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自1986年起,农业部全国农业技术推广服务中心在全国典型潮土区开展了耕地土壤的肥力动态监测,以了解潮土区耕地地力的动态变化趋势。1987~2006年的土壤肥力动态监测结果表明,潮土区土壤有机质和全氮含量均有所增加,1987~1997年全国潮土区土壤有机质和全氮含量年均分别增加2.04%和2.59%;1998~2006年全国潮土区土壤有机质含量年均分别增加0.62%,全氮含量年均降低0.39%;土壤有效磷和速效钾含量年均增加0.77%~1.47%和1.61%~2.73%;土壤pH值降低0.28个单位,有酸化的趋势。随着潮土区土壤有效磷和速效钾含量的快速上升,说明可以适当降低磷、钾肥的施用量。
Since 1986, the National Agro-Technology Extension Service Center of the Ministry of Agriculture has carried out the dynamic monitoring of the fertility of cultivated land in the typical tidal region nationwide to understand the dynamic trend of the cultivated land force in the tideland. The results of dynamic monitoring of soil fertility from 1987 to 2006 showed that soil organic matter and total nitrogen content increased in the Chao soil area, and annual soil organic matter and total nitrogen content increased by 2.04% and 2.59% respectively from 1987 to 1997. From 1998 to 2006, the annual organic matter content of the Chao soil increased by 0.62% and 0.39% respectively, while that of soil available phosphorus and available potassium increased by 0.77% ~ 1.47% and 1.61% ~ 2.73% 0.28 units lower pH, there is a tendency of acidification. With the rapid increase of soil available P and available K content in the tide soil, the application rates of P and K could be appropriately reduced.