Mehlich 3-ICP法快速测定土壤有效磷的研究  

Research of Mehlich 3-ICP for Soil Available P

作　　者：崔建宇[1,2] 宋建兰[1,2] 薛会英[3] 夏晓平[1,2] 江荣风[1,2] 

机构地区：[1]中国农业大学资源与环境学院,北京100193 [2]教育部植物-土壤相互作用重点实验室,北京100193 [3]西藏农牧学院,西藏林芝860000

出　　处：《土壤通报》2011年第2期388-392,共5页Chinese Journal of Soil Science

基　　金：农业部948资助项目(2003-Z53)I资助

摘　　要：选取59个典型的土壤样品进行研究,比较了Mehlich 3-ICP法与常规方法测定土壤有效磷结果之间的差异,为其在土壤测试方面的应用提供科学依据。结果表明,Mehlich 3-ICP法测定不同类型土壤有效磷与常规方法之间的相关系数r达到0.959＊＊~1.000＊＊,均呈极显著相关性。对于Mehlich 3方法提取的土壤有效磷,采用ICP-AES法与钼锑抗比色法的定量结果之间r值为0.999＊＊,达到极显著水平。ICP-AES法测定结果约是比色法的1.18倍,这可能与ICP定量的磷中不仅包括了无机磷的浓度,还包括少量的有机态磷有关。59 typical soil samples collected from different regions in China were studied to compare the difference between the results of Mehlich 3 and routine methods for soil available P.The results showed that Mehlich 3-ICP method produced highly significant correlations（r = 0.959＊＊-1.000＊＊） with routine methods for soil available P.For the P amount extracted by Mehlich 3,the results showed that the highly significant relationship（r = 0.999＊＊） existed between ICP-P and colorimetric P.The form of P detected by ICP-AES included both of soluble non-organic and some organic,which caused the value of ICP-P was 1.18 times to that of colorimetric P.

关 键 词：Mehlich3-ICP 土壤有效磷 常规分析方法 浸提剂 

分 类 号：S151.9[农业科学—土壤学]