盛夏初秋,池塘的下风水面常漂浮着一层翠绿色的水花,这就是“湖靛”,它是由于蓝藻类大量繁殖而形成的。湖靛在早9点前浮于水面进行光合作用,此时,能占去整个鱼池表面,并有无数气泡溢出水面,放出臭味;9点以后,随着阳光增强,不断下沉到中层,水面上则漂 In the early summer of autumn and early summer, the surface of the pond surface often floats with a layer of emerald green water, which is called “lake indigo”, which is formed by the large population of cyanobacteria. Lake as early as 9 o’clock floating in the water for photosynthesis, at this time, can account for the entire surface of the pond, and numerous bubbles overflow the surface of the water, odor; after 9 o’clock, as the sun intensified, continue to sink to the middle, Floating on the water