The quality of aquaculture households purchasing shrimp will directly affect the success rate and aquaculture efficiency of the aquaculture. Therefore, the quality of the shrimp should be strictly controlled. The selection of quality shrimp mainly involves the following technical points: First, seed specifications: different varieties of seed specifications are also different. For example, the new shrimp needs to have a seed length of 0.6-0.8 cm, the requirements for white vannamei and Chinese prawn are 0.8-1.0 cm, and the shrimp and shrimp require body length of 1.2-1.4 cm. If the specifications are too small, the seedlings are of weak constitution and the survival rate of the stockings is not high. However, if the seedlings are oversized, the forehead angle will become hard and the high-density transport will easily harm each other and affect the survival rate of the culture. Mulch Films are a revolution in the agriculture industry as it presents an economical and environment friendly protective solution for crops and soil. It not only maintains the quality of soil but also aids in the faster growth of plants. By reflecting light, it ensures control on growth of weeds as photosynthesis process will not be carried out. Sliver Black Mulching Film Sheet,Mulch Film For Greenhouse,Polyethylene Mulch Film JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , http://www.spgreenhouse.com
Second, the body surface observation: high quality prawns seedlings robust, flexible bouncing, the surface clean and tidy, no damage, abdominal section long and full muscle, the whole pool individual size, appendage symmetry without deformity, strong ability against water.
Third, the degree of desalination: As the general shrimp is in the proportion of 1.015-1.022 in the sea between the incubation of seedlings, seedlings must be desalinated before stocking. Seed desalination should be gradually carried out, in the desalination process every day to reduce the proportion of 2 to 4 units, until the salinity and the pond water salinity similar, and stable 1-2 days. Normally, the seedlings in the pond should gradually fade after 7-10 days. It is best to test the water before laying the seedlings.
In addition, conditionalists can use virus detection equipment for shrimp virus detection