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三个红壤性水稻土的有机质和腐殖质的含量由淹育型水稻土→潴育型水稻土→潜育型水稻土依次逐渐增加,其C/N和H/P比值也顺次增大。它们的粘土矿物组成无明显差异。铁、锰物质在潴育型水稻土剖面中分异最明显,其次为淹育型水稻土;而无定形氧化铁在剖面中变幅最大却是潜育型水稻土;结晶态铁在土壤剖面中分异亦有一定规律,其中潴育型水稻土的指示性土层(W层)的晶胶率(结晶铁/无定形铁)远较其它土层为高,这种变化特性的差异,对区分不同水分作用的水稻土发育类型有一定的特殊意义;土壤络合态铁与土壤有机质含量有关。土壤氧化锰与土壤氧化铁相比虽然含量低,但对土壤氧化还原条件反应更加敏感,所以在土壤剖面中淋移趋势更加明显。
The contents of organic matter and humus in the three red paddy soils increased gradually from flooded paddy soil → reed soil to sowing paddy soil, and the ratios of C / N and H / P also increased. Their clay mineral composition no significant difference. Iron and manganese were the most obvious in the paddy-paddy soil profiles, followed by submerged paddy soils. However, the largest amplitude of amorphous iron oxides in the profiles was the latent-type paddy soils. There is also a certain law in the differentiation. The gelatinization rate (crystalline iron / amorphous iron) in the indicator soil layer (W layer) of the paddy-type paddy soil is much higher than that of other soil layers. This difference in characteristics, It is of special significance to distinguish the different types of paddy soils under different water regimes. Soil complexed iron is related to soil organic matter content. Although soil manganese oxide has a lower content than soil iron oxide, it is more sensitive to soil redox conditions and therefore tends to leach even more in soil profiles.