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以宝应县2005年测土配方施肥数据为基础,结合1984年、1989年、1994年、2000年土壤普查数据,分析了宝应县土壤养分(有机质、有效P、速效K)变化趋势。结果发现:20年来,土壤有机质、有效P、速效K含量具有相似的变化规律,属典型的“V”型变化结构,即1984—1994年土壤有机质、速效K含量呈下降趋势,有效P含量呈稳定趋势;1994—2005年土壤有机质、有效P、速效K含量均呈上升趋势,且都达到或超过第二次土壤普查养分水平。且土壤有机质、有效P空间分布差异明显,速效K空间分布稳定。不同土壤类型的土壤有机质、有效P含量均呈上升趋势,速效K含量呈稳定趋势。土壤养分上升幅度大小为:有效P>有机质>速效K。
Based on the soil testing and fertilization data of Baoying County in 2005 and the soil census data of 1984, 1989, 1994 and 2000, the change trend of soil nutrients (organic matter, available P and available K) in Baoying County was analyzed. The results showed that the content of soil organic matter, available P and available K had similar changes in 20 years, which belonged to the typical “V” type structure, that is, the contents of soil organic matter and available K decreased from 1984 to 1994, and the effective P The contents of soil organic matter, available P and available K increased from 1994 to 2005, and both reached or exceeded the level of the second soil survey. The spatial distribution of soil organic matter and available P was obviously different, and the available K was stable. The contents of soil organic matter and available P in different soil types all showed an upward trend while the available K content showed a stable trend. Soil nutrient up the size of: effective P> organic matter> available K.