灌溉造纸废水对模拟芦苇湿地土壤中镁离子含量的影响

Effects of irrigation with papermaking wastewater on magnesium ions in simulated reed wetland soil

为研究造纸废水对模拟芦苇湿地土壤中镁离子含量的影响,利用造纸废水灌溉辽宁双台河口芦苇湿地,通过不同灌溉时期以及不同废水质量浓度对土壤剖面中镁离子含量进行观测分析。结果表明：在所有处理条件下,土壤镁离子含量随土层深度增加的变化趋势基本相同,呈＂W＂形分布,5~10cm土层中含量最多,20~40cm土层中含量最少。在芦苇不同生长期内灌溉造纸废水,土壤中镁离子含量变化量的大小顺序为成熟期〉发芽期〉展叶期〉快速生长期〉抽穗期。灌溉不同质量浓度的造纸废水后,土壤中镁离子含量变化量的变化趋势300mg/L〉175mg/L〉50mg/L〉CK,说明造纸废水灌溉有助于土壤中镁离子的累积,废水质量浓度越高,镁离子累积量越大。

To study the effect of papermaking wastewater irrigation on simulated reed wetland soil magnesium ion content in Shuangtaihekou Reed Wetland,observation and analysis of magnesium ion content in the soil profile were conducted under different periods and different concentrations of wastewater irrigation＇s.The results showed that：Under all the treatment conditions,the trend of magnesium ion content in the soil was basically the same with soil depth,which was a＂W＂shaped distribution.Magnesium ion was most abundant at 5-10 cm soil depth and was lowest at20-40 cm soil depth.Wastewater irrigation on different growth period in simulated reed wetland,magnesium ion content in the soil was in the order of Maturity GerminationLeaf stage Rapid growth Heading stage.Results from irrigation with different concentrations of wastewater showed that papermaking wastewater irrigation increased magnesium ions content in soil,and the higher the concentration of papermaking wastewater,the greater the cumulative amount of magnesium ions.