扬州市邗江区土壤肥力变化趋势研究

The Change of Soil Fertility in Hanjiang District,Yangzhou City

通过对扬州市邗江区土壤的土壤肥力动态检测,结果显示,2005年耕层土壤有机质、全氮、有效磷、速效钾含量均较1984年、1994年有所增加。针对区域局部地区土壤肥力问题,提出了改善对策,包括建立土壤肥力监测点、采用秸秆还田、推广测土配方施肥技术、改善土壤生态环境等内容。

1 395 soil samples of plow layer were collected form HanJiang district and analyed with the methods suggested by the agricultural ministry.The results showed that the content of soil organic matter,total nitrogen,available phosphorous and available potassium in Hanjiang district in 2005 were higher than that of 1984 and 1994,and the increasing value was 11.93 g/kg,0.59 g/kg,7.63 mg/kg,12.8 mg/kg and 5.31 g/kg,0.37 g/kg,5.69 mg/kg,21.98 mg/kg respectively.According to some soil fertilizer problems in regional areas,some initial proposals such as establishing soil fertility monitoring sites,straw returning,popularizing formula fertilization technology,etc.were put forward.