How can we achieve the best fatness of listed crabs? Through aquaculture experience and understanding and analysis of a large number of farmers, it has been concluded that the following three aspects must be reasonably done.
First, a reasonable change of water, to maintain good water quality: the pond during the summer farming process for disease prevention and treatment drugs, it is inevitable that there is some residual material, to the autumn to constantly change new water, prevent pool water deterioration, to maintain the transparency of the pool water, general crab pool To be more than 35 centimeters. Changing the water is best done before the last shelling of the crabs. It will not only improve the water quality, but also make the crabs shell out neatly and smoothly. Change the water every 10 days or so, and change the amount of water at least 30% of the total.
Second, a reasonable feeding, ensure adequate nutrition: the crab fattening period is best to feed the protein content of more than 32% of the crab special material, the amount of daily feeding is about 10% of the total amount of crab, the actual production to be fed 2 After 3 hours of basic eating, the amount of daily feeding should be gradually lowered as the temperature and water temperature gradually decline. Feeding time is usually dominated by early evening and supplemented by early morning.
Third, rational application of pesticides to ensure physical health: the crab fattening period of the prevention of pests and diseases must be perseverance, prevention in the end, especially for the prevention of ciliate disease, we must take "eliminate" and "internal" combination of methods to prevent pests and diseases occur. Can be used in the crab after the last shelling 10 days with chlorine dioxide and other drugs Quanchiposa 1, and can be added in the feed to prevent disease treatment of crabs with drugs bait feeding, and even fed 5 to 7 days.
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