Iron Fertilization Increases Seaweed Yield
In recent years, there has been a decline in the productivity of red seaweeds in the Sulu Sea where the bulk of the production comes from. The drop is attributed to many factors such as genetic deterioration (slow growth), lack of nutrients, and adverse environmental conditions.
The application of chemical fertilizers such as ammonium nitrate and ammonium sulfate is practiced in China and Japan for seaweed culture in coastal waters. In the Philippines, seaweed farmers do not apply fertilizer. No studies on the use of fertilizers for increasing growth of seaweeds in coastal waters have been reported yet.
















