中国低硒带生态环境中硒的环境行为研究进展

本文综述了目前与低硒带硒生物地球化学循环有关的研究结果。从这些研究中可以看出,低硒带的形成主要由表层土壤对低硒母质层的继承性,演化趋势主要决定于降水输入和淋溶流失二个自然过程的相对通量及土壤对硒的保留程度,后者在很大程度上依赖于土壤铁锰氧化物含量,土壤中硒的挥发损失可能并不重要。土壤-植物系统中硒的小循环中,环境腐植酸物质对土壤硒的环境行为和生物有效性产生了显著影响。

SOME BIOGEOCHEMICAL ASPECTS OF SELENIUM IN CHINESE LOW-SELENIUM BELT

This paper summerized the research results on the biogeochemical aspects of selenium in Chinese low-selenium belt. The lower selenium contents of soil-deriving rocks, the leaching loss, the rain-fall input and stagnation capacity of soils are thought to be the essential factors. Transformation and bioavailability of selenium in soil depends, to a certain extent, on the humification processes.