几种生态除藻方法探索及其应用效果研究

Study on Several Methods of Ecological Algae Removal and Its Application

为探索水培条件下生态除藻方法,以霍格兰营养液为对照,采用生菜研究了酵母菌胞外物质,衰老银杏叶片提取液,水葫芦根系分泌物,枯草芽孢杆菌胞外物质对水培生菜容器内藻类的生长抑制和生菜生长的影响。5天后测量,结果表明:在营养液中加入衰老银杏叶片提取液1 ml,营养液的pH和EC值最接近正常范围,枯草芽孢杆菌胞外物质1 ml偏离正常范围最远;在营养液中加入衰老银杏叶片提取液1,2,4 ml或者不加入外来物质,生菜生长最好,枯草芽孢杆菌胞外物质2 ml生菜生长最差;对藻类的抑制效果表现为:水葫芦根系分泌物 >枯草芽孢杆菌胞外物质 >酵母菌胞外物质 >衰老银杏叶片提取液 >对照组。综合来看,加入衰老银杏叶片提取液1 ml,植株生长情况良好,藻类生长受到一定抑制。

To explore ecological algae removal methods under hydroponic conditions, compared with Hoagland nutrient solution, using lettuce, the influence of yeast extracellular substances, aging extracts of Ginkgo leaves, water hyacinth root exudates, Bacillus subtilis extracellular substances on algae growth inhibition and lettuce growth in hydroponic lettuce container was studied. Five days later, the results showed that the pH and EC value of the nutrient solution were close to the normal range by adding 1 ml Ginkgo Biloba Leaves Extract Tablets, and 1 ml extracellular substance of Bacillus subtilis made them deviate most from the normal range. The growth of lettuce was the best in the nutrient solution by adding 1, 2, 4 ml old Ginkgo Biloba Leaves Extract Tablets extract or not adding foreign substances. The growth of lettuce was the worst in the 2 ml extracellular substance of Bacillus subtilis. The inhibitory effects of algae are shown as follows: water hyacinth root exudates >extracellular substance from Bacillus subtilis >yeast extracellular substances >aging extracts of Ginkgo leaf >control group. On the whole, the growth of the plant was in good condition, and the growth of algae was inhibited by the addition of 1 ml Ginkgo Biloba Leaves Extract Tablets.