Effects of human activities on pedogenesis and iron dynamics in paddy soils developed on Quaternary red clays

doi:10.1016/j.catena.2018.03.019

	Effects of human activities on pedogenesis and iron dynamics in paddy soils developed on Quaternary red clays
	Huang, Lai-Ming 1,2,3,4,5; Shao, Min-An 1,3,4,5; Huang, Fang 6; Zhang, Gan-Lin 2,3
刊名	CATENA
	2018-07-01
卷号	166 页码:78-88
关键词	Anthropedogenesis Soil chronosequence Fe oxides delta Fe-56 Temporal changes
ISSN号	0341-8162
DOI	10.1016/j.catena.2018.03.019
通讯作者	Shao, Min-An(shaoma@igsnrr.ac.cn) ; Zhang, Gan-Lin(glzhang@issas.ac.cn)
英文摘要	A paddy soil chronosequence consisting of four profiles derived from Quaternary red clay (QRC) in Southern China with cultivation history from 0 to 300 years was studied to understand the underlying mechanisms and processes controlling the centennial scale Fe evolution during anthropedogenesis. We evaluated the chronosequencial changes in depth distribution of Fe oxides and Fe isotopic compositions. Results showed that paddy soil development on QRC over a centennial time scale caused increasing profile differentiation of Fe oxides and measurable Fe isotope fractionation. Total Fe and oxide bound Fe as well as the maximum Fe illuviation depth decreased as paddy soils age, leading to significant differences in morphological properties between paddy and non-paddy soils with the same parent material. Selective extractions showed that the weakly-bound, oxide bound and silicate bound Fe corresponded to 4-18%, 49-81%, and 11-40% of the total Fe, respectively, and these proportions varied with both time and depth due to the redox-related Fe transformation and redistribution. delta Fe-56 values in the studied paddy soil chronosequence ranged from 0.05 parts per thousand to 0.26 parts per thousand and exhibited a strong negative correlation with the logarithm of total Fe concentrations, suggesting mass-dependent Fe isotope fractionation occurred as a result of the preferential removal of lighter Fe isotopes during Fe leaching loss under the predominant reducing conditions. However, the Fe isotopic ratio of a specific paddy soil horizon was a result of a complex interaction of different processes, which were summarized and interpreted in our proposed conceptual model of Fe evolution in terraced paddy soils. Further investigations of Fe isotope signatures in the soil-plant water system with a combination of laboratory simulation and prediction of Fe isotope fractionation under different pedogenic processes are needed to evaluate the relative contribution of multiple processes to Fe isotope fractionation during anthropedogenesis of paddy soils.
资助项目	Natural Science Foundation of China[41601221] ; Natural Science Foundation of China[41571130051] ; Ministry of Science and Technology of China[2016YFC0501605] ; Outstanding Young Talent Project from Institute of Geographic Sciences and Natural Resources Research[2017RC203] ; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences[Y20160003] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences[A314021402-1602] ; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences[LENOM2016Q0001]
WOS关键词	FE ISOTOPE FRACTIONATION ; DIFFERENT PARENT MATERIALS ; MASS-SPECTROMETRY ; SOUTH CHINA ; ICP-MS ; CHRONOSEQUENCE ; EVOLUTION ; PHOSPHORUS ; TRANSFORMATION ; REDUCTION
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000434238800008
资助机构	Natural Science Foundation of China ; Ministry of Science and Technology of China ; Outstanding Young Talent Project from Institute of Geographic Sciences and Natural Resources Research ; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences ; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/54966]
专题	中国科学院地理科学与资源研究所
通讯作者	Shao, Min-An; Zhang, Gan-Lin
作者单位	1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71 East Beijing Rd, Nanjing 210008, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environmen4, Beijing 100049, Peoples R China 4.Northwest A&F Univ, Coll Nat Resources & Environm, State Key Lab Soil Eros & Dryland Farming Loess P, CAS, Yangling, Shaanxi, Peoples R China 5.Northwest A&F Univ, Coll Nat Resources & Environm, MWR, Yangling, Shaanxi, Peoples R China 6.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Huang, Lai-Ming,Shao, Min-An,Huang, Fang,et al. Effects of human activities on pedogenesis and iron dynamics in paddy soils developed on Quaternary red clays[J]. CATENA,2018,166:78-88.
APA	Huang, Lai-Ming,Shao, Min-An,Huang, Fang,&Zhang, Gan-Lin.(2018).Effects of human activities on pedogenesis and iron dynamics in paddy soils developed on Quaternary red clays.CATENA,166,78-88.
MLA	Huang, Lai-Ming,et al."Effects of human activities on pedogenesis and iron dynamics in paddy soils developed on Quaternary red clays".CATENA 166(2018):78-88.