@article{fdi:010083795,
  title = {{L}egume nitrogen fixation and symbioses in low-inputs rainfed rice rotations},
  author = {{R}azafintsalama, {H}. and {S}auvadet, {M}arie and {T}rap, {J}ean and {A}utfray, {P}. and {R}ipoche, {A}. and {B}ecquer, {T}hierry},
  editor = {},
  language = {{ENG}},
  abstract = {{C}ropping systems with legumes play key roles in farming systems in sub-{S}aharan {A}frica. {H}owever, how commonly legume associations perform in low input-systems is not well-known. {H}ere, 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. {L}egume suitability was assessed using rhizobial and mycorrhizal colonization rates, plant biomass production, shoot {N} and {P} content, and biological {N}-2 fixation based on their delta {N}-15 natural abundance. {S}hoot and root biomasses varied significantly between legume species and were positively correlated with nodule number (r = 0.49 and 0.74, p-value < 0.05 and < 0.001, respectively) and the amount of fixed {N} (r = 0.73 and 0.50, p-value < 0.001 and < 0.05, respectively). {T}he proportion of plant {N} derived from {N}-2 fixation also varied significantly between species, with a higher percentage for velvet bean (66%), compared to the other three species (50 to 60%). {L}egume roots were weakly colonized by {AM} fungi, with similar levels between species. {O}verall, fertilization management did not significantly impact legume biomass, symbioses, or {N}-2 fixation, yet the organo-mineral fertilization significantly increased legume shoot {P} content. {T}he lack of effect of mineral fertilization on {N}-2 fixation and biomass could be due to other nutrient deficiencies ({C}a, {M}g, micronutrients), which can hamper symbioses with rhizobia and mycorrhizae.},
  keywords = {ecological intensification ; plant diversification ; intercropping ; arbuscular mycorrhizal fungi ; rhizobia ; {P} deficiency ; low-fertility ; tropical soil ; low input farming systems ; {MADAGASCAR}},
  booktitle = {},
  journal = {{S}ustainability},
  volume = {13},
  numero = {22},
  pages = {12349 [14 ]},
  year = {2021},
  DOI = {10.3390/su132212349},
  URL = {https://www.documentation.ird.fr/hor/fdi:010083795},
}