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采用马义兵等修正的连续浸提分析方法研究了石灰性紫色土铁的形态组成及两种铁源的铁在土壤中的形态转化。结果表明,石灰性紫色土中的欣主要以残渣态存在,占全欣的97～98％,次为三二氧化物结合态,其它形态均很少。施入石灰性紫色土中的Fe~(2+)主要向交换态、碳酸盐结合态、三二氧化物结合态和残渣态转化。YATE—Fe易以交换态存在,而FeSO_4中的Fe易以三二氧化物结合态存在,且施入的Fe~(2-)主要以残渣态和三二氧化物存在,两者合计占66.5～88.6％,表明Fe~(2-)施入石灰性紫色土易被氧化固定。
The continuous extraction analysis method of Ma Bingbing was used to study the morphological composition of lime purple soil iron and the morphological transformation of two iron sources in soil. The results show that the hinterland of limestone purple soil is mainly in the residual state, which accounts for 97-98% of the total Xinxin and secondary is the trioxide-bound state, with little other forms. Fe ~ (2+) applied to calcareous purple soil mainly transforms into exchangeable state, carbonate-bound state, trioxide-bound state and residual state. YATE-Fe is easy to exchange state, while FeSO_4 is easy to exist in the trioxide-bound state, and Fe ~ (2-) is mainly present in the residual state and the trioxide, accounting for 66.5 ~ 88.6%, indicating that Fe ~ (2-) applied to lime purple soil easily oxidized and fixed.