The growing environment and conditions of laver

Porphyra growth environment and conditions

Porphyra likes a humid environment and is suitable for growing in sea areas with strong waves, smooth tides and rich nutrients. Porphyra yezoensis is distributed along the coast of Jiangsu Province, with its main production areas in Nantong and Lianyungang. Porphyra truncatula grows along the coast of Zhejiang and Fujian.

Porphyra Growing Conditions

Nori is very drought-resistant and dry-resistant. The suitable light intensity is 5000-6000 lux. Under sufficient light conditions, the yield will increase, making it a high-yield crop.

Porphyra growth temperature

Nori has a strong adaptability to temperature. When it is dried to 20% water content, it can grow for several months to a year in low temperatures around minus 20°C and is still active when placed in water. The filaments have poor drought resistance and require a dark environment, so they are distributed below the low tide line.

Laver growth process

The growth stage of laver is composed of larger thallus and tiny filaments. The thallus reproduces sexually, mainly through the transformation of vegetative cells into female and male cells. The female cells divide to form fruit spores, which are released into seawater after maturity, and then attach to substrates such as shells and grow into filaments.

During the growth of the filaments, conchospore branches will be produced, which will then split into conchospores. After the conchospores are released, they will attach to rocks or artificially set wooden stakes to germinate into thallus. They can also reproduce asexually, transform into single spores, and directly grow into thallus.

Laver planting time and method

The planting time of laver is generally from March to September. Shells for seedling cultivation can be placed in the nursery pond. In April of spring, free filaments can be sprayed and inoculated onto the shells to form shell spores. The early stages need to be washed and managed by brushing the shells with a soft-bristled brush. The shell spores can then be collected with a net curtain and transported to the sea for cultivation in September.