离子色谱法测定新乡市大棚菜田土壤中的阴离子

Measurement of the Anion in Vegetable Field Soil of Greenhouse in Xinxiang by Using Ion Chromatography

摘要: 为了研究大棚菜田土壤阴离子的演变特征，采集了不同种植年限(0、5、10、15、20、25、30 a)的大棚菜田0~20 cm土壤样品，用离子色谱法测定了土壤阴离子的含量。结果表明：Cl−、HJCO₃、NO₃、NO₂、 SO^2-₄ 与种植年限极显著相关，其中Cl−在15~30 a期间每年增速为25.72 mg•kg⁻¹左右，是0~15 a增速的9.2倍，到30 a时增加8倍；HJCO₃含量以每年1.7 mg•kg⁻¹的速度降低；NO₃在种植30 a的蔬菜大棚土壤NO₃含量高达到1038 mg•kg⁻¹左右，较没有大棚覆盖的大田增加25.7倍；土壤中NO₂含量的增速为0.85 mg•kg⁻¹•a⁻¹；SO^2-₄ 以每年33 mg•kg⁻¹的速率持续增加。

Abstract: In order to study evolution characteristics of the anion in vegetable field soil of greenhouse, the soil samples of different cultivating years (0 a, 5 a, 10 a, 15 a, 20 a, 25 a, 30 a) were collected, and their anion contents were determined by using ion chromatograph. The results showed that the contents of Cl−,HJCO₃, NO₃ , NO₂ and SO^2-₄ were most significantly correlated with the cultivating years. Annual growth of Cl− content was about 25.72 mg•kg−1 during 15 - 30 a, which was 9.2 times that during 0 - 15 a, and it increased 8 times in 30 a; the content of HJCO₃ was decreased at annual rate of 1.7 mg•kg−1; the content of NO₃ reached about 1038 mg•kg−1 in the soil of 30 a, 25.7 times compared to that in open field soil; annual growth of NO₂ content was 0.85 mg•kg−1; and annual growth of SO^2-₄ content was 33 mg•kg−1.