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土壤酸碱性常用pH来表示,它是指土壤的酸碱程度。土壤酸碱性共分为7级,分级指标、PH反应强度如下:4.5酸性极强,4.5~5.5强酸性,5.5~6.5酸性,6.5~7.5中性,7.5~8.5碱性,8.5~9.5强碱性,9.5碱性极强。我们南方红壤、黄壤等多表现为酸性反应,pH值在5.0~6.5,个别的土壤甚至pH值为4。而北方土壤一般为中性或碱性反应,pH值在7.0~8.5。土壤的pH值不同,土
Soil acid-base pH commonly used to indicate that it refers to the degree of acid-base soil. Soil acid-base is divided into seven levels, grading index, PH reaction intensity is as follows: 4.5 strong acid, 4.5 to 5.5 strongly acidic, 5.5 to 6.5 acidic, 6.5 to 7.5 neutral, 7.5 to 8.5 alkaline, 8.5 to 9.5 strong Alkaline, 9.5 alkaline strong. Our southern red soil, yellow soil and other performance of the acidic reaction, the pH value of 5.0 to 6.5, even the soil pH 4. The northern soil is generally neutral or alkaline reaction, pH value of 7.0 to 8.5. Soil pH is different, soil