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在生命必需微量元素“史记”中,硒发现不算早(1957),但这一发现迅速导致了对一些家畜和家禽缺硒病的认识。例如当饲料中缺硒时,动物会出现肝坏死、肝损害、渗出性素质或肌营养不良等症状,投与硒则可恢复或防止。近年来,世界上有些缺硒国家和地区,采取在饲料中添加硒(0.1-0.2mgSe/kg饲料)的办法,预防动物缺硒病,在经济上收到很好的效果。此外,硒在预防人体癌症、心血管疾病、克山病和大骨节病等方面也很快显露锋芒。
Selenium was not found early in the Shi Ji, an essential trace element of life, (1957), but this finding quickly led to awareness of selenium deficiency in some livestock and poultry. For example, when feed is deficient in selenium, animals may experience symptoms of liver necrosis, liver damage, exudative quality or muscular dystrophy, and selenium may be restored or prevented. In recent years, some countries lacking in selenium in the world adopt the method of adding selenium (0.1-0.2 mgSe / kg feed) to feed to prevent selenium deficiency in animals and receive very good economic results. In addition, selenium in the prevention of human cancer, cardiovascular disease, Keshan disease and Kashin-Beck disease also quickly emerge.