Detailed Guide to Ragworm Farming Techniques: Master All Methods and Management Points

The ragworm (Tylorrhynchus heterochaetus) is a species in the family Nereididae of the phylum Annelida, usually inhabiting shallow flats along coasts or estuaries. In China it is mainly found in the three provinces of Zhejiang, Guangdong and Fujian. It is a delicious ingredient and can also be used as traditional Chinese medicine, with effects of reducing swelling and tonifying qi. The farming methods for ragworms are described below.

Site Selection and Design of the Seedling Farm

The seedling farm is divided into two parts: the shade canopy and the breeding pond. The top of the canopy is built with shade netting material and film, covering the breeding troughs, and breeding troughs are set up inside the canopy.

Selection of Mud and Water

For the mud, surface mud from river channels is used, and the mud needs to be filtered first, then spread flat in the breeding troughs. Water is then added to the breeding troughs, and its salinity is adjusted so that the water's salinity is 18 degrees, with a pH of 5-8 degrees.

Preparation Before Fertilization

Pour the filtered clean water into plastic boxes, and place an oxygen pump in each plastic box for oxygenation.

Seed Selection

Select robust, plump, brightly colored, uninjured male and female worms as breeding worms.

Fertilization

Place the breeding worms into the plastic boxes already filled with water and let them fertilize naturally. When performing artificial insemination on them, when the fertilized eggs become figure-"8" shaped fertilized eggs and then become four swimming spherical fertilized eggs that rotate on their own, use filtered water gauze to wash the sperm.

Stocking

Place the sperm-washed swimming spherical fertilized eggs into the breeding troughs; the method is to pour the swimming spherical fertilized eggs from each box into the breeding troughs as soon as that box is washed. After the four swimming spherical eggs become pupae and then develop into three-segment worms, desalinate the water in the breeding troughs.

Feeding

When the larvae develop into three-segment worms, start feeding on the first day of water desalination. When larval holes appear in the mud, drain the water from the breeding troughs, then sprinkle food on the surface of the mud for feeding, and then on the morning of the next day put the filtered water back into the breeding troughs. Continue feeding for 20 days; once the cultivation of Tylorrhynchus heterochaetus is complete, transfer them to rice fields to raise until harvest.