对黑龙江省“八五三”农场1973~2007年间4次土壤养分调查的数据进行分析,研究土壤有机质及速效养分变化情况。结果表明“:八五三”农场土壤有机质及速效养分含量均较高,但土壤有机质含量随开垦年限增加呈下降趋势,在开垦初期20年内下降较快,之后变化缓慢;土壤中碱解氮、有效磷、有效钾整体水平提高,主要集中在1~3级。 The data of four soil nutrient surveys from 1973 to 2007 in “853” farm in Heilongjiang Province were analyzed to study the changes of soil organic matter and available nutrients. The results showed that the contents of organic matter and available nutrients in farmland were high, but the content of soil organic matter decreased with the increase of reclamation years, but decreased rapidly in the early 20 years of reclamation and then changed slowly. Nitrogen, available phosphorus, potassium increased the overall level, mainly in the 1 to 3.