PROBLEM TO BE SOLVED: To provide a culturing method capable of selectively suppressing the proliferation of miscellaneous algae, such as diatom and blue-green algae, without hindering the growth of Caulerpaceae Caulerpa green algae.SOLUTION: A culture method of Caulerpaceae Caulerpa green algae using sunlight is characterized by shielding with a covering material whose transmittance of the light in a wavelength region of 400 to 550 nm is 30 to 60% and whose transmittance of the light in a wavelength region of 600 to 700 nm is 75% or more.SELECTED DRAWING: Figure 3【課題】イワズタ科イワズタ属緑藻の生育を妨げることなく、珪藻や藍藻など雑藻の増殖を選択的に抑制することが可能な養殖方法を提供すること。【解決手段】 太陽光を利用したイワズタ科イワズタ属緑藻の養殖方法であって、４００～５５０ｎｍの波長領域の光の透過率が３０～６０％であり、６００～７００ｎｍの波長領域の光の透過率が７５％以上である被覆資材で遮光することを特徴とするイワズタ科イワズタ属緑藻の養殖方法。【選択図】図３
