里下河农区主要土壤养分变化趋势分析——以江苏省宝应县为例  

Research on Trend of Main Soil Nutrients in Lixiahe Agricultural Zone──A Case Study of Baoying County of Jiangsu Province

作　　者：毛伟 姜义 徐桂红 程忠波 陈明 

机构地区：[1]扬州市土壤肥料站,江苏扬州225001 [2]宝应县土壤肥料站,江苏宝应225800

出　　处：《土壤》2011年第5期729-735,共7页Soils

基　　金：农业部耕地地力调查专项项目和江苏省农业三项工程项目(SX(2009)61)资助

摘　　要：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 data of soil testing and formulated fertilization in 2005 with the data of soil survey in 1984, 1989 and 2000, the changing trends of soil nutrients such as organic matter, available P and K was studied in Baoying City. The results indicated that there were similar changing trends for soil organic matter, available P and K. Soil organic matter and available K decreased but available P changed less from 1984 to 1994. Soil organic matter, available P and K increased from 1994 to 2005, which were significantly higher than the data of the second soil survey. Spatial distributions in these years were different for soil organic matter and available P but similar for available K. In different soil types, organic matter and available P increased while available K changed less. The increasing range of soil nutrients was in an order of available P 〉 organic matter 〉 available K.

关 键 词：里下河农区 土壤有机质 有效磷 速效钾 

分 类 号：S158.3[农业科学—土壤学]