水利水电技术2017，Vol.48Issue(9)：29-34,83,7.DOI:10.13928/j.cnki.wrahe.2017.09.005
氮磷比对固氮和非固氮蓝藻种间关系的影响
Influence from nitrogen-phosphorusration ratio on interspecific relationship between N-fixing and non N-fixing cyanobacterias
摘要
Abstract
Cyanobacteria is one of the main algal group to cause algal blooms.The nitrogen to phosphorus ratio (N ∶ P) is a major factor that affecting the N-fixing cyanobacteria proliferation.However,the N∶ P ratio influencing on the interspecific relationships between N-fixing and non-N-fixing cyanobacteriais still unclear.Through establishing the pure-and mixed-cultures with the N∶ P molar ratio of 2,16 and 64,the growth rates,capacity and competition coefficients of Anabaenaflos-aquae (N fixing cyanobacteria) and Microcystis wesenbergii (non-N-fixing cyanobacteria) were determined.Furthermore,the interspecific relationships between the A.flos-aquae and M.wesenbergiiin under N ∶ P were studied.The result showed that the growth rate and maximum environmental carrying capacity of M.wesenbergii were higher than those of A.flos-aquae in both pure-and mixed-cultures.The cell density of M.wesenbergii in pure-culturesreached the maximum (818 × 104 cells mL-1) under N∶ P =16,and the cell density of A.flos-aquae inpure culturedreached the maximum (113 × 104 cells mL-1) under N ∶ P =2.Moreover,the maximum cell densities of M.wesenbergii in mixed-cultureswere higher than those in pure-cultures under all N ∶ P conditions,but the A.flos-aquae showed an opposite trend of those.The results suggested that it was more beneficial to non-N-fixing M.wesenbergii under all N ∶ P conditions in mixed-cultures.Although the competitive ability of A.flos-aquae was weaker,it can provide new nitrogen for M.wesenbergii in mixed-cultures,and thuspromote the proliferation of non-N-fixing M.wesenbergii.关键词
微囊藻/鱼腥藻/氮磷比/种间关系/固氮/生态系统服务功能/湿地Key words
Microcystis wesenbergii/Anabaena flos-aquae/nitrogen-phosphorus ratio/interspecific relationship/nitrogen fixation/service functions of ecosystem/wetland分类
环境科学引用本文复制引用
张骁栋,崔丽娟,王金枝,颜亮,康晓明..氮磷比对固氮和非固氮蓝藻种间关系的影响[J].水利水电技术,2017,48(9):29-34,83,7.基金项目
中国林科院基本科研业务费专项资金项目资助(CAFYBB2014QB025) （CAFYBB2014QB025）
国家自然科学基金项目(31300400) （31300400）
