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Rhizodeposition of Nitrogen and Carbon by Mungbean (Vigna radiata L.) and Its Contribution to Intercropped Oats (Avena nuda L.)

Compounds released by mungbean roots potentially represent an enormous source of nitrogen (N) and carbon (C) in mungbean-oat intercropping systems. In this study, an in situ experiment was conducted using a (15)N - (13)C double stem-feeding method to measure N and C derived from the rhizodeposition...

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Autores principales: Zang, Huadong, Yang, Xuechao, Feng, Xiaomin, Qian, Xin, Hu, Yuegao, Ren, Changzhong, Zeng, Zhaohai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4379154/
https://www.ncbi.nlm.nih.gov/pubmed/25821975
http://dx.doi.org/10.1371/journal.pone.0121132
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author Zang, Huadong
Yang, Xuechao
Feng, Xiaomin
Qian, Xin
Hu, Yuegao
Ren, Changzhong
Zeng, Zhaohai
author_facet Zang, Huadong
Yang, Xuechao
Feng, Xiaomin
Qian, Xin
Hu, Yuegao
Ren, Changzhong
Zeng, Zhaohai
author_sort Zang, Huadong
collection PubMed
description Compounds released by mungbean roots potentially represent an enormous source of nitrogen (N) and carbon (C) in mungbean-oat intercropping systems. In this study, an in situ experiment was conducted using a (15)N - (13)C double stem-feeding method to measure N and C derived from the rhizodeposition (NdfR and CdfR) of mungbean and their transfer to oats in an intercropping system. Mungbean plants were sole cropped (S) or intercropped (I) with oat. The plants were labeled 5 weeks after planting and were harvested at the beginning of pod setting (I(p) and S(p)) and at maturity (I(m) and S(m)). More than 60% and 50% of the applied (15)N and (13)C, respectively, were recovered in each treatment, with (15)N and (13)C being quite uniformly distributed in the different plant parts. NdfR represented 9.8% (S(p)), 9.2% (I(p)), 20.1% (S(m)), and 21.2% (I(m)) of total mungbean plant N, whereas CdfR represented 13.3% (S(p)), 42.0% (I(p)), 15.4% (S(m)), and 22.6% (I(m)) of total mungbean plant C. When considering the part of rhizodeposition transferred to associated oat, intercropping mungbean released more NdfR and CdfR than mungbean alone. About 53.4–83.2% of below-ground plant N (BGP-N) and 58.4–85.9% of BGP-C originated from NdfR and CdfR, respectively. The N in oats derived from mungbean increased from 7.6% at the pod setting stage to 9.7% at maturity, whereas the C in oats increased from 16.2% to 22.0%, respectively. Only a small percentage of rhizodeposition from mungbean was transferred to oats in the intercropping systems, with a large percentage remaining in the soil. This result indicates that mungbean rhizodeposition might contribute to higher N and C availability in the soil for subsequent crops.
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spelling pubmed-43791542015-04-09 Rhizodeposition of Nitrogen and Carbon by Mungbean (Vigna radiata L.) and Its Contribution to Intercropped Oats (Avena nuda L.) Zang, Huadong Yang, Xuechao Feng, Xiaomin Qian, Xin Hu, Yuegao Ren, Changzhong Zeng, Zhaohai PLoS One Research Article Compounds released by mungbean roots potentially represent an enormous source of nitrogen (N) and carbon (C) in mungbean-oat intercropping systems. In this study, an in situ experiment was conducted using a (15)N - (13)C double stem-feeding method to measure N and C derived from the rhizodeposition (NdfR and CdfR) of mungbean and their transfer to oats in an intercropping system. Mungbean plants were sole cropped (S) or intercropped (I) with oat. The plants were labeled 5 weeks after planting and were harvested at the beginning of pod setting (I(p) and S(p)) and at maturity (I(m) and S(m)). More than 60% and 50% of the applied (15)N and (13)C, respectively, were recovered in each treatment, with (15)N and (13)C being quite uniformly distributed in the different plant parts. NdfR represented 9.8% (S(p)), 9.2% (I(p)), 20.1% (S(m)), and 21.2% (I(m)) of total mungbean plant N, whereas CdfR represented 13.3% (S(p)), 42.0% (I(p)), 15.4% (S(m)), and 22.6% (I(m)) of total mungbean plant C. When considering the part of rhizodeposition transferred to associated oat, intercropping mungbean released more NdfR and CdfR than mungbean alone. About 53.4–83.2% of below-ground plant N (BGP-N) and 58.4–85.9% of BGP-C originated from NdfR and CdfR, respectively. The N in oats derived from mungbean increased from 7.6% at the pod setting stage to 9.7% at maturity, whereas the C in oats increased from 16.2% to 22.0%, respectively. Only a small percentage of rhizodeposition from mungbean was transferred to oats in the intercropping systems, with a large percentage remaining in the soil. This result indicates that mungbean rhizodeposition might contribute to higher N and C availability in the soil for subsequent crops. Public Library of Science 2015-03-30 /pmc/articles/PMC4379154/ /pubmed/25821975 http://dx.doi.org/10.1371/journal.pone.0121132 Text en © 2015 Zang 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, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Zang, Huadong
Yang, Xuechao
Feng, Xiaomin
Qian, Xin
Hu, Yuegao
Ren, Changzhong
Zeng, Zhaohai
Rhizodeposition of Nitrogen and Carbon by Mungbean (Vigna radiata L.) and Its Contribution to Intercropped Oats (Avena nuda L.)
title Rhizodeposition of Nitrogen and Carbon by Mungbean (Vigna radiata L.) and Its Contribution to Intercropped Oats (Avena nuda L.)
title_full Rhizodeposition of Nitrogen and Carbon by Mungbean (Vigna radiata L.) and Its Contribution to Intercropped Oats (Avena nuda L.)
title_fullStr Rhizodeposition of Nitrogen and Carbon by Mungbean (Vigna radiata L.) and Its Contribution to Intercropped Oats (Avena nuda L.)
title_full_unstemmed Rhizodeposition of Nitrogen and Carbon by Mungbean (Vigna radiata L.) and Its Contribution to Intercropped Oats (Avena nuda L.)
title_short Rhizodeposition of Nitrogen and Carbon by Mungbean (Vigna radiata L.) and Its Contribution to Intercropped Oats (Avena nuda L.)
title_sort rhizodeposition of nitrogen and carbon by mungbean (vigna radiata l.) and its contribution to intercropped oats (avena nuda l.)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4379154/
https://www.ncbi.nlm.nih.gov/pubmed/25821975
http://dx.doi.org/10.1371/journal.pone.0121132
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