土壤一植物系统硒的生态传输链是环境—人硒关系的中间环节,因而,这一传输链的研究是改良低硒环境、预防硒反应症的基础。自本世纪30年代确定硒中毒是美国中西部广大地区家畜碱性病和盲目蹒跚病的主要病因以来,尤其是50至60年代确定硒缺乏是家畜白肌病等一系列动物硒反应症的基本病因以来。世界各国对土壤硒和作物硒都进行了大量的研究。我国克山病和大骨节病与缺硒关系的发现及70年代以来世界环境问题的提出,更加强了人们对环境中硒的关注。其中关于土壤和植物中硒的研究,主要是从三方面进行的:通过宏观区域调查,研究土壤和植物含硒量的分布及二者的关系;通过盆栽试验,研究土壤在人为加硒条件下作物对硒的吸收及化肥或其他元素对吸收的 Therefore, the study of this transmission chain is the basis for improving selenium environment and preventing selenium response. Since the seventies of this century to determine selenium poisoning is a major cause of domestic animal alkalosis and blind faltering disease in the vast Midwestern United States, especially since the 50s and 60s to determine selenium deficiency is the cause of a series of animal leukomyosis and other basic causes of animal selenium response . Many countries in the world have done a lot of research on soil selenium and crop selenium. The discovery of the relationship between Keshan disease and Kashin-Beck disease and the deficiency of selenium in our country and the proposal of the world environmental problems since the 1970s further strengthened people’s attention to selenium in the environment. Among them, the researches on selenium in soils and plants are mainly carried out in three aspects: the distribution of selenium in soils and plants and the relationship between the selenium content in soils and plants are investigated through macroscopic regional surveys; and the pot experiments are conducted to study the effects of artificial selenium Crops absorb selenium and absorb nutrients or other elements