Ulva fenestrata is an economically and ecologically important green algal species with a large potential in seaweed aquaculture due to its high productivity, wide environmental tolerance, as well as interesting functional and nutritional properties. Here, we performed a series of manipulative cultivation experiments in order to investigate the effects of irradiance (50, 100, and 160 μmol photons m⁻² s⁻¹), temperature (13 and 18 °C), nitrate (< 5, 150, and 500 μM), phosphate (< 1 and 50 μM), and pCO₂ (200, 400, and 2500 ppm) on the relative growth rate and biochemical composition (fatty acid, protein, phenolic, ash, and biochar content) in indoor tank cultivation of Swedish U. fenestrata. High irradiance and low temperature were optimal for the growth of this northern hemisphere U. fenestrata strain, but addition of nutrients or changes in pCO₂ levels were not necessary to increase growth. Low irradiance resulted in the highest fatty acid, protein, and phenolic content, while low temperature had a negative effect on the fatty acid content but a positive effect on the protein content. Addition of nutrients (especially nitrate) increased the fatty acid, protein, and phenolic content. High nitrate levels decreased the total ash content of the seaweeds. The char content of the seaweeds did not change in response to any of the manipulated factors, and the only significant effect of changes in pCO₂ was a negative relationship with phenolic content. We conclude that the optimal cultivation conditions for Swedish U. fenestrata are dependent on the desired biomass traits (biomass yield or biochemical composition).

Ulva fenestrata是一种经济上和生态上重要的绿色藻类，由于其高生产力，宽环境耐受性以及有趣的功能和营养特性，在海藻养殖中具有巨大的潜力。在这里，我们进行了一系列操纵性培养实验，以研究辐照度（50、100和160μmol光子m ^-2  s ^-1），温度（13和18°C），硝酸盐（<5,150和500μM），磷酸盐（<1和50μM）和p CO ₂（200、400和2500 ppm）的相对增长率和生化成分（脂肪酸，蛋白质，酚，灰分和生物炭含量）在瑞典芬尼丝塔的室内水箱养殖中。高辐照度和低温是该北半球芬尼斯特拉霉菌菌株生长的最佳条件，但是添加营养或改变p CO ₂水平对于增加生长不是必需的。低辐照度导致最高的脂肪酸，蛋白质和酚含量，而低温对脂肪酸含量有负面影响，但对蛋白质含量有正面影响。添加营养素（尤其是硝酸盐）会增加脂肪酸，蛋白质和酚的含量。高硝酸盐含量降低了海藻的总灰分含量。海藻的炭含量没有响应任何可控因素而变化，而p CO ₂变化的唯一显着影响是与酚含量呈负相关。我们得出的结论是，瑞典扇形藻的最佳栽培条件取决于所需的生物量性状（生物量产量或生物化学组成）。