Method of culturing Stichopus japonicus, Marsupenaeus japonicus, Portunus trituberculatus and Ulva lactuca

A method of culturing Stichopus japonicus, Marsupenaeus japonicus, Portunus trituberculatus and Ulva lactuca, comprising the following steps:

• (1) preparing a pond and laying a substratum for Stichopus japonicus from March 1 to 5;
• (2) putting Stichopus japonicus seedlings, and then culturing Ulva lactuca seedlings on April 1, wherein the Stichopus japonicus seedlings are stocked at 4000 to 6000/mu, and are at a size range of 500 to 800/kg, and the Ulva lactuca seedlings are cultured at 0.3 to 2.0 kg/m3;
• (3) putting Marsupenaeus japonicus seedlings on April 15, wherein the Marsupenaeus japonicus seedlings are stocked at 1000 to 1200 seedlings/mu, and all of the Marsupenaeus japonicus seedlings are p10 post-larval seedlings;
• (4) putting Portunus trituberculatus juveniles on May 5, wherein the Portunus trituberculatus juveniles are stocked at 150-200 crabs/mu;
• (5) harvesting Marsupenaeus japonicusin on July 15, and putting Marsupenaeus japonicus seedlings again, wherein the Marsupenaeus japonicus seedlings are stocked at 1000 to 1200 seedlings/mu, and all of the Marsupenaeus japonicus seedlings are p10 post-larval seedlings;
• and
• (6) harvesting the Stichopus japonicus, Marsupenaeus japonicus, Portunus trituberculatus and Ulva lactuca from November 5 to 10.