Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils

Soil moisture status has an important effect on the process of denitrification in paddy soils. However, it is unclear how it affects the ferrous iron-involved denitrification. Here, the influence of drying-rewetting cycles on ferrous iron-involved denitrification in paddy soil were studied with batc...

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Autores principales:	Yushuai Zhang, Baokun Xu, Jiangpei Han, Liangsheng Shi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	denitrification autotrophic denitrification iron drying and rewetting cycle rewetting frequency Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/2ed3d84a66b7485282f7e2c43343ff21
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id	oai:doaj.org-article:2ed3d84a66b7485282f7e2c43343ff21
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spelling	oai:doaj.org-article:2ed3d84a66b7485282f7e2c43343ff212021-11-25T19:15:32ZEffects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils10.3390/w132232122073-4441https://doaj.org/article/2ed3d84a66b7485282f7e2c43343ff212021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3212https://doaj.org/toc/2073-4441Soil moisture status has an important effect on the process of denitrification in paddy soils. However, it is unclear how it affects the ferrous iron-involved denitrification. Here, the influence of drying-rewetting cycles on ferrous iron-involved denitrification in paddy soil were studied with batch experiments. The dynamics of nitrate, ammonia, Fe<sup>2+</sup>, Fe<sup>3+</sup> and total organic carbon (TOC), as well as nitrous oxide (N<sub>2</sub>O) were investigated using the iron-rich paddy soil in Jiangxi province, South China. Results demonstrated that the denitrification rate dropped while ammonia nitrogen content (NH<sub>4</sub><sup>+</sup>-N) showed a rapid accumulation in the drying period. In the rewetting period, organic carbon played two-side roles. Organic carbon and ferrous iron together provided electron donors to denitrification, and organic carbon simultaneously reduced ferric iron under anaerobic environment. There were complex interactions among organic carbon, nitrate and Fe<sup>2+</sup>/Fe<sup>3+</sup> under drying-rewetting cycles. Soil rewetting led to denitrification flush, especially after a moderately long drying period, while excessively frequent drying-rewetting alternation was not favorable to nitrate denitrification.Yushuai ZhangBaokun XuJiangpei HanLiangsheng ShiMDPI AGarticledenitrificationautotrophic denitrificationirondrying and rewetting cyclerewetting frequencyHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3212, p 3212 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	denitrification autotrophic denitrification iron drying and rewetting cycle rewetting frequency Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	denitrification autotrophic denitrification iron drying and rewetting cycle rewetting frequency Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Yushuai Zhang Baokun Xu Jiangpei Han Liangsheng Shi Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils
description	Soil moisture status has an important effect on the process of denitrification in paddy soils. However, it is unclear how it affects the ferrous iron-involved denitrification. Here, the influence of drying-rewetting cycles on ferrous iron-involved denitrification in paddy soil were studied with batch experiments. The dynamics of nitrate, ammonia, Fe<sup>2+</sup>, Fe<sup>3+</sup> and total organic carbon (TOC), as well as nitrous oxide (N<sub>2</sub>O) were investigated using the iron-rich paddy soil in Jiangxi province, South China. Results demonstrated that the denitrification rate dropped while ammonia nitrogen content (NH<sub>4</sub><sup>+</sup>-N) showed a rapid accumulation in the drying period. In the rewetting period, organic carbon played two-side roles. Organic carbon and ferrous iron together provided electron donors to denitrification, and organic carbon simultaneously reduced ferric iron under anaerobic environment. There were complex interactions among organic carbon, nitrate and Fe<sup>2+</sup>/Fe<sup>3+</sup> under drying-rewetting cycles. Soil rewetting led to denitrification flush, especially after a moderately long drying period, while excessively frequent drying-rewetting alternation was not favorable to nitrate denitrification.
format	article
author	Yushuai Zhang Baokun Xu Jiangpei Han Liangsheng Shi
author_facet	Yushuai Zhang Baokun Xu Jiangpei Han Liangsheng Shi
author_sort	Yushuai Zhang
title	Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils
title_short	Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils
title_full	Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils
title_fullStr	Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils
title_full_unstemmed	Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils
title_sort	effects of drying-rewetting cycles on ferrous iron-involved denitrification in paddy soils
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2ed3d84a66b7485282f7e2c43343ff21
work_keys_str_mv	AT yushuaizhang effectsofdryingrewettingcyclesonferrousironinvolveddenitrificationinpaddysoils AT baokunxu effectsofdryingrewettingcyclesonferrousironinvolveddenitrificationinpaddysoils AT jiangpeihan effectsofdryingrewettingcyclesonferrousironinvolveddenitrificationinpaddysoils AT liangshengshi effectsofdryingrewettingcyclesonferrousironinvolveddenitrificationinpaddysoils
_version_	1718410082281062400

Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils

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