环境工程学报2025，Vol.19Issue(5)：1153-1165,13.DOI:10.12030/j.cjee.202407032
Fe-耐盐功能菌群联用对盐碱地的改良效果
The improvement effects of the combined Fe-salt-tolerant microbial system on saline-alkali soil
摘要
Abstract
When a single improvement measure fails to achieve the desired remediation effect for saline-alkali soil,the integrated application of multiple remediation strategies has gradually become a key direction for saline-alkali land improvement.This study constructed a combined remediation system of Fe and salt-tolerant functional microbial communities.By combining soil cultivation experiments with 16S rRNA gene high-throughput sequencing technology,we systematically investigated the improvement effects of this combined system on the physicochemical properties of saline-alkali soil and its promotion of plant growth,while exploring the response characteristics of microbial community diversity,composition,and function within this remediation system.The results showed that the combined application of Fe and salt-tolerant functional microbial communities significantly improved soil pH and salinity.Among the treatments,the combination of 5％Fe and salt-tolerant functional microbes yielded the best remediation effect,reducing soil pH by 0.18 and salinity by 37.5％.This transformed moderately saline and mildly alkaline soil into mildly saline and non-alkaline soil,while significantly increasing total soil nitrogen content by 35.3％(P＜0.05).Additionally,this system effectively alleviated salt stress damage by enhancing the production of superoxide dismutase and proline in plants,thereby significantly promoting plant growth.The improvement measures notably altered soil physicochemical properties and had a substantial impact on soil microbial community structure.After remediation,the dominant bacterial phyla in the soil included Proteobacteria(56.84％～75.48％),Bacteroidetes(19.31％～62.47％),Firmicutes(6.78％～8.85％),Actinobacteria(2.80％～3.97％),Desulfobacterota(1.47％～3.08％),and Halanaerobiaeota(0.88％～0.13％).At the genus level,the combined application of Fe and salt-tolerant functional microbial communities facilitated the domestication and enrichment of genera such as Sludge spirillum,Pseudomonas,and Marinobacter,optimizing the crop growth environment in saline-alkali land.This study not only provides an effective approach for increasing crop yields in saline-alkali soil but also offers important theoretical foundations and data support for the development of sustainable agriculture.关键词
盐碱地/改良/铁屑/耐盐功能菌群/微生物群落Key words
saline-alkali soil/remediation/iron/salt-tolerant functional microbiota/microbial community分类
环境科学引用本文复制引用
杨婷,姜永晴,周璐璐,庄林岚,张建..Fe-耐盐功能菌群联用对盐碱地的改良效果[J].环境工程学报,2025,19(5):1153-1165,13.基金项目
国家自然科学基金资助项目(52370043) （52370043）
中央高校基本科研业务费专项资金(2024QNYL30) （2024QNYL30）
