Detailed Explanation of Key Points for High-Quality Chinese Mitten Crab Farming Techniques

Preparation for Stocking Seedlings

Use a dragnet to block and prevent escape. When disinfecting and clearing the pond, remove excess mud, leaving only about 10 cm of mud, and sprinkle quicklime over the entire pond at 200—250 kg per mu to achieve thorough pond clearing and disinfection, remove impurities and wild species, kill pathogens, and improve the substrate. Seven days after treatment, change the water once to flush out debris, then dry the pond for 3—5 days before adding water. Plant water plants well.

To farm Chinese mitten crabs, you must first plant water plants well. Water plants are one of the natural baits for Chinese mitten crabs, can effectively purify water quality, and are also a place for Chinese mitten crabs to inhabit and escape from enemies. Mainly algae-based. An appropriate amount of river snails can also be added.

Reasonable Stocking

Before stocking, disinfect the crab seedlings, separate them evenly by size, and when stocking, use a surrounding net to place them within the water area, allowing the crabs to adapt to the environment for 1 month before removing the surrounding net. Generally, crab seedling stocking should follow the "three suitable" and "one temporary holding" principles. That is, appropriate density, timely stocking, moderate size, and temporary holding before stocking. When stocking, the water must not be too deep; 1.5—2 m is suitable; a temperature of 20—25 degrees is most suitable.

Stocking Density

In an environment with abundant water plants and fresh water quality, generally about 300 per mu are stocked, so that the Chinese mitten crabs have sufficient living and growing space. The stocking time for crab seedlings is generally suitable from the end of February to March each year. If stocking is too early, overwintering losses will be heavier; if too late, water temperature rises, some river crabs will molt, which will affect the survival rate after entering the pond.

Daily Pond Patrol

Morning pond patrols mainly check whether there is leftover bait, so as to arrange the day's bait; midday pond patrols mainly measure water temperature and observe the water color and changes in the pond water; evening and nighttime pond patrols mainly observe the activity and feeding conditions of the river crabs, and take timely measures when problems are found.