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中文摘要：
目的：对固原市原州区耕地土壤养分变化趋势进行研究。方法：利用土壤养分常规分析方法，测定了原州区耕地土壤养分，并将测量结果与全国二次土壤普查结果进行了比较。结果：发现土壤有机质平均含量达14．44g／b，增加了24．38％；全氮平均含量为0．998g／kg，增加了23．36％；碱解氮平均值68．83mg／kg，增加了96．04％；有效磷平均含量5．82mg／k，增加了30．49％。结论：固原市原州区耕地土壤有机质、全氮、碱解氮、有效磷含量呈现出增加趋势，有效钾含量变化不大，土壤总体养分仍然属于低下水平。
英文摘要：
Objective：To study soil nutrient variation trend in Yuanzhou county of Guyuan city. Methods：Using the conven- tional analytical method for the measurement of soil nutrients and measured Soil nutrient content in Yuanzhou county of Guyuan city, the results with the national the secondary soil survey results were compared. Results：Found the average con- tent of soil organic matter reaches 14.44g/kg, increased by 24.38% ;total nitrogen the average content is 0. 998g/kg, in- creased by 23.36% ;alkaline hydrolysis nitrogen the average is 68.83mg/kg,inereased by 96.04% ;available phosphorus in the average levels of 5.82 mg/k,increase of 30.49%. Conclusion ：The cultivated land soil organic matter, total nitrogen, a- vailable nitrogen, available phosphorus content showed a tendency to increase, available potassium content changed little, and the overall soil nutrients still belongs to the lower level in Yuanzhou county of Guyuan city.
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