The potential productivity of the microalga, Nannochloropsis oceanica SCS-1981, in a solar powered outdoor open pond as an aquaculture feed
The potential productivity of the microalga, Nannochloropsis oceanica SCS-1981, in a solar powered outdoor open pond as an aquaculture feed
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微藻微绿藻 SCS-1981 在太阳能室外开放池塘中作为水产养殖饲料的潜在生产力
DOI：
10.1016/j.algal.2020.101793
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发表时间：
2020-03-01
影响因子：
5.1
通讯作者：
Xiang, Wenzhou
中科院分区：
文献类型：
--
作者：
Li, Tao;Chen, Zishuo;Xiang, Wenzhou
微拟球藻（Nannochloropsis）作为生物柴油原料和水产养殖饲料的潜在应用正受到越来越多的关注。微拟球藻在不同环境中的生长特性和生化组成不同。生物化学成分是至关重要的，因为它们决定了物种的适用性和利润。在一个完全由太阳能供电的新型开放式池塘中，研究了海洋微拟球藻SCS-1981的室外生产力。使用这种技术，在太阳能开放池塘中的最大细胞密度为1.1 × 10（8）细胞mL（-1），蛋白质是主要的生化成分（干重的53.1%）。此外，微生物积累了高含量的二十碳五烯酸（EPA），占干重的近3%。在养殖池中存在益生菌，如褐指杆菌，这是一种革兰氏阴性菌，据报道对养殖动物的吸收和免疫系统有积极的影响。研究结果表明，N.大洋洲适合作为水产养殖饲料。生物量生产力为5.8 g m（-2）d（-1），与传统的跑道塘相当。考虑到太阳能开放式池塘不需要额外的能量输入，可以显着降低养殖成本。该培养方法操作简单，是一种简便易行的微拟球藻养殖技术。该研究将极大地促进用于水产养殖饲料目的的微藻的低成本种植。
The microalga, Nannochloropsis, is receiving increased attention for their potential application as a biodiesel feedstock and an aquaculture feed. Nannochloropsis cultured in different environments has been shown to possess different growth characteristics and the biochemical composition. The biochemical composition are critical as they dictate applicability and profitably of the species. In the present study, the outdoor productivity of Nannochloropsis oceanica SCS-1981 was investigated in a novel open pond that was completely powered by solar-electricity. Using this technique, the maximum cell density in the solar-powered open pond was 1.1 x 10(8) cell mL(-1), with proteins the dominant biochemical component (53.1% of dry weight). Additionally, the microalga accumulated a high content of eicosapntemacnioc acid (EPA) comprising nearly 3% of the dry weight. Probiotics, such as Phaeodactylibacter, were present in the culture pond, which was a gram-negative bacteria that has been reported to have a positive effect on the absorption and immune system of cultured animal. The results of the study indicated that N. oceanica was suitable for aquiculture feeds. The productivity of biomass was 5.8 g m(-2) d(-1), which was similar to traditional raceway ponds. Considering that the solar-powered open pond requires no additional energy input, the costs of culturing can be significantly reduced. This culturing method is easy to work with and would be an easy technique to be used in the culturing of Nannochloropsis as living aquaculture feeds. The study will greatly promote the low-cost cultivation of microalgae for aquaculture feed purposes.