小新月菱形藻(Nitzschia closterium)含有丰富的多不饱和脂肪酸EPA和DHA,是一种利用价值较高的单胞藻,在水产养殖方面具有很高的应用价值[1-2]。小新月菱形藻是许多贝类、海参、虾类等经济动物苗种生产、幼体培育的优良饵料[3-4]。然而在水产经济动物育苗时,由于小新月菱形藻培养受到自然条件、技术水平等因素的限制,藻类供应往往不 Nitzschia closterium, rich in polyunsaturated fatty acids, EPA and DHA, is a valuable use of monocytogenes and has high value in aquaculture [1-2]. Small crescent Rhizoctonia is the shellfish, sea cucumber, shrimp and other economic animal seedling production, excellent breeding of juvenile food [3-4]. However, in the aquaculture economic animal breeding, due to the natural conditions, technology level and other factors, the algae supply is often not