内蒙古草地牧草中氟（F）、硒（Se）含量及分布的调查研究

The Preliminary Investigation on Contents and Distributionof Fluoride(F) and Selenium(Se)in Grassland Herbage of NeiMenggu

本文通过内蒙古草地上，四个地带性草地类型十个调查区域的１５４份优良牧草中，氟、硒的含量及分布调查分析表明：在草甸草原中氟、硒含量分别为０．０２ｍｇ／ｋｇ、０．０７ｍｇ／ｋｇ，在典型草原中氟硒含量分别为０．０１ｍｇ／ｋｇ，０．１４ｍｇ／ｋｇ，在荒漠化草原中氟硒含量分别为０．０２ｍｇ／ｋｇ，０．０９ｍｇ／ｋｇ，在草原化荒漠中氟硒含量分别为０．０７ｍｇ／ｋｇ，０．１０ｍｇ／ｋｇ．全区草地上生长的１６种牧草中，两项元素均被检出，但含量都比较低，经数理统计，四个地带性草地类型中氟和硒含量差异都不明显．研究氟和硒在牧草中的含量，对于环境化学，地方病防治和我区富牧业生产有一定的参考意义．

n present study,the contents and distribution of F and Se in 154 samples of fine herbage inten investigating areas of four district steppe types of NeiMenggu grassland were analysed and in-vetigated. The results indicated that the conterits of F and Se in herbage were 0. 02 mg/kg and 0.07 mg/kg respectively in meadow steppe,0.01 mg/kg and 0. 14 mg/kg respectively in typicalsteppe,0. 02 mg/kg and 0. 09 mg/kg respectively in desert steppe and 0. 07 mg/kg and 0.10 mg/kg respectively in steppe desert. The positive results of two kinds of elements were ob-tained by examining 16 kinds of herbage in all NeiMenggu grassland,but the contents were rela-tively low. There were no significant differences of contents of F and Se among different districtsteppe types by data statistics. The investigaticn of F and Se contents in herbage has some signifi-cance on environmental chemistry, local disease protection and animal industry production ofNeiMenggu.