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Mehlich 3(M3)浸提剂是一种适合于不同类型土壤、能浸提不同有效态元素的通用浸提剂,而茶园土壤是一类较特殊的酸性土壤,它的强酸性、富铁铝等特性,是否适用M3浸提方式,国内鲜有报导。本文通过对目前较普遍适用茶园土壤的浸提方法与M3浸提剂相比较,结果表明M3浸提茶园土壤各元素有效态含量要高于常用浸提方法,K、Ca、Mg、Cu、Zn、Mn、Cr等元素含量结果相差不大,但Fe含量相差3倍,B、Cd等元素含量结果相差7～8倍,且各元素有效态含量呈极显著正相关。对M3方法及电感耦合等离子体光谱仪(ICP)精密度测定后认为M3方法结合ICP测定精密度高,结果稳定可靠。
Mehlich 3 (M3) extractant is a universal extractant suitable for different types of soils and can extract different effective elements. Tea plantation soil is a kind of special acid soil. Its strong acidity, iron-rich aluminum And other characteristics, is it suitable for M3 leaching method, rarely reported in China. The results showed that the effective content of each element in M3 leaching tea soils was higher than that of common leaching method, and K, Ca, Mg, Cu, Zn , Mn, Cr and other elements content difference is not big, but the content of Fe difference of 3 times, B, Cd and other elements of the results of a difference of 7 to 8 times, and the effective content of each element was extremely significant positive correlation. After the method of M3 and the ICP precision measurement, it is considered that the method of M3 combined with ICP has high precision and the result is stable and reliable.