对研究区的土壤微量元素铜、锌、铁、锰的有效态含量进行了测定分析。选择Arcgis地理信息系统软件，采用Geostatistics Analyst地统计分析模块中的Kriging插值方法，对微量元素的空间变异性进行研究。结果表明，有效态锌平均含量0.50 mg/kg，在甘肃省养分分级标准中占Ⅳ级；有效锰含量平均11.01 mg/kg，有效铜含量1.01 mg/kg、有效铁14.60 mg/kg，在甘肃省养分分级标准中均占Ⅱ级。有效铁是黄羊区最高，张义区最低；有效锰丰乐区最高，清源区最低；有效铜黄羊区最高，张义区最低；有效锌永昌区最高，张义区最低。

The effective state content of soil microelement elements copper， zinc， iron， manganese of the study area was determined， the software of Arcgis geographic information system was selected， the spatial of variability Kriging interpolation method were studied using the statistical analysis module of the Geostatistics Analyst on microelement elements.The results showed that the average of effective state zinc content was 0.50 mg/kg， which classification standard of Ⅳ level in gansu province nutrient， the average of effective manganese content was 11.01 mg/kg， the effective copper content was1.01 mg/kg， the effective iron was 14.6 mg/kg， which classification standard of Ⅱlevel in gansu province nutrient.Among them the highest areas of effective iron content was Huangyang district， Zhangyi district was the lowest； the highest effective manganese content was Fengle district， Qingyuan area was the lowest； the highest effective copper content was Huangyang district， Zhangyi district was the lowest； the highest effective copper content was Yongchang district， Zhangyi district was the lowest .

S159.2

农业部测土配方施肥试点补贴资金项目