Fall cultivation crab three points
First, to prevent changes in water temperature The crab pool should maintain a certain level of water in order to prevent drastic changes in water temperature. In addition, the temperature difference should not exceed 3°C when filling new water to prevent cold death of crabs.
Second, timely sale of mature crab before and after the annual frost, a group of second-instar crab gonadal maturation, the performance of the back shell was dark green, male crab chewing foot thick and well-developed hair, chelipfoot, step foot healthy and powerful, female crab navel into an ellipse Shaped, surrounded by black hair. At this time, the osmotic pressure in the crab increased, often due to the inability to adapt to the low osmotic pressure of the fresh water environment and died. Therefore, these river crabs should be promptly captured for sale on the market.
Third, to prevent crab indigestion Changes in autumn water temperature and climate can easily affect the crab appetite, causing indigestion and cause death, this time should take the following preventive measures: 1. Improve water quality, regular use of quicklime water Quanchiposa. 2. Feed more animal feed containing high protein, add plant feed, and add antibiotics and auxin regularly in food. 3. When feeding, strictly follow the "Four Sets" requirements, and the amount of feeding will gradually decrease as the water temperature drops.
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