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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%。
The long-term follow-up monitoring data of soil nutrient content in Jiangyin City from 1981 to 2011 were used to analyze the effects of conventional fertilization and soil testing and fertilizer on soil fertility. The results showed that the traditional fertilization habit with little nitrogen fertilizer and less phosphorus and potassium fertilizer resulted in a long time lack of phosphorus and potassium in soil and a great waste of nitrogen fertilizer in Jiangyin City. Since the implementation of soil testing and formula fertilization, the average contents of soil available phosphorus, available potassium and organic matter Compared with 2007, the content increased by 84.5%, 45.7% and 6.6% respectively, and the total nitrogen content in soil decreased by 5.6% compared with 2007.