对双辽市耕层土壤速效氮、速效磷、速效钾养分进行测试、统计,结果表明,与1982年全国土壤普查速效养分比较发生了很大的变化。对其变化原因进行分析,并提出合理施肥对策,以期指导农业生产。 The soil available nitrogen, available phosphorus and available potassium in Shuangliao City were tested and statistically analyzed. The results showed that there was a great change compared with the 1982 National Soil Census. Analysis of the reasons for its change, and put forward reasonable fertilization measures, with a view to guiding agricultural production.