三种土壤有效磷测定方法相关性的研究

Research on Correlation of Three Analytic Methods of Soil Available Phosphorus

本文采用三种土壤有效磷测定方法测定采集土壤样本有效磷含量,研究三种测定土壤有效磷方法测定有效磷含量的相关关系。结果表明:Olsen-P法测定的土壤有效磷含量平均值为Bray-P法1.36倍,二者呈极显著相关关系;Olsen法、Bray法和M3法测定的土壤有效磷含量都具有良好的相关性。运用数理统计对M3法与经典方法测定的土壤有效磷含量相关性进行结果分析,了解M3法与Olsen法、Bray法间的相互关系及其有效性,为M3法推广及以M3法为标准充分挖掘经典Olsen法和Bray法测定有效磷数据信息提供理论参考。

Three analytic methods determined available phosphorus contents of soil samples were adopted in the paper to study correlation of these methods. Results showed that mean value of Olsen-P method assaying phos- phorus contents was 1.36 times of that of Bray-P method, and they were very significant correlated. Both Olsen-P method, Bray-P method and M3 method were well correlated. Correlation between M3 method and classic methods were analyzed with mathematical statistics method, which was helpful to clarify mutual relation of available phospho- rus contents by three analytic methods and their availability. This provides reference for widespread of M3 method and fully excavate available phosphorus values determined by Olsen-P method, Bray-P method using M3 method as criterion.