【摘要】 采用不同灌溉模式,定期测定了造纸废水灌溉后湿地土壤Cl-,Na+、土壤可溶性盐、土壤呼吸强度及芦苇干重等指标,研究了灌溉过程中土壤中Cl-,Na+迁移以及对土壤的生态改良效应.结果表明:灌溉后土壤Cl-,Na+及可溶性盐分别去除57.7%~70.0%,45.7%~47.1%,53.2%~59.7%;一定范围内,湿地水力负荷、淹水深度变化对土壤降盐效果影响不大,干湿交替灌溉模式对降盐有影响;废水灌溉还能平均提高土壤总氮、土壤有机质含量、土壤呼吸强度和芦苇地上生物量到2.17,1.20,1.46和1.34倍,对盐碱化滨海湿地具有综合的生态修复效应,但不同灌溉工艺之间存在一定差异.更多还原

【Abstract】 The transfer of Cl-,Na+ in soil and the saline-alkali soil eco-remediation effects were researched by periodic measurements of such variables as soil Cl-,Na+,soluble salt,soil respiration rate and dry biomass weight of reed.The results show that the concentration of Cl-decreased by 58 to 70.0%,that of Na+ by 46 to 47% and the soluble salt concentration in the irrigated soil by 53 to 60%.The decreasing salt levels in the soil arre little affected by the hydraulic load;it varies to some extent with the depth of inundation but the levels are largely affected by the dry-wet alternating irrigation mode.After irrigation with waste water,which has complex remediation effects on littoral saline-alkali wetlands,the concentration of total soil nitrogen increased,on average,2.17 times,that of organic mass 1.20 times,the microbial respiration rate increased by 46% and the concentration of reed above ground biomass increased on average 1.34 times.Different irrigation methods resulted in some variation among these results.更多还原