论文部分内容阅读
(一)红壤性水稻土中铁、锰的含量以淀积层最高,潜育层最低。铁、锰在土层中的分化程度,随土壤发育的程度而增加;锰的分化趋势,较铁更为明显。(二)能被氢醌还原的锰量,占全锰中的很大百分数,最高者可达70%,而能被氢醌还原的铁量,不超过全铁量的0.5%。能与 EDTA 形成络合物的锰量,也较铁量为高。(三)土壤经交互干湿处理以后,酸溶性和易于还原的铁、锰数量都大大降低,说明脱水作用可使铁、锰的活动性减低。(四)作者根据试验结果而认为,锰对氧化还原条件的感应较为灵敏,而铁则对酸碱条件较为敏感,这对于水稻土剖面中铁、锰的移动和分化具有一定意义。铁、锰的移动程度,在一定程度上可作为水稻土发育程度的一个指标。
(I) The content of iron and manganese in red paddy soil is the highest in sedimentary layer and the lowest in larvae. The degree of differentiation of iron and manganese in the soil layer increased with the degree of soil development; the trend of manganese differentiation was more obvious than that of iron. (B) Manganese, which can be reduced by hydroquinone, accounts for a large percentage of total manganese, the highest being up to 70%, while the amount of iron capable of being reduced by hydroquinone does not exceed 0.5% of the total amount of iron. The amount of manganese that forms complexes with EDTA is also higher than that of iron. (C) After the soil is treated by the interaction of wet and dry, the quantity of iron and manganese that are acid-soluble and easily reduced are greatly reduced, indicating that dehydration can reduce the activity of iron and manganese. (4) Based on the experimental results, the author believes that manganese is more sensitive to redox conditions, while iron is more sensitive to acid and alkali conditions, which is of certain significance for the movement and differentiation of iron and manganese in the paddy soil profile. The movement of iron and manganese can be used as an indicator of the degree of paddy soil development to a certain extent.