上海松江农田土壤20年养分变化研究

Research on the Farmland Soil Nutrient Changes in Songjiang District of Shanghai in 20 Years

采用2004年上海市松江区耕地质量监测中资料,分析了研究区的土壤养分含量及20年来养分含量的变化。结果表明,近20多年来,研究区土壤已经属于偏酸性土壤,有机质和全氮含量有所下降,土地利用方式变化影响了该土壤有机质含量;研究区土壤有效磷和速效钾含量均明显提高。

Using the monitoring data of the farmland quality in Songjiang District of Shanghai in 2004,the soil nutrient content and its changes in 20 years in this study area were analyzed.The research results showed that the soil in this study area had the trend to be the acidic soil and the amount of organic matter and total nitrogen in this soil decreased in 20 years.The changes of the ways of land use influenced the content of soil organic matter.The contents of the available phosphorus and available potassium had an obvious increase.