The utilization rate of nitrogen fertilizer in China is about 35%, phosphorus fertilizer is about 15%, and potassium fertilizer is about 50%. A large part of the various mineral elements applied to the soil are lost and eventually enter the coast with rivers, causing a deficit of mineral elements on land. Not only the loss of fertilizers, but also the discharge of urban living and industrial wastewater brings in mineral elements and organic substances to the sea, resulting in the enrichment of nutrients near the sea while the loss of mineral elements on land.

In the process of growth, the kelp needs to be adjusted to buoyancy, so that the kelp rises to the surface position to absorb sunlight for photosynthesis, during which the kelp will absorb carbon (C), which can reduce the concentration of CO2 in the atmosphere; at the same time, when the kelp grows, it also needs to absorb mineral nutrients in seawater, which can absorb nutrients in seawater equivalent to 440,000 times its own volume, which can prevent sea eutrophication.