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用White提出的方法,对华北地区26个土壤样本进行锌的形态分组测定。结果表明:土壤交换态锌(EXC—Zn)平均含量均<0.05ppm;碳酸盐结合态锌(CA—Zn)为0.22ppm;三氧化物结合态锌(R_2O_3—Zn)为2.78ppm;有机质结合态锌(OM—Zn)为1.20ppm;残渣态锌(RES—Zn)为37.2ppm。除RES—Zn与CA—Zn之间未达显著水平外,各形态锌之间相关均达5％或1.0％显著水平;DTPA浸提的有效Zn与CA—Zn和OM—Zn呈显著正相关。各形态锌的有效锌有待进一步研究。
Using the method proposed by White, the morphological subgroups of zinc in 26 soil samples of North China were determined. The results show that the average content of soil exchangeable zinc (EXC-Zn) is less than 0.05ppm, the content of carbonate bound zinc (CA-Zn) is 0.22ppm, the content of trioxide bound zinc (R_2O_3-Zn) The bound zinc (OM-Zn) was 1.20 ppm; the residual zinc (RES-Zn) was 37.2 ppm. Except for the significant difference between RES-Zn and CA-Zn, the correlation between each form of zinc reached a significant level of 5% or 1.0%. The available Zn of DTPA extract was positively correlated with CA-Zn and OM-Zn . All forms of zinc effective zinc needs further study.