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采用野外调查和室内分析的方法,研究了桐庐县水田土壤酸碱度现状。结果表明:桐庐县水田土壤pH为3.8~8.4,平均5.86,与第二次土壤普查时pH平均值(6.00)相比,桐庐县水田土壤pH降低了0.14。造成土壤酸化的本质原因是酸性的成土母质,主要原因是长期大量施用生理酸性化肥。合理施用石灰石粉、增施有机肥、推广测土配方施肥是改良酸化土壤的有效措施。
Field investigation and indoor analysis were used to study the status of soil pH in paddy soils in Tonglu County. The results showed that the soil pH of paddy field in Tonglu County was 3.8 ~ 8.4 with an average of 5.86. Compared with the average value of soil pH at the second soil survey (6.00), the soil pH of Tonglu paddy field decreased by 0.14. The essential reason for acidification of soils is acid soil parent material, mainly due to the long-term large-scale application of physiologically acidic fertilizers. Rational use of limestone powder, organic fertilizer, promote soil testing and fertilizer is an effective measure to improve the acidified soil.