CAJ | 학술논문

为调查辽宁省蔬菜主产区地下水硝酸盐污染现状，于2010-2012年连续3年，分别在每年7月份（雨季）和10月份（雨季后）从辽宁省蔬菜主产区112眼水井采集地下水样品，并利用紫外分光光度法测定其硝酸盐含量。结果表明，所调查的水井中，29％的水井NO 3-N含量超标，39％的水井有潜在污染风险；地下-水NO 3-N含量与水井深度呈显著负相关，井深＜10 m、10～20 m和≥20 m的地下水NO-3-N含量分别为-26.23，17.61和6.81 mg?L-1；雨季（7月份）NO-3-N含量超标频数高于非雨季（10月份）；硝酸盐含量与施氮量呈线性相关，当纯氮年投入量超过322.9 kg?hm-2时，易造成地下水NO 3-N含量超标。
위조사요녕성소채주산구지하수초산염오염현상，우2010-2012년련속3년，분별재매년7월빈（우계）화10월빈（우계후）종요녕성소채주산구112안수정채집지하수양품，병이용자외분광광도법측정기초산염함량。결과표명，소조사적수정중，29％적수정NO 3-N함량초표，39％적수정유잠재오염풍험；지하-수NO 3-N함량여수정심도정현저부상관，정심＜10 m、10～20 m화≥20 m적지하수NO-3-N함량분별위-26.23，17.61화6.81 mg?L-1；우계（7월빈）NO-3-N함량초표빈수고우비우계（10월빈）；초산염함량여시담량정선성상관，당순담년투입량초과322.9 kg?hm-2시，역조성지하수NO 3-N함량초표。
In order to survey the nitrate pollution status of groundwater in main vegetable production areas of Liaoning Province, water samples were collected from 112 wells in July (rainy season) and October (after rainy season) from 2010 to 2012, and the nitrate contents of samples were determined by ultraviolet visible absorption spectrophotometry (TU-1810 DASPC).The results showed that nitrate content in 29% of samples was beyond the national standard , and 39% of samples exhibited potential environmental risk .Based on well depth, it was shown that the nitrate contents were 26.23, 17.61 and 6.81 mg? L-1 for groundwater with depth <10 m, 10 ~20 m and ≥ 20 m, respectively, and there was a negative correlation between nitrate content and well depth .The nitrate pollution status was more severe in July than that in October .In addition, a linear correlation was observed between nitrate content of samples and nitrogen input from fertilization .According to the national water quality standard , the annual input of total nitrate should not exceed 322.9 kg?hm-2 .