南通市耕地土壤肥力演变趋势及培肥对策

Evolution Trends of Soil Fertility and Countermeasures of Soil Building in Nantong City

对第7次(2012年)"五年一次肥力详查"采集的204个土壤样品进行检测表明,结果显示,2012年南通市耕地土壤有机质、全氮、有效磷、速效钾的平均含量分别为19.5 g/kg、1.25 g/kg、20.6 mg/kg、89.9 mg/kg。与前6次肥力详查结果对比,有机质、全氮、有效磷的含量均呈不断升高趋势,速效钾含量呈先降后升趋势。根据土壤肥力现状,提出了继续培肥地力的措施。

204 soil samples of “five years a fertility survey” which collected in 2012 were analyzed.The results showed that in 2012 cultivated soil organic matter,total nitrogen, available phosphorus,and available potassium content were respectively 19.5 g/kg, 1.25 g/kg, 20.6 mg/kg, 89.9 mg/kg. Compared to the results of first six fertility survey,organic matter,total nitrogen ,and available phosphorus content showed increasing trend,available potassium content showed a rising trend after the first drop.According to the soil fertility status, countermeasures of soil building were put forward.