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选择了浙江省潜育、铁渗、铁聚和简育4类水耕人为土,采用田间观察与化学分析结合的方法比较研究了水田返旱种植蔬菜、苗木后土壤剖面形态学特征和铁、锰氧化物化学形态组成的变化。结果表明:水田返旱后,土壤冬季地下水位下降;铁锰新生体的剖面形态变化大于化学组成的变化,水耕表层的变化大于水耕氧化还原层的变化,铁锰无定形氧化物和络合态氧化物的变化明显大于其游离氧化物和全量的变化。总体上,返旱后水耕表层的铁锈根孔、鳝血斑数量明显减少甚至消失,无定形铁、铁的活化度、络合态铁和水溶性铁显著下降,而水耕氧化还原层的变化较小。
Four types of hydroponic artificial soil such as submersion, iron infiltration, iron enrichment and simple breeding were selected in Zhejiang Province. Field observation and chemical analysis were used to compare the morphological characteristics of soil profile after planting paddy field with vegetable and seedling, Change of chemical composition of manganese oxide. The results showed that after paddy field returned to drought, the soil water table decreased in winter; the morphological changes of ferromanganese newborn were more than the changes of chemical composition, the changes of hydroponic surface layer were greater than those of hydrous redox layer, The change of compound oxide is obviously greater than the change of its free oxide and total amount. In general, the number of rust root holes and eel blood spots on hydroponic surface obviously decreased or even disappeared after the drought-recuperation, while the activity of amorphous iron and iron, the content of chelated iron and water-soluble iron decreased significantly, Change is small.