摘要:
通过监测土壤肥力评价常用的有机质、全氮、全磷、全钾、有效磷、速效钾、pH等7项评价指标,对西安市近郊4个方位的土壤肥力进行了评价。结果表明:在西安市近郊的4个方位上,土壤中pH值普遍在8.5左右,显略碱性;有机质的含量普遍处于稍缺状态,北郊的有机质含量相对比较丰富,最高为2.64%;全氮含量相对较好,全钾含量均处于较缺状态,北郊的全钾含量较高,为4.17g/kg;全磷含量均处于0.66g/kg左右,属中等状态;有效磷含量处于中等含量水平,南郊较低,平均为7.3mg/kg,最低至3mg/kg;速效钾含量东郊为37.93mg/kg,含量较少,处于较缺状态,其余3个郊区均处于稍缺状态。
关键词:
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西安市
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近郊
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土壤肥力
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评价
Abstract:
By evaluation of 7 common indicators for soil fertility monitoring including organic matter, total nitrogen, total phosphorus, total potassium, available phosphorus, available potassium and pH value, the soil fertility in four cardinals of the suburbs of Xi'an City was assessed. The result indicated that in the four cardinals, pH value in soils was generally about 8.5 in a slightly alkaline condition; the content of organic matter appeared generally in a slight shortage, but that in the soils of the north suburbs was relatively richer, with the maximal of 2.64%; the situation of TN content was relatively good; the content of total potassium was all in a lack state, but that in the soils of the north suburbs was comparatively higher as about 4.17g/kg; the TP content was all about 0.66g/kg in a medium state; the content of available phosphorus was in a medium level, but that in the soils of the south suburbs was lower as 7.3 mg/kg averagely, with minimal of 3 mg/kg; the content of available potassium in the soils of the east suburbs was 37.93 mg/kg in a rather lack state, but that in the soils of the other three cardinals of the suburbs was just slightly deficient.
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