Detailed Explanation of Key Technical Points for Rice-Shrimp Farming

First, transform the paddy field, clear wild growth and disinfect, apply fertilizer, and plant aquatic plants. By mid-to-late March, release shrimp seedlings, and the daily feed mainly consists of wheat, corn and small trash fish, evenly sprinkled. Then harvest before rice planting. After harvesting is completed, adopt the Dalong double-row planting method to plant medium japonica rice. Finally, complete the paddy field management.

Raising shrimp in paddy fields must pay attention to:

1. Selection of the paddy field

The paddy field must have good water quality, sufficient water sources, loamy soil, and an area of at least 30 mu to 50 mu. Before use, the surrounding field ridges must be reinforced, widened, and heightened. Dig ditches around the plot, generally about 0.7 m deep and about 2 m wide. After completion, ten days before releasing the early shrimp seed, drain the paddy field, and for each mu of shrimp ditch, use 75 kg of lime powder for disinfection to eliminate small trash fish, yellow eels, and snakehead fish. Seven days later, plant some aquatic plants in the ditch, with the planting area covering about 20 percent of the ditch.

2. Timing of shrimp seedlings

Shrimp seedlings are generally stocked in mid-to-late August, after the rice has all been harvested. After clearing the plot, seed shrimp can be released. The density of shrimp seed is generally 5-17 kg of seed shrimp of about 23 g per mu.

3. Planting of aquatic plants

Aquatic plants provide hidden places for shrimp to molt. The photosynthesis of aquatic plants can increase the dissolved oxygen content in the water, absorb nutrient sources in the water body, reduce water fertility, and keep water quality fresh. In hot seasons, aquatic plants can provide shade and cooling, which is beneficial to shrimp growth. Aquatic plants can also improve the internal and external quality of shrimp. In addition, aquatic plants also have pharmacological effects that cannot be ignored, which can reduce the occurrence of crayfish diseases.

Suitable aquatic plants for crayfish ponds include Hydrilla verticillata, Elodea, duckweed, and water hyacinth. Among them, Hydrilla verticillata and Elodea are the main planting targets, duckweed is a companion variety, and water hyacinth is only used for crayfish breeding.

Rice-shrimp farming is a form of cross-cultivation and is relatively technical. Therefore, farmers who intend to engage in farming must only begin production when conditions such as technology and market are in place.