期刊论文

中文

衡阳师范学院学报

1673-0313

2024

45

03

83-89

10.3969/j.issn.1673-0313.2024.03.014

国家自然科学基金项目（42077297）； 湖南省研究生科研创新项目（CX20221270）资助；

本校为第一机构

根际区甲基汞（MeHg）含量高低直接影响水稻吸收积累甲基汞量，在外源铁作用下的水稻根系分泌物如何影响根际汞的甲基化值得深入探讨。通过溶液培养实验，向溶液中添加铁诱导水稻根表产生铁氧化物，然后收集水稻根系分泌物，将其添加至人为汞污染土壤中培养，研究外源铁作用下的水稻根系分泌物对汞甲基化的影响。结果表明：水稻根系分泌物（FMW）和铁诱导后水稻根系分泌物(FMWFe)处理土壤中MeHg平均含量分别比对照（DDW）高35.73%和12.04%。FMWFe处理下溶解态和可交换态（F1）、特殊吸附态（F2）以及有机结合态汞比例低于FMW处理，FMWFe处理下土壤有机质（SOM）和微生物多样性均低于FMW处理，Pe...

The content of methylmercury(MeHg)in rhizosphere directly affects the amount of methylmercury absorbed and accumulated by rice,and it is deserved further discussion that the root exudates of rice affect the methylation of mercury in rhizosphere by the exogenous iron.By the solution culture experiment,iron oxide on the rice root surface was formed by the addition of iron in the solution,and the rice root exudates were collected and added to the mercury-contaminated soil.The MeHg content,microorganisms,mercury speciation,pH value and organic matter were determined to study the effect of rice roo...