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本文研究了江苏里下河地区低湿地土壤上发育的水稻土铁还原酶活性特征与氧化铁的形态、铁的活化及水稻土的发育度之间的关系。结果表明,所有供试土壤剖面的耕层的铁还原酶活性都较高,不同发育度的水稻土具有不同的剖面分布规律。脱潜型水稻土剖面上下层铗还原酶活性均较高,且有随深度增加而上升的趋势,而脱潜潴育型水稻土则随深度而下降。铁还原酶活性是与土壤通气、透水、氧化还原状况、氧化铁活化度、有机质含量等理化性状有密切关系的综合性生物学参数。它在一定程度上能反映低湿地水稻土的发育度。此外,本文还对铁还原酶活性的测定方法作了探索,尝试性地提出了自然铁还原酶活性的概念。自然铁还原酶活性的测定,简便易行,洲定时条件较为接近田间实际状况。
In this paper, we studied the relationship between iron reductase activity and iron oxide morphology, iron activation and paddy soil development in paddy soil grown on lowland wetlands in Lixiahe, Jiangsu Province. The results showed that the iron reductase activity in topsoil of all tested soil profiles was high, and paddy soil with different developmental degrees had different profiles. The activities of 铗 reductase in the upper and lower layers of the de-escaped paddy soil profile were both higher, with the depth increasing, but the desorption retention paddy soil decreased with depth. Iron reductase activity is a comprehensive biological parameter closely related to soil aeration, water permeation, redox status, iron oxide activation degree, organic matter content and other physical and chemical properties. To a certain extent, it can reflect the development of paddy soils in low-moisture areas. In addition, this article also explored the determination of iron reductase activity, tentatively put forward the concept of natural iron reductase activity. Determination of natural iron reductase activity, simple and easy, the state timing conditions are more close to the actual field conditions.