对天水市麦积区17个乡镇的耕地土壤分区域进行了采样、测定，结果表明，麦积区耕地土壤有机质含量11.35 g/kg、全氮含量0.76 g/kg、全磷含量0.78 g/kg、碱解氮含量56 mg/kg、有效磷含量13.2 mg/kg、速效钾含量224 mg/kg、全钾含量20.3 g/kg；铜含量1.10 mg/kg，有效铁含量8.38 mg/kg、有效锌含量1.12 mg/kg、有效锰含量11.77 mg/kg、有效硼含量0.29 mg/kg。总体评价结果为有机质处于较缺水平，速效磷、有效锌、有效铁、有效锰属于中等水平，碱解氮和有效硼处于缺乏水平，速效钾和有效铜处于丰富水平。全氮、全磷、碱解氮与第二次全国土壤普查结果相比均有不同程度的提高，土壤速效磷上升幅度较大，全钾、速效钾基本持平。

The cultivated siol nutrient of differend region were collected in 17 township streets offices of Maiji district of Tianshui city . The results showed that the content of organic matter and the total N， total P， total K were 11.35 g/kg， 0.76 g/kg， 0.78 g/kg and 20.3 g/kg， respectively； the content of available Cu， available N， available P， available K， available Fe， available Zn， available Mn， available B were 1.10 mg/kg， 56 mg/kg， 13.2 mg/kg， 224 mg/kg、 8.38 mg/kg， 1.12 mg/kg， 11.77 mg/kg and 0.29 mg/kg， respectively . The overall evaluation results should be also taken to the content of organic was in the relative lack level available P、 Zn、 Fe、 Mn was in middle level the available B and available N is in deficient level . The content of available K and available Cu is in abundant level、 Compared with 1982， there were different degrees of improvement， which available P increase largely， the contents of total K and available K nearly no change .

S158.3