硒是生态环境中一种十分重要的微量元素 ,我国有些地方病如克山病、大骨节病等 ,都与人体内缺硒密切相关。早已有研究证实 ,土壤和饲料缺硒 ,会使牲畜产生白肌病等多种疾病 ;近期研究指出 ,食物和饮水中缺硒 ,会导致人体心血管疾病的发生和婴幼儿的猝死症。对土壤和植物施硒 ,? Selenium is a very important trace element in the ecological environment. Some endemic diseases such as Keshan disease and Kashin-Beck disease in our country are closely related to selenium deficiency in the human body. Earlier studies have confirmed that selenium in soils and feedstuffs can cause many diseases such as white muscle disease in livestock. Recent studies have pointed out that lack of selenium in food and drinking water will lead to the occurrence of cardiovascular diseases and sudden death in infants and young children. Selenium on the soil and plants,?