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• 研究简报 • 上一篇    

氮磷营养因子对赤潮异弯藻生长的影响

江艳1;甘旭华1;唐欣昀1;陈晓琳1;于仁成2   

  1. 1安徽农业大学生命科学学院,合肥 230036;2中国科学院海洋研究所海洋生态与环境科学重点实验室,青岛266071

  • 收稿日期:2005-03-28 修回日期:2005-10-25 出版日期:2006-03-18 发布日期:2006-03-18

Effects of nutrients nitrogen and phosphorus on Heterosigma akashiwo growth

JIANG Yan1;GAN Xuhua1;TANG Xinyun1;CHEN Xiaolin1;YU Rencheng2   

  1. 1College of Life Science,Anhui Agricultural University,Hefei 230036,China;2Key Laboratory of Marine Ecology and Environmental Science,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China

  • Received:2005-03-28 Revised:2005-10-25 Online:2006-03-18 Published:2006-03-18

摘要: 研究了N、P营养浓度对赤潮异弯藻(Heterosigma akashiwo)生长的影响.结果表明,该藻的生长速率与N、P营养因子浓度的关系符合Monod公式.在NO3--N浓度达到7.5 mg·L-1时,赤潮异弯藻开始生长;浓度为3.75~75 mg·L-1时,赤潮异弯藻的比生长速率与NO3--N浓度成正比关系.N营养充足时,赤潮异弯藻的最大生长速率μm-n=0.3475·d-1Ks-n=18.91 mg·L-1.PO4--P浓度为0~1.0 mg·L-1时,赤潮异弯藻的比生长速率与P浓度成正比关系;P营养充足时,赤潮异弯藻的最大生长速率μm-p=0.3024·d-1Ks-p=0.4086 mg·L-1.N/P达到25后藻细胞浓度达到最大,表明N/P为25时最适合赤潮异弯藻生长.赤潮异弯藻最适合在N 37.5~225.0 mg·L-1、P 5.0~50.0 mg·L-1、N/P=25条件下生长.

关键词: 沙地, 人工群落, 植被恢复, 生态过程, 小叶锦鸡儿

Abstract: The study showed that the relationships between the specific growth rate (μ) of Heterosigma akashiwo and the concentrations of nutrients nitrogen and phosphorus in water body accorded with Monod equation.H.akashiwo started to grow when the concentration of NO3--N was higher than 7.5 mg·L-1,and the specific growth rate (μ) of the algae was proportional to the concentration of NO3--N between 3.75~75 mg·L-1.The maximum growth rate of H.akashiwo(μm-n) was 0.3475·d-1,and the half saturated constant (Ks-n) was 18.91 mg·L-1.The specific growth rate of the alga was proportional to the concentration of PO4--P between 0~1.0 mg·L-1.The maximum growth rate of H.akashiwo (μm-p) was 0.3024·d-1,and Ks-n was 0.4086 mg·L-1.The most suitable growth conditions for H.akashiwo were 37.5~225.0 mg·L-1 NO3--N,5.0~500 mg·L-1 PO4--P,and N/P 25.

Key words: Sandy land, Artificial plant community, Vegetation restoration, Ecological process, Caragana microphylla