STUDIES ON ECOLOGICAL EFFECTS OF SECONDARY SALINIZATION ON FACILITY CULTURING SOIL AND BIOREMEDIATION

设施栽培农业在我国蔬菜和其他重要的经济作物栽培中发挥了巨大的作用，取得了显著的经济和社会效应，但是由于其大量化肥的施入，特别是氮肥，致使土壤次生盐渍化问题严重突出，土壤中大量的硝态氮给环境和人们的身体健康造成严重威胁。所以开展对于设施栽培农业次生盐渍化研究，对于正确评价土壤环境中次生盐渍化条件下硝态氮迁移转化行为，帮助人们采取合理的整治措施，解决设施栽培土壤次生盐渍化问题具有十分重要的理论和实践意义。本文以设施栽培大棚次生盐渍化土壤为研究对象，开展了硝态氮对土壤微生物生态毒理效应及生物修复研究。主要研究结果如下： 1、随着栽培时间的增加，设施栽培土壤表层土（0~5cm）有机质变化不明显；而土...Facility agriculture has played a huge role in vegetables and other important economic crop cultivation in our country, and won great profit in both economic and social aspect. But large amount of mineral fertilizer used, especially nitrogen, has made soil secondary salinization more serious, and have attracted much attention in recent decades. It is very important to investigate secondary saliniz...学位：理学硕士院系专业：生命科学学院生物学系_动物学学号：2172006115211