摘要
植物生长调节剂(MET)能影响蓝藻的生长、固氮活性和区系的组成。166.7×10^(-6)的 MET 能提高固氮活性24.9%;高浓度(≥1000×10^(-6))的 MET 抑制蓝藻生长、但未见发生致死效应;MET 对蓝藻群落组成有影响,有利于鱼腥藻而不利于念珠藻,影响大小随生态环境因子的不同而改变。
MET have significant effect on the growing process,N_2-fixation activity and evolution cha- racteristic of N_2-fixing blue-green algae in paddy field in Beijing area.It was observed in the experiment, 166.7×10^(-6)MET could increase 24.9% of N_2-fixation activity;High concentration of MET(≥1000× 10^(-6))could inhibit the growth of N_2-fixing algae,but couldn't cause its death;effects of MET on the evo- lution of the N_2-fixing algae were advantageous to Anabaena(BA01),but not to Nostoc(BA03),its influ- ence would be changed when the ecological environment changes.
基金
国家自然科学基金
关键词
多效唑
固氮蓝藻
生态条件
MET
N_2-fixing blue-green algae
ecological environment
