论文部分内容阅读
铁、铜和锰以可变的化合价存在于土壤中,是作物的三种主要微量营养元素阳离子。我们巳知微生物和土壤有机质能引起它们氧化态的改变,虽然或多或少地可以肯定土壤有机质中的非腐植物质部分能够引起氧化态改变时的电子转移,但腐植物质在这个过程中的作用还未确叨搞清。为此,本文对金属离子和腐植物质在无菌和不存在非腐植物质条件下的反应进行了研究,对灭菌腐植物质及其带菌的同类腐植物质,描述了它们的特性,并进行了比较。结论是,除了同时有共知的螯合物形成外,腐植物质可单独地改变金属离子的化合价。
Iron, copper and manganese are present in soil at variable valences and are the three major micronutrient cations of crops. We know that microorganisms and soil organic matter cause their oxidation state to change. Although it is more or less certain that the non-humus part of soil organic matter can cause electron transfer when the oxidation state changes, the role of humus in this process Not clear yet. For this reason, the reaction of metal ions and humic substances with or without non-existent humic substances has been studied in this paper, their characteristics have been described for sterilizing humic substances and the same humic substances carrying them, and compared . The conclusion is that in addition to the well-known chelate formation at the same time, humic substances can individually alter the valency of metal ions.