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以射阳县2006年耕地地力评价、1981年第二次土壤普查数据为基础,利用SPSS统计软件,分析射阳县土壤肥力现状及其变化趋势。结果表明:2006年射阳县土壤有机质、有效磷平均含量分别为14.0g/kg和14.9mg/kg,与1981年相比,极显著上升;2006年土壤pH为8.1,与1981年的8.5相比,下降了0.4;与1981年相比,脱盐土有返盐现象,中重盐土得到一定程度的改良;由于喜钾作物的大范围栽培,土壤速效钾含量极显著下降,从1981年的165.0mg/kg下降至2006年的154.7mg/kg。
Based on the evaluation of cultivated land productivity in Sheyang County in 2006 and the second soil census data in 1981, SPSS statistical software was used to analyze the status of soil fertility and its changing trend in Sheyang County. The results showed that the average contents of soil organic matter and available phosphorus in Sheyang County in 2006 were 14.0g / kg and 14.9mg / kg, respectively, significantly increased compared with that in 1981; the soil pH was 8.1 in 2006, Compared with 1981, compared with 1981, desalination soil salt return phenomenon, moderate heavy salt soil to a certain degree of improvement; due to the wide range cultivation of hi potassium crops, soil available potassium content decreased significantly from 1981 to 165.0 mg / kg to 154.7 mg / kg in 2006.