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硒是人和动物必不可少的一种微量元素.近年来人们对采用什么样的方法、手段,以提高饲草饲粮的硒含量做了大量的工作。Gissel—Nielsen 对丹麦二十个低硒牧区进行饲料加硒、土壤施硒肥、植株叶面喷硒试验,结果以叶面喷硒效果好。新西兰报导在牧草上喷硒,三个月内牲畜能食入75—80%的硒,并可预防白肌病。有人试验表明,幼龄谷物叶面喷硒5g/ha 是有效的,未发现在生态系统中有硒的积累。
Selenium is a trace element indispensable to human beings and animals, and in recent years, people have done a great deal of work on the methods and means to increase the selenium content of fodder fodder. Gissel-Nielsen carried out selenium-enriched feedstuffs, selenium fertilizers on the soil and leaf selenium spraying tests on 20 low-seine pastoral areas in Denmark. New Zealand reported spraying selenium on herbage, giving livestock 75% to 75% of selenium within three months and preventing white muscle disease. It has been experimentally shown that spraying 5g / ha of selenium on young leaves is effective, and no accumulation of selenium has been found in the ecosystem.