Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil

Background and aims: Alternate wetting and drying (AWD) saves water in paddy rice production but could influence soil physical conditions and root growth. This study investigated the interaction between contrasting rice genotypes, soil structure and mechanical impedance influenced by hydraulic stre...

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Main Authors:	Fang, Huan, Zhou, Hu, Norton, Gareth J., Price, Adam H., Raffan, Annette C., Mooney, Sacha J., Peng, Xinhua, Hallett, Paul D.
Format:	Article
Language:	English
Published:	Springer 2018
Online Access:	http://eprints.nottingham.ac.uk/52714/ http://eprints.nottingham.ac.uk/52714/ http://eprints.nottingham.ac.uk/52714/ http://eprints.nottingham.ac.uk/52714/1/Manuscript-Huan%20revised%20after%20review%20-%20CLEAN.pdf

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recordtype	eprints
spelling	nottingham-527142018-07-02T14:30:10Z http://eprints.nottingham.ac.uk/52714/ Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil Fang, Huan Zhou, Hu Norton, Gareth J. Price, Adam H. Raffan, Annette C. Mooney, Sacha J. Peng, Xinhua Hallett, Paul D. Background and aims: Alternate wetting and drying (AWD) saves water in paddy rice production but could influence soil physical conditions and root growth. This study investigated the interaction between contrasting rice genotypes, soil structure and mechanical impedance influenced by hydraulic stresses typical of AWD. Methods: Contrasting rice genotypes, IR64 and deeper- rooting Black Gora were grown in various soil conditions for 2 weeks. For the AWD treatments the soil was either maintained in a puddled state, equilibrated to −5 kPa (WET), or dried to −50 kPa and then rewetted at thewater potential of −5 kPa (DRY-WET). There was an additional manipulated macropore structure treatment, i.e. the soil was broken into aggregates, packed into cores and equilibrated to −5 kPa (REPACKED). A flooded treatment (puddled soil remained flooded until harvest) was set as a control (FLOODED). Soil bulk density, penetration resistance and X-ray Computed Tomography (CT) derived macropore structure were measured. Total root length, root surface area, root volume, average diameter, and tip number were determined by WinRhizo. Results: AWD induced formation of macropores and slightly increased soil mechanical impedance. The total root length of the AWD and REPACKED treatments were 1.7–2.2 and 3.5–4.2 times greater than that of the FLOODED treatment. There was no significant difference between WET and DRY-WET treatments. The differences between genotypes were minimal. Conclusions: AWD influenced soil physical properties and some root characteristics of rice seedlings, but drying soil initially to −50 kPa versus −5 kPa had no impact. Macropores formed intentionally from repacking caused a large change in root characteristics. Springer 2018-06-29 Article PeerReviewed application/pdf en http://eprints.nottingham.ac.uk/52714/1/Manuscript-Huan%20revised%20after%20review%20-%20CLEAN.pdf Fang, Huan and Zhou, Hu and Norton, Gareth J. and Price, Adam H. and Raffan, Annette C. and Mooney, Sacha J. and Peng, Xinhua and Hallett, Paul D. (2018) Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil. Plant and Soil . ISSN 1573-5036 https://link.springer.com/article/10.1007%2Fs11104-018-3715-5 doi:10.1007/s11104-018-3715-5 doi:10.1007/s11104-018-3715-5
repository_type	Digital Repository
institution_category	Local University
institution	University of Nottingham Malaysia Campus
building	Nottingham Research Data Repository
collection	Online Access
language	English
description	Background and aims: Alternate wetting and drying (AWD) saves water in paddy rice production but could influence soil physical conditions and root growth. This study investigated the interaction between contrasting rice genotypes, soil structure and mechanical impedance influenced by hydraulic stresses typical of AWD. Methods: Contrasting rice genotypes, IR64 and deeper- rooting Black Gora were grown in various soil conditions for 2 weeks. For the AWD treatments the soil was either maintained in a puddled state, equilibrated to −5 kPa (WET), or dried to −50 kPa and then rewetted at thewater potential of −5 kPa (DRY-WET). There was an additional manipulated macropore structure treatment, i.e. the soil was broken into aggregates, packed into cores and equilibrated to −5 kPa (REPACKED). A flooded treatment (puddled soil remained flooded until harvest) was set as a control (FLOODED). Soil bulk density, penetration resistance and X-ray Computed Tomography (CT) derived macropore structure were measured. Total root length, root surface area, root volume, average diameter, and tip number were determined by WinRhizo. Results: AWD induced formation of macropores and slightly increased soil mechanical impedance. The total root length of the AWD and REPACKED treatments were 1.7–2.2 and 3.5–4.2 times greater than that of the FLOODED treatment. There was no significant difference between WET and DRY-WET treatments. The differences between genotypes were minimal. Conclusions: AWD influenced soil physical properties and some root characteristics of rice seedlings, but drying soil initially to −50 kPa versus −5 kPa had no impact. Macropores formed intentionally from repacking caused a large change in root characteristics.
format	Article
author	Fang, Huan Zhou, Hu Norton, Gareth J. Price, Adam H. Raffan, Annette C. Mooney, Sacha J. Peng, Xinhua Hallett, Paul D.
spellingShingle	Fang, Huan Zhou, Hu Norton, Gareth J. Price, Adam H. Raffan, Annette C. Mooney, Sacha J. Peng, Xinhua Hallett, Paul D. Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil
author_facet	Fang, Huan Zhou, Hu Norton, Gareth J. Price, Adam H. Raffan, Annette C. Mooney, Sacha J. Peng, Xinhua Hallett, Paul D.
author_sort	Fang, Huan
title	Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil
title_short	Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil
title_full	Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil
title_fullStr	Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil
title_full_unstemmed	Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil
title_sort	interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil
publisher	Springer
publishDate	2018
url	http://eprints.nottingham.ac.uk/52714/ http://eprints.nottingham.ac.uk/52714/ http://eprints.nottingham.ac.uk/52714/ http://eprints.nottingham.ac.uk/52714/1/Manuscript-Huan%20revised%20after%20review%20-%20CLEAN.pdf
first_indexed	2018-09-06T14:28:59Z
last_indexed	2018-09-06T14:28:59Z
_version_	1610868735317377024

Interaction between contrasting rice genotypes and soil physical conditions induced by hydraulic stresses typical of alternate wetting and drying irrigation of soil

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