陇东旱塬苹果园土壤硝态氮累积特征研究

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关键词苹果园；硝态氮；累积；平凉市中图分类号S661.1文献标识码A文章编号 0517-6611（2025）20-0147-02doi：10.3969/j.issn.0517-6611.2025.20.032

Abstract The distribution and accumulation characteristics of NO3- -N in apple orchards of 40O apple orchards with O-1OO cm soil layer were studiedinJingingZagangigidJianoutisiingagosslateafEsteGsurovie.Tsuldat the average soil NO3- -N content in 0-100 cm soil layer in Jingning，Zhuanglang，Jingchuan and Lingtai Counties was 163.57，78.69，64.49 and （204号 33.14mg/kg ，respectively，the accumulation of NO3- -N in 0-100cm soil layer was 2197.13，1059.59，872.70 and 447.94kg/hm2 ，respectively.The accumulation of NO3- -N in orchard soil profile of Jingning County was the most serious.There was no obvious peak value of NO3- -NaccumulationinsoilprofilesinZuanglangandJingchuanCounties，butJingningCountyshowedthecharacteristicsofdpaccuulationof （204号 NO3- -N.The soil conductivity of 0-100cm soil layer in the orchard of four wunties was ranked from high to low as follows：Jingning County> Jingchuan County>Zhuanglang County>Lingtai.

Key wordsApple orchards; NO3- -N;Accumulation;Pingliang City

黄土高原是我国种植面积最大和总产量最高的新兴优质苹果生产基地。（剩余5618字）