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、 SO2-4？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；SO2-4？以每年33 mg？kg？1的速率持续增加。
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
Malhi, S.J., Nyborg, M. and Harapiak, J.T. (1998) Effects of long-term N fertiliz-er-induced acidification and liming on micronutrients in soil and in bromegrass hay. Soil & Tillage Research, 48, 91-100.
