摘要
本研究以P浓度为0.05 mg/L、0.4 mg/L和1mg/L的低、中和高浓度3种情况,分别设置N/P为10、20、30、40、50这5种比例的培养液,分别对小球藻(Chlorella vulgaris)与铜绿微囊藻(Mcirocystis aerugi-nosa)进行纯培养与混合培养,以期研究不同N、P浓度及比例对两种藻竞争关系的影响.结果表明:在纯培养条件下,两种藻的最大浓度显著大于混合培养,两种藻在混合培养条件下具有竞争抑制作用.混养下小球藻在P浓度为(0.4mg/L),N/P为20时的KR值最大为1.47,说明其竞争优势更为显著,在养殖、景观水体或者江河湖库中可以参考该数据来构建有益藻类占优势的健康藻相,能够在一定程度上控制蓝藻爆发,为养殖相关水体蓝藻水华问题的控制提供依据.
Abstract
This study used low,medium,and high concentrations of P with concentrations of 0.05mg/L,0.4mg/L,and 1mg/L,and set up culture media with N/P ratios of 10,20,30,40,and 50,respectively,to conduct pure and mixed culture on Chlorella vulgaris and Microcystis aeruginosa,in order to study the effects of different N,P concentrations and ratios on the competitive relationship between the two algae.The results showed that the maximum biomass of the two algae in pure culture was significantly greater than that in mixed culture,indicating that the two algae exhibited competitive inhibition under mixed culture.Under mixed cultivation,Chlorella vulgaris has a maximum KR value of 1.47 at a P concentration of(0.4mg/L)and N/P of 20,indicating a more significant competitive advantage.This data can be used to construct healthy algal blooms dominated by beneficial algae in aquaculture,landscape water bodies,or rivers,lakes,and reservoirs,which can to some extent control blue-green algae outbreaks and provide a basis for controlling blue-green algae blooms in aquaculture related water bodies.
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