新民市耕地土壤pH、有机质和养分变化趋势研究

Research on pH,Organic Matter and Nutrient Change Tendency of Farmland Soil in Xinmin City

为了全面掌握新民市耕地土壤状况,提高耕地建设管理和科学施肥水平及指导农业生产,通过对辽宁省新民市1 746个耕地土壤样品pH、有机质、碱解氮、有效磷、速效钾5项指标进行检测与调查,系统分析了从1982年第2次土壤普查到2012年近30年来全市耕地土壤肥力变化趋势。结果表明:自1982年至2012年,新民市耕地土壤pH已出现明显的下降,有机质含量总体水平下降,碱解氮、有效磷和有效钾含量总体水平显著提高,此结果为提高耕地建设和科学施肥提供依据。

In order to study the farmland soil in Xinmin city and improve the level of arable land, construction management and scientific fertilization to guide the agricultural production, through detection and investigation for 5 indicators including pH,organic matter,nitrogen, available phosphorus, available potassium of 1 746 soil samples in Xinmin city of Liaoning province, farmland soil fertility change tendencies were analyzed nearly 30 years from the second soil census in 1982 to 2012,and it was expected to provide basis to improve farmland construction and fertilize scientifically.