, length and width ratio 2: 1, width control within 60 meters, pool depth of 2.5 meters, water level to maintain at 1.5 -2.5 meters. The pool wall is paved with concrete structure or plastic film (thickness of 0.35 mm black hdpe impermeable film), the bottom of the pool pot is shaped, and the sewage hole is provided in the middle; If the sewage hole is located at the edge of the pool, the central ditch is opened at the bottom of the pool and tilted towards the sewage hole, with a slope of more than 5%.

(2) Aeration facilities. It is equipped with waterwheel circulation aeration facilities and bottom-charge aeration facilities. Waterwheel type aeration facility, more than 2 units per pond, each power 0. 75 - 1.5 kW; Bottom-charging aeration facilities, inflated with blowers or air compressors, PVC tubes or microporous tubes for inflatable tubes, diameter 10 mm - 15 mm, inflatable tube spacing of 4 meters. PVC pipe spacing 60 cm perforation, pore size 0. 6 mm.

(1) Stubble arrangement. The first stubble breeding time is generally selected to release seedlings in mid-to-late March, and catch before the end of June to the middle of July; The second stubble is generally sown from the end of July to the middle of August, and all the fishing is completed before the water temperature is lower than 16 degrees Celsius before New Year's Day.

(1) Stocking of good seedlings: choose high-quality shrimp seedlings with healthy and lively physique, strong mobility, uniform specifications, and disease-free. When releasing seedlings, special attention should be paid to salinity, and the salinity of ponds should not be lower than more than 1% of the salinity of nursery ponds.

(2) Water environment control: First, switch the greenhouse in time. The water temperature is controlled at 15-35 degrees Celsius throughout the culture period. In the early stage of the first stubble and the late stage of the second stubble, the outside temperature is low, and the greenhouse should be closed in time; In the middle of summer, the greenhouse should be opened in time, and when the water temperature continues to exceed 32 degrees Celsius, the entire covering film should be removed. Second, the aquaculture water is treated by precipitation. To build a reservoir, the aquaculture water needs to be treated by natural sedimentation for more than 24 hours, and the pumping pond is filtered with 80 mesh sieve silk. Freshwater areas can be bio-purified by stocking silver carp and eating fish in reservoirs, while marine ponds need to be disinfected with 10 g/m3 of bleach.

After reading the above content, I believe that everyone has understood the greenhouse stubble breeding technology, and in the breeding work, it is necessary to make subtle changes according to their own specific conditions, and improve the details of the work, so that your breeding work will be successful.