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池水中的pH值(俗称酸碱度)与碱度是完全不同的两种含义和概念。pH值的含义为:水溶液中氢离子浓度(摩尔/升)的负对数称为pH值(pH=-lg[H]~+)。水溶液的酸碱性可分为三种情况:pH<7为酸性;pH=7为中性;pH>7为碱性。天然水的pH值变化范围为6.5～9.0,其中多数为6.5～8.5,盐碱地池水的pH值可高达9～10左右。我国渔业水质标准规定pH值为6.5～8.5。夏季光合作用强列时,光合层pH值会增加2个pH单位左右,严重盐碱化土壤、工业污染水源也可使pH值升高。另外盐碱地鱼池的高pH值常伴随产生高碱度。
The pH value of the water (commonly known as pH) and alkalinity are two completely different meanings and concepts. The meaning of pH is: The negative logarithm of hydrogen ion concentration (mol / liter) in aqueous solution is called pH (pH = -lg [H] ~ +). Acidic and alkaline aqueous solution can be divided into three cases: pH <7 is acidic; pH = 7 is neutral; pH> 7 is alkaline. The pH range of natural water ranged from 6.5 to 9.0, most of which ranged from 6.5 to 8.5. The pH value of saline-water ponds could be as high as 9-10. China’s fishery water quality standards for the pH value of 6.5 to 8.5. When summer photosynthesis is strong, photosynthetic layer pH value will increase about 2 pH units, serious salinization of soil, industrial pollution of water can also make the pH value increased. In addition salt ponds high pH often accompanied by high alkalinity.