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有经验的渔民都知道,鱼塘的水色是水中的溶解物质、悬浮颗粒、浮游生物、天空及塘底色彩反射等因素综合作用的结果。如富含钙、镁、铁盐的水呈黄绿色,富含溶解腐殖质的水呈褐色,含泥沙多的水呈土黄色且混浊,等等。但鱼塘的水色主要还是受水中的浮游生物特别是浮游植物所影响。浮游植物包括金藻、黄藻、硅藻、甲藻、裸藻、绿藻、蓝藻等数十种。由于各类浮游植物细胞内含有不同的色素,当浮游植物繁殖的种娄和数量不同时,便使塘水呈现出不同的颜色和浓度。
Experienced fishermen know that aqua fish ponds are the result of a combination of dissolved matter, suspended particles, plankton, sky and bottom color reflections and other factors. If rich in calcium, magnesium, iron salt water was yellow-green, rich in humus dissolved in water brown, sandy muddy water was yellow and cloudy, and so on. However, the color of fish ponds is mainly affected by the plankton in the water, especially the phytoplankton. Phytoplankton include golden algae, xanthophylls, diatoms, dinoflagellates, euglena, green algae, cyanobacteria dozens of species. As various types of phytoplankton cells contain different pigments, when the number of species and species of phytoplankton multiplication are different, the ponds show different colors and concentrations.