校园生活污水灌溉对农田土壤的影响

Influence of Campus Life Sewage Irrigation on Farmland Soil

以非污灌区土壤为空白对照,分别就距污水口不同距离、同一样点不同深度的土样进行土壤理化性质分析及重金属浓度变化监测。结果发现,取山西农业大学校园生活污水直接灌溉校园试验田后,污灌区土壤p H值变化不大,肥力增强,作物长势良好,但土壤易板结,含盐量增大,出现部分重金属富集现象,且重金属迁移会受土壤深度及距离污水源远近的影响,其中,土壤中重金属浓度会随土壤深度的递增而逐级递减。

To understand the effects of sewage irrigation on soil in the campus life, the paper took the soil in non sewage irrigation area as a blank, and the soil samples with the different distance from sewage source, and the different depth were used to monitor the soil physical and chemical analysis. The results showed that after the campus life sewage of the Shanxi Agricultural University was taken directly to the campus experiment field, the p H value little changed, fertility enhanced, and crops were growing well, but the soil hardened, salt content increased, part of the heavy metals enrichment phenomenon appearred. The soil migration of heavy metals was influenced by depth and distance from the source of sewage, and was accompanied by a gradual decline with increasing soil depth.