长期施肥对江阴市土壤肥力的影响

利用1981—2011年间江阴市土壤养分含量的长期跟踪监测数据,分析传统施肥和测土配方施肥对土壤肥力的影响。结果表明,氮肥多、磷钾肥少的传统施肥习惯导致江阴市长期土壤磷、钾含量缺乏和氮肥的大量浪费;实施测土配方施肥以来,江阴市2011年土壤有效磷、速效钾、有机质的平均含量比2007年分别提高了84.5%、45.7%、6.6%,土壤全氮含量比2007年下降5.6%。

Effects of Long Term Fertilization on Soil Fertility in Jiangyin City

Based on observed data of soil fertility in Jiangyin City from 1981 to 2011,the effects of traditional fertilization and soil testing and formulated fertilization on soil fertility were analyzed.The results indicated that the traditional method of fertilization not only caused the deficiency of phosphorus and potassium but also the waste of nitrogen fertilizer.After the implementation of soil testing and formulated fertilization in Jiangyin,soil available phosphorus,soil available potassium and soil organic matter increased by 84.5%,45.7% and 6.6% respectively,soil total nitrogen decreased by 5.6%.