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对10个有代表性的不同土类样品分别用0.1molHCl和DTPA浸提剂联合提取有效性Cu,Zn,Fe,Mn。结果表明:Cu相近,0.1molHCl测Zn比DTPA结果高出二倍,测Fe没有相关性,而Mn却有很高正相关(0.98)。
Ten representative soil samples were extracted with 0.1mol HCl and DTPA extractant to extract Cu, Zn, Fe and Mn respectively. The results showed that Cu had a nearly doubled Zn content when measured with 0.1 mol HCl compared with DTPA. Fe was not correlated with Fe, but Mn had a high positive correlation (0.98).