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花斑状铁锰分异是水稻土重要的形态特点之一,这是同水稻土形成过程的特点密切相关的.在种稻淹水期,耕层处于还原状态,促进了机械与化学淋溶作用,由于水分下渗量比较大,粘粒与铁锰等变价元素的淋溶淀积,不论在数量上,也不论在强度上都是任何其它土壤不可比拟的.为了研究铁锰淋溶淀积的特点,我们在研究锈斑与潜育斑铁锰分异的同时,又在每一发生层中按上、中、下五点采样(图1),对其中1、3、5三点土样分别测定其无定形铁、锰与游离铁、锰量,进一步探讨、研究不同水稻土中铁、锰分异的特点,现将结果讨论如下.
The speckled iron-manganese differentiation is one of the important morphological characteristics of paddy soils, which is closely related to the characteristics of the formation of paddy soils. During the paddy flooding period, the plow layer is in a restored state, promoting the mechanical and chemical leaching , Due to the infiltration of relatively large amount of water, clay and iron and manganese and other variable elements of the leaching deposition, both in quantity, regardless of the strength of any other soil incomparable.In order to study the iron and manganese leaching Of the characteristics of our study of rust and latent spot differentiation of iron and manganese at the same time, in each occurrence of the upper, middle and lower five-point sampling (Figure 1), of which 1,3,5 three-point soil samples Respectively, to determine its amorphous iron, manganese and free iron, manganese content, to further explore the characteristics of different paddy soil iron and manganese differentiation, the results are discussed below.