青海三角城牧场牧草微量元素含量研究

测定了青海三角城牧场牛羊主要采食的18种牧草中与动物健康密切相关的14种微量元素含量，并对牧草质量进行了评价。结果表明，Zn、Mg、Se、Mn等微量元素含量较低，当地羊群地方病与此有关；其它营养元素含量相对正常；有害元素Pb、Cd、As、Hg含量较低。比较去离子水洗涤和非洗涤的牧草，两者微量元素含量无明显差异，说明在青藏高原洁净的自然环境下，牧草所粘附泥土及其它杂质很少。

Study on Trace Elements in Herbage of Pasture of Sanjiao City in Qinghai Province

The content of trace elements in herbage was closely correlated with the health of animals.The content of fourteen kinds trace elements of the main eighteen species herbages of Sanjiao city in Qinghai province was determined.The result showed that the content of zinc,magnesium,selenium,manganese was lower than normal range,the absence of these elements would lead the sheep endemics,and the content of other nutritious trace elements was normal.The content of poisonous trcae elements was in secure range.In addition, the content of the trace elements in herbage washed with deion-water and unwashed herbage in the pasture was not significantly different.It indicated the environment of Qinghai-Tibet platean was not polluted and the herbage flourished here,then the dust and other impurities adhered on the herbage grown in air were little.