丹东市土肥站1997年4月对全市土壤养分调查后公布的数字表明，耕地土壤有机质含量下降状况令人担忧。据了解，约占水田总面积60％的水田，15年未施农家肥，已成为“卫生田”。水稻生产全靠化肥，而过量施用化肥，导致土壤严重板结，地力下降，还引发了稻瘟病等多种病害的发生。 Dandong City Soil Fertilizer Station in April 1997 to the city after the soil nutrients survey released figures show that soil organic matter content decline is cause for concern. It is understood that paddy fields account for about 60% of the total paddy field area, 15 years without applying manure, has become a “health field.” Rice production depends entirely on fertilizers, and excessive application of fertilizers, leading to serious soil compaction, decreased fertility, but also led to the occurrence of rice blast and other diseases.