西藏环拉萨地区土壤—牧草—家畜系统中Cu等六种元素含量的分析

CONTENT OF COPPER IRON ZINC MANGANESE MAGNESIUM AND SELENIUM IN SOIL-HERBAGE-LIVESTOCK SYSTEM IN THE REGION AROUND LASA IN TIBET

对西藏环拉萨地区土壤、牧草、家畜 (羊 )被毛中六种元素含量进行了测定。结果表明 :该区土壤、牧草及家畜被毛中Cu、Fe、Zn、Mn、Mg五种元素均不表现缺乏 ,但土壤及牧草中Se含量处于缺乏的临界水平 ,家畜被毛中Se含量低于其缺乏临界值 ,提示该区为低Se生态。

Six elements in soil, herbage and animal (sheep) hair from the region around Lasa in Tibet were analysed. The results indicated that the content of copper, iron, zinc, manganese, magnesium in soil, herbage and animal (sheep) hair was not deficient,but the selenium in soil and grass was at the critical level of selenium-deficiency. Selenium content in sheep hair were under the critical level, and it indicated that sheep herd of the region around Lasa was selenium-deficiency.