Rice planting acceleration of the activation and loss of soil iron in the red soil region of southern China

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外文摘要：·Rice planting decreased total iron but increased active iron.·Iron activation varied greatly among different paddy soils but not in woodland soils.·Paddy soil iron was mainly affected by pH,SOC and particle composition.·The decrease of soil Fe was mainly in the form of Fec and was closely related to SOC.Human activities have intensified the activity and morphological transformation of iron in soils,but there is a lack of quantitative assessment of the loss or of the transformation pattern.By studying Fe-rich rice soils in southern China and comparing them with corresponding woodland soils,it was found that rice planting reduced the total iron(Fet)content,mainly of crystalline iron(Fec),along soil profiles(0-100 cm)while increasing the content of active iron(Feo).The activation degree of Feo(Feo％)varied significantly among different parent materials in paddy soils but showed less variation in woodland soils.Regression analysis revealed significant correlations between both the content of Fec and the content of Feo in paddy soils with soil organic carbon(SOC)and particle composition(p＜0.05).The Feo％was primarily influenced by pH,SOC,and particle composition.The iron loss in paddy soil was mainly Fec and was closely related to SOC,whereas the transformation of active iron(Feo)was influenced by a combination of soil factors and environmental conditions.The results demonstrate that human activities accelerate the loss and activation of active iron in the soil,thereby altering the iron cycling process in rice paddy ecosystems.

外文关键词：

paddy soiliron formsparent materialrice plantingFe activation

作者：

San'an Nie、Jie Fan、Ningxiang Ouyang、Hao Sheng、Yangzhu Zhang、Xiong Yan、Zhan Yu

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作者单位：

College of Resources,Hunan Agricultural University,Changsha 410125,China

School of Economic Geography,Hunan University of Finance and Economics,Changsha 410205,China

Zunyi Normal University,Zunyi 563006,China

基金：

Scientific Research Fund of Hunan Provincial Education DepartmentSan'an Nie thanks the National Natural Science Foundation of ChinaNational Natural Science Foundation of Hunan Province,China

项目编号：

20A234421772882023JJ30307

出版年：

2024

DOI：

10.1007/s42832-023-0198-y

土壤生态学快报(英文)

ISSN：

年,卷(期)：2024.6(2)