荸荠对铜绿微囊藻的化感抑制作用研究

采取植物种植水培养、植物浸提液培养及植物共培养3种培养方式研究了荸荠对铜绿微囊藻生长的影响.结果发现:荸荠植株种植水、荸荠浸提液以及荸荠与铜绿微囊藻共培养均对铜绿微囊藻的生长产生了化感抑制作用.100%浓度的荸荠浸提液对铜绿微囊藻生长抑制率达到91.40%,而荸荠与铜绿微囊藻共培养时对铜绿微囊藻生长的抑制率为86.83%.这两者之间的差异并不显著,直接验证了荸荠能够通过不断地向水体中释放化感物质来长久、有效地抑制铜绿微囊藻的生长.

Study on allelopathic effects of Eleocharis dulcis to Microcystis aeruginosa

Three cultural modes including Eleocharis dulcis planting water, aqueous extract of Eleocharis dulcis and Eleocharis dulcis co-culture with Microcystis aeruginos were studied to explore the effects of Microcystis aeruginosa growth. It is found that Eleocharis dulcis planting water, aqueous extract of Eleocharis dulcis and Eleocharis dulcis co-culture with Microcystis aeruginosa had inhibited the growth of Microcystis aeruginosa, and the inhibitory effects was caused by allelopahty. The inhibitory ratio of aqueous extract of Eleocharis dulcis with 100% concentration was 91.40%, and the ratio of co-culture mode was 86.83%. According to this research, it can be found that Eleocharis dulcis has a certain application prospect in the field of ecological algal inhibition as an emergent plant.