天津市农田土壤肥力质量现状及演变分析

摘要

通过调查和土壤样品采集测定法,对天津市23 685块农田土壤肥力质量状况及变化进行了研究.结果表明,目前天津市农田土壤有机质含量偏低,处于中等偏下水平的面积比例占73.2％;农田土壤全氮含量处于中等偏上水平,处于中等以上水平的面积比例占82,O％;农田土壤磷钾含量较高,总体处于中等偏上水平,其中农田土壤磷含量处于丰富水平的占50％以上;农田土壤肥力质量增加与农田施肥水平增长有着密切关系.该研究为天津市农田科学施肥与农田土壤肥力质量提高提供了参考依据.%A survey on the status quo and change reasons of 23 685 farmlands' soil fertility quality was carried out in Tianjin city.The results showed that the content of farmland soil organic matter was low and 73.2％ farmlands' contents were medium and low; the content of farmland soil's total nitrogen was medium and 82.0％ farmlands' contents were medium and high; the soil phosphorus was accumulated and above 50％ of farmlands were abundantly.The increase of farmland soil fertility was closely associated with farmland fertilization level.It provided references for farmland soil fertility improvement and reasonable fertilizers application in Tianjin city.