选取山东省典型设施栽培区——寿光大棚蔬菜为研究对象,采用原状土柱系统研究了农户常规栽培措施下硝态氮的淋失状况.研究发现,黄瓜和苦瓜生育期内硝态氮的淋失浓度范围为40.7 ～74.7 mg/L,试验期间硝态氮淋失浓度平均为53.4 mg/L,所有样品中的硝态氮含量均超过国家规定的饮用水标准和地下水源硝态氮控制标准；冬季硝态氮淋失浓度高于其它季节.硝态氮淋失量为276.24 kg/hm2,除第一次移栽灌溉外,硝态氮淋失量最高出现在2011年3月份.%Selecting the typical vegetable varieties cultivated in the greenhouse in Shouguang of Shandong province as the studied object, the author analyzed the nitrate - N leaching loss in the conventional cultivation by undisturbed soil core lysimeter system. The study found that the leaching loss concentration of nitrate - N in the growing period of cucumber and balsam pear ranged from 40. 7 to 74.7 mg/L, with the average value of 53.4 mg/L. The nitrate -N content in all samples exceeded the national standard for drinking water and the nitrate - N control standard for the groundwater source. The leaching loss concentration of nitrate - N in winter was higher than that in other seasons. The nitrate - N leaching loss amount was 276. 24 kg/hm2, in addition to the first transplanting irrigation, the highest amount of nitrate - N leaching loss appeared in March, 2011.
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