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对辽中县露地和水田土壤有效氮、有效磷、有效钾养分现状进行了调查,对露地土壤有效磷、有效钾含量在1982—2010年间的变化进行了分析。结果表明,与1982年相比,全县露地土壤有效氮平均含量提高至98.96 mg/kg;土壤有效磷含量递增,平均含量由4.96mg/kg上升到11.61 mg/kg;土壤有效钾呈递减趋势,平均含量由128.08 mg/kg下降到79.90 mg/kg,平均每年降低1.34%。水田土壤有效氮、有效磷、有效钾含量随使用年限的增加呈上升趋势。
The status of soil available nitrogen, available phosphorus and available potassium in the open fields and paddy fields in Liaozhong County were investigated. The changes of available phosphorus and available potassium in the soils from 1982 to 2010 were analyzed. The results showed that compared with 1982, the average content of soil available nitrogen in the open field increased to 98.96 mg / kg, the content of available phosphorus in soil increased gradually, the average content increased from 4.96 mg / kg to 11.61 mg / kg, and the available potassium decreased , The average content decreased from 128.08 mg / kg to 79.90 mg / kg, with an average annual decrease of 1.34%. Paddy soil available nitrogen, available phosphorus, available potassium content increased with the age of use is on the rise.