Legume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations

Cropping systems with legumes play key roles in farming systems in sub-Saharan Africa. However, how commonly legume associations perform in low input-systems is not well-known. Here, we studied four legume species used in three systems in rotation with upland rice, i.e., groundnut monocropping, sorg...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Harimenja Razafintsalama, Marie Sauvadet, Jean Trap, Patrice Autfray, Aude Ripoche, Thierry Becquer
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ecological intensification plant diversification intercropping arbuscular mycorrhizal fungi rhizobia P deficiency Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/381a1721510c46a19dc0cdd58346ab39
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:381a1721510c46a19dc0cdd58346ab39
record_format	dspace
spelling	oai:doaj.org-article:381a1721510c46a19dc0cdd58346ab392021-11-25T19:00:21ZLegume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations10.3390/su1322123492071-1050https://doaj.org/article/381a1721510c46a19dc0cdd58346ab392021-11-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/22/12349https://doaj.org/toc/2071-1050Cropping systems with legumes play key roles in farming systems in sub-Saharan Africa. However, how commonly legume associations perform in low input-systems is not well-known. Here, we studied four legume species used in three systems in rotation with upland rice, i.e., groundnut monocropping, sorghum–cowpea intercropping, and velvet bean–crotalaria intercropping, in two fertilization managements on the previous rice, i.e., manure alone or complemented with mineral fertilization. Legume suitability was assessed using rhizobial and mycorrhizal colonization rates, plant biomass production, shoot N and P content, and biological N<sub>2</sub> fixation based on their δ<sup>15</sup>N natural abundance. Shoot and root biomasses varied significantly between legume species and were positively correlated with nodule number (r = 0.49 and 0.74, <i>p</i>-value < 0.05 and <0.001, respectively) and the amount of fixed N (r = 0.73 and 0.50, <i>p</i>-value < 0.001 and <0.05, respectively). The proportion of plant N derived from N<sub>2</sub> fixation also varied significantly between species, with a higher percentage for velvet bean (66%), compared to the other three species (50 to 60%). Legume roots were weakly colonized by AM fungi, with similar levels between species. Overall, fertilization management did not significantly impact legume biomass, symbioses, or N<sub>2</sub> fixation, yet the organo-mineral fertilization significantly increased legume shoot P content. The lack of effect of mineral fertilization on N<sub>2</sub> fixation and biomass could be due to other nutrient deficiencies (Ca, Mg, micronutrients), which can hamper symbioses with rhizobia and mycorrhizae.Harimenja RazafintsalamaMarie SauvadetJean TrapPatrice AutfrayAude RipocheThierry BecquerMDPI AGarticleecological intensificationplant diversificationintercroppingarbuscular mycorrhizal fungirhizobiaP deficiencyEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 12349, p 12349 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ecological intensification plant diversification intercropping arbuscular mycorrhizal fungi rhizobia P deficiency Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	ecological intensification plant diversification intercropping arbuscular mycorrhizal fungi rhizobia P deficiency Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Harimenja Razafintsalama Marie Sauvadet Jean Trap Patrice Autfray Aude Ripoche Thierry Becquer Legume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations
description	Cropping systems with legumes play key roles in farming systems in sub-Saharan Africa. However, how commonly legume associations perform in low input-systems is not well-known. Here, we studied four legume species used in three systems in rotation with upland rice, i.e., groundnut monocropping, sorghum–cowpea intercropping, and velvet bean–crotalaria intercropping, in two fertilization managements on the previous rice, i.e., manure alone or complemented with mineral fertilization. Legume suitability was assessed using rhizobial and mycorrhizal colonization rates, plant biomass production, shoot N and P content, and biological N<sub>2</sub> fixation based on their δ<sup>15</sup>N natural abundance. Shoot and root biomasses varied significantly between legume species and were positively correlated with nodule number (r = 0.49 and 0.74, <i>p</i>-value < 0.05 and <0.001, respectively) and the amount of fixed N (r = 0.73 and 0.50, <i>p</i>-value < 0.001 and <0.05, respectively). The proportion of plant N derived from N<sub>2</sub> fixation also varied significantly between species, with a higher percentage for velvet bean (66%), compared to the other three species (50 to 60%). Legume roots were weakly colonized by AM fungi, with similar levels between species. Overall, fertilization management did not significantly impact legume biomass, symbioses, or N<sub>2</sub> fixation, yet the organo-mineral fertilization significantly increased legume shoot P content. The lack of effect of mineral fertilization on N<sub>2</sub> fixation and biomass could be due to other nutrient deficiencies (Ca, Mg, micronutrients), which can hamper symbioses with rhizobia and mycorrhizae.
format	article
author	Harimenja Razafintsalama Marie Sauvadet Jean Trap Patrice Autfray Aude Ripoche Thierry Becquer
author_facet	Harimenja Razafintsalama Marie Sauvadet Jean Trap Patrice Autfray Aude Ripoche Thierry Becquer
author_sort	Harimenja Razafintsalama
title	Legume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations
title_short	Legume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations
title_full	Legume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations
title_fullStr	Legume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations
title_full_unstemmed	Legume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations
title_sort	legume nitrogen fixation and symbioses in low-inputs rainfed rice rotations
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/381a1721510c46a19dc0cdd58346ab39
work_keys_str_mv	AT harimenjarazafintsalama legumenitrogenfixationandsymbiosesinlowinputsrainfedricerotations AT mariesauvadet legumenitrogenfixationandsymbiosesinlowinputsrainfedricerotations AT jeantrap legumenitrogenfixationandsymbiosesinlowinputsrainfedricerotations AT patriceautfray legumenitrogenfixationandsymbiosesinlowinputsrainfedricerotations AT auderipoche legumenitrogenfixationandsymbiosesinlowinputsrainfedricerotations AT thierrybecquer legumenitrogenfixationandsymbiosesinlowinputsrainfedricerotations
_version_	1718410394846887936

Legume Nitrogen Fixation and Symbioses in Low-Inputs Rainfed Rice Rotations

Ejemplares similares