土壤中铁锰结核微结构与组分研究进展  

Research Progress on the Microstructure and Constituents of Fe-Mn Nodules in Soil

作　　者：王祎 黄来明[1,2] WANG Yi;HUANG Laiming(Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,北京100101 [2]中国科学院大学资源与环境学院,北京100049

出　　处：《土壤学报》2023年第2期317-331,共15页Acta Pedologica Sinica

基　　金：国家自然科学基金项目(41977004);中国科学院青年创新促进会会员项目(2019052);中国科学院地理科学与资源研究所秉维优秀青年人才项目(2017RC203)资助。

摘　　要：铁锰结核是土壤演化过程中形成的一种特殊新生体,其内部同心圆环带构造可用于反演古气候条件和成土环境,其组分可为微生物代谢提供营养元素和能量,进而影响土壤中养分和重金属的转化、固定与释放。本文综述了近几十年来国内外学者对土壤中铁锰结核研究所取得的进展,包括铁锰结核形成机制、演变过程与影响因素,不同地区铁锰结核微结构与组分差异,以及铁锰结核对养分转化与重金属吸附的影响。未来需进一步研究不同成土阶段铁锰结核形成速率与环境阈值,构建不同成土环境中铁锰结核演化模型,阐明铁锰结核对土壤中养分和重金属的固释机理,以期更好地理解地表关键带土壤发生过程与元素生物地球化学循环,为定量评价变化环境下土壤质量和功能提供依据。Ferromanganese concretions(or Fe-Mn nodules),as a specific type of soil neoformations,are formed during pedogenic processes.The structure of concentric rings in soil Fe-Mn nodules can be used to reconstruct paleoclimatic conditions and soil-forming environments.The constituents of soil Fe-Mn nodules can provide nutrients and energy for microbial metabolism that in turn affect the transformation,fixation and mobilization of soil nutrients and heavy metals.This article reviewed the research progresses on soil Fe-Mn nodules during the past several decades,including(i)the formation mechanism and process of Fe-Mn nodules and the associated influencing factors;(ii)differences in the microstructure and constituents of Fe-Mn nodules in different regions;and(iii)effects of Fe-Mn nodules on nutrient transformation and heavy metal sorption.Future research priorities include(a)study of the formation rates and environmental thresholds of Fe-Mn nodules during different stages of soil development;(b)establishment of the evolution models of Fe-Mn nodules in different soil-forming environments;and(c)elucidation of the mechanisms of stabilization and release of soil nutrients and heavy metals by Fe-Mn nodules.This will facilitate understanding of the pedogenic processes and elemental biogeochemical cycling in the Earth’s Critical Zone and provide a basis for quantitative evaluation of soil quality and function under changing environments.

关 键 词：土壤发生 新生体 铁锰结核 氧化还原反应 元素地球化学 

分 类 号：S151[农业科学—土壤学]