【摘要】 本试验采用土壤恒温恒湿培养和土壤中锌的分组方法,研究碳酸钙对土壤中加入锌的形态转化以及 pH 值的影响,进而探讨碳酸钙对有效锌的影响。试验结果证明:碳酸钙可引起土壤pH 值上升,交换态锌下降以及碳酸盐结合态锌增加,从而使有效锌降低。在 CaCO₂含量1%左右时,各种形态锌分布及 pH 值对 CaCO₂增加较为敏感;在1%～7%时,其变化比较缓慢。更多还原

【Abstract】 The investigation,by the fractionating method of soil Zn incubated at cons- tant temperature and humidity with different intervals,was undertaken to study the influences on the forms and transformation of soil Zn and pH value by cal- cium carbonate content9 and try to understand how the calcim carbonate affects on- availability of soil Zn.The results show that calcium carbonate can lead to inc-d reasing of soil pH value and cardonate bound Zn,decreasing of exchangeable Zn and DTPA-Zn.The form distribution of soil Zn and pH value was sensitively affecte- by calcium carbonate in about 1% carbonate content.From 1% to 7% of calcium carbonate contents,the change of soil Zn was slow.The result is valuable in eva luating the influenes on soil Zn by calcium carbonate.更多还原