After the beginning of autumn, it is the key season for aquaculture to raise fat and improve the quality of aquatic products. Farmers should adopt the following three measures to promote the quality of shrimp and crab, increase production and efficiency.
1, a reasonable change of water, increase fertilizer and water.
To keep a good pool of shrimp and crabs, we must first cultivate a pool of water. Since the pond began in May, pests and baits should be controlled once every month or 20 days using "bait" and "liquid medicine." The pond is inevitably left with some residual substances, and it is necessary to constantly change new waters during the transition period of summer and autumn to prevent the pool water from becoming “old†and maintain the transparency of suitable fertilizer and water. Generally, the shrimp pond maintains a transparency of 30-36cm and a crab pool of 35cm or more. If the transparency of the pool water is less than 20cm, 10-15 kilograms of lime shall be splashed to adjust the water quality, and the transparency shall be greater than 40cm if applicable.
2, a reasonable feeding, promote fat long.
Shrimp and crab are the key to improve quality and increase production efficiency. After the beginning of autumn, fresh animal foods fed with shrimps account for 60% of the feed ratio, and daily dosage is 7-8% of the total amount of shrimps; animal foods fed with crabs account for 65% of the feed amount, and the amount of daily diet is the total amount of crabs. 10%. After September, the temperature and water temperature gradually decreased, and the daily feeding amount was reduced to 4% of shrimp and 4 to 5% of crab.
3, rational use of drugs, prevention and treatment of diseases.
After the beginning of autumn, it is necessary to persist in the prevention of pests and diseases, and to prevent them in the end. We must continue to adopt a combination of “eliminating consumption†and “internal treatment†to prevent the occurrence of diseases and insect pests. Every 20 days or so use chlorine dioxide shrimp, crab drugs for 100g per mu, Quanchiposa once, while adding in the feed, "decorin", "calcium tablets", "terramycin" and other drugs mixed baits feeding, Once a month, the proportion of bait used for each application is about 0, 5 。.
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