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Characterizing roots and water uptake in a ground cover rice production system

BACKGROUND AND AIMS: Water-saving ground cover rice production systems (GCRPS) are gaining popularity in many parts of the world. We aimed to describe the characteristics of root growth, morphology, distribution, and water uptake for a GCRPS. METHODS: A traditional paddy rice production system (TPRP...

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Autores principales: Li, Sen, Zuo, Qiang, Wang, Xiaoyu, Ma, Wenwen, Jin, Xinxin, Shi, Jianchu, Ben-Gal, Alon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5501594/
https://www.ncbi.nlm.nih.gov/pubmed/28686687
http://dx.doi.org/10.1371/journal.pone.0180713
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author Li, Sen
Zuo, Qiang
Wang, Xiaoyu
Ma, Wenwen
Jin, Xinxin
Shi, Jianchu
Ben-Gal, Alon
author_facet Li, Sen
Zuo, Qiang
Wang, Xiaoyu
Ma, Wenwen
Jin, Xinxin
Shi, Jianchu
Ben-Gal, Alon
author_sort Li, Sen
collection PubMed
description BACKGROUND AND AIMS: Water-saving ground cover rice production systems (GCRPS) are gaining popularity in many parts of the world. We aimed to describe the characteristics of root growth, morphology, distribution, and water uptake for a GCRPS. METHODS: A traditional paddy rice production system (TPRPS) was compared with GCRPS in greenhouse and field experiments. In the greenhouse, GCRPS where root zone average soil water content was kept near saturation (GCRPS(sat)), field capacity (GCRPS(fwc)) and 80% field capacity (GCRPS(80%)), were evaluated. In a two-year field experiment, GCRPS(sat) and GCRPS(80%) were applied. RESULTS: Similar results were found in greenhouse and field experiments. Before mid-tillering the upper soil temperature was higher for GCRPS, leading to enhanced root dry weight, length, surface area, specific root length, and smaller diameter of roots but lower water uptake rate per root length compared to TPRPS. In subsequent growth stages, the reduced soil water content under GCRPS caused that the preponderance of root growth under GCRPS(sat) disappeared in comparison to TPRPS. Under other GCRPS treatments (GCRPS(fwc) and GCRPS(80%)), significant limitation on root growth, bigger root diameter and higher water uptake rate per root length were found. CONCLUSIONS: Discrepancies in soil water and temperature between TPRPS and GCRPS caused adjustments to root growth, morphology, distribution and function. Even though drought stress was inevitable after mid-tillering under GCRPS, especially GCRPS(80%), similar or even enhanced root water uptake capacity in comparison to TPRPS might promote allocation of photosynthetic products to shoots and increase water productivity.
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spelling pubmed-55015942017-07-25 Characterizing roots and water uptake in a ground cover rice production system Li, Sen Zuo, Qiang Wang, Xiaoyu Ma, Wenwen Jin, Xinxin Shi, Jianchu Ben-Gal, Alon PLoS One Research Article BACKGROUND AND AIMS: Water-saving ground cover rice production systems (GCRPS) are gaining popularity in many parts of the world. We aimed to describe the characteristics of root growth, morphology, distribution, and water uptake for a GCRPS. METHODS: A traditional paddy rice production system (TPRPS) was compared with GCRPS in greenhouse and field experiments. In the greenhouse, GCRPS where root zone average soil water content was kept near saturation (GCRPS(sat)), field capacity (GCRPS(fwc)) and 80% field capacity (GCRPS(80%)), were evaluated. In a two-year field experiment, GCRPS(sat) and GCRPS(80%) were applied. RESULTS: Similar results were found in greenhouse and field experiments. Before mid-tillering the upper soil temperature was higher for GCRPS, leading to enhanced root dry weight, length, surface area, specific root length, and smaller diameter of roots but lower water uptake rate per root length compared to TPRPS. In subsequent growth stages, the reduced soil water content under GCRPS caused that the preponderance of root growth under GCRPS(sat) disappeared in comparison to TPRPS. Under other GCRPS treatments (GCRPS(fwc) and GCRPS(80%)), significant limitation on root growth, bigger root diameter and higher water uptake rate per root length were found. CONCLUSIONS: Discrepancies in soil water and temperature between TPRPS and GCRPS caused adjustments to root growth, morphology, distribution and function. Even though drought stress was inevitable after mid-tillering under GCRPS, especially GCRPS(80%), similar or even enhanced root water uptake capacity in comparison to TPRPS might promote allocation of photosynthetic products to shoots and increase water productivity. Public Library of Science 2017-07-07 /pmc/articles/PMC5501594/ /pubmed/28686687 http://dx.doi.org/10.1371/journal.pone.0180713 Text en © 2017 Li et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Li, Sen
Zuo, Qiang
Wang, Xiaoyu
Ma, Wenwen
Jin, Xinxin
Shi, Jianchu
Ben-Gal, Alon
Characterizing roots and water uptake in a ground cover rice production system
title Characterizing roots and water uptake in a ground cover rice production system
title_full Characterizing roots and water uptake in a ground cover rice production system
title_fullStr Characterizing roots and water uptake in a ground cover rice production system
title_full_unstemmed Characterizing roots and water uptake in a ground cover rice production system
title_short Characterizing roots and water uptake in a ground cover rice production system
title_sort characterizing roots and water uptake in a ground cover rice production system
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5501594/
https://www.ncbi.nlm.nih.gov/pubmed/28686687
http://dx.doi.org/10.1371/journal.pone.0180713
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