微绿球藻、隐藻和颤藻竞争氮磷营养的通径分析

Path analysis on competition of nitrogen and phosphorus among Nannochloropsis oculata，Cryptomonas erosa and Oscillatoria chlorine

中文关键词: 微藻  无机氮  无机磷  竞争  通径分析

英文关键词: Microalgae  Nitrogen  Phosphorus  Competition  Path analysis

中文摘要:

      分别将微绿球藻、啮噬隐藻和绿色颤藻进行单培养和混合培养，分析其对氮、磷营养盐的吸收及竞争作用。结果表明，3种微藻对氮磷的吸收速率为颤藻＞微绿球藻＞隐藻，培养至第10天时，无机氮的吸收量分别为13.496、7.533和6.739 mg/L，无机磷的吸收量分别为2.165、0.581和0.510 mg/L。以通径分析法研究3种微藻两两混合培养时对氮、磷的作用程度，发现微绿球藻和颤藻共培养，二者对氮磷的吸收量均有所降低；微绿球藻和隐藻共培养，微绿球藻对氮磷的吸收起主要作用；隐藻和颤藻共培养，隐藻被颤藻抑制，颤藻对氮磷的吸收远大于隐藻。

英文摘要:

      Nannochloropsis oculata，Cryptomonas erosa and Oscillatoria chlorine were seperately or co-cultured in inorganic culture solutions,and the consumption of nitrogen and phosphorus during the culturing was analyzed. The results showed that the absorption ability of O.chlorine on nitrogen and phosphorus was the highest, and that of C.erosa was the lowest. The nitrogen consumption by O.chlorine, N. oculata, and C. erosa were 13.496, 7.533, and 6.739 mg/L respectively at the tenth day, and that of phosphorus were 2.165, 0.581, and 0.510 mg/L, respectively. The effect of the microalgae co-culturing was investigated by the path analysis method. The results showed that the absorption of nitrogen and phosphorus by them both increased, indicating that the interaction of N. oculata and O. chlorine was positive. When N. oculata and C. erosa were co-cultured, N. oculata played a dominant role in utilization of nitrogen and phosphorus. However, the nitrogen and phospborus utilization ability of C. erosa was significantly (P<0.05) inhibited by O. chlorine.