Publicação
Microbial consortium increases maize productivity and reduces grain phosphorus concentration under field conditions
| Resumo: | Background:The use of microbes that improve plant phosphorus (P) use efficiency is an avenue to boostcrop yields while alleviating environmental impacts. We tested three microbial inoculants (Rhizoglomusirregularealone – designated AMF;Pseudomonas putidaalone – designated PSB; andR. irregulareandP. putidain consortium – designated AMF+PSB), combined with chemical fertilizers, in an intensive maizeagricultural system.Results:As hypothesized: (i) despite the native soil microbial community and the application of P fertil-izer, the microbial inoculants enhanced plant P uptake from the soil by 14–60%, and consequentlyimproved P acquisition efficiency; (ii) PSB and AMF+PSB plants produced ±50% more biomass per unitof P taken up, and consequently enhanced plant internal P use efficiency (i.e. the biomass producedper unit of P); and (iii) the combined inoculation of AMF and PSB provided the best results in terms ofproductivity and P use efficiency. Further, the microbial inoculants altered P allocation within the plant,reducing grain P concentration.Conclusion:By testing the microbial inoculants under field conditions, our study clearly shows that themicrobial consortium (AMF+PSB) increased maize productivity, and at the same time improved P use effi-ciency. Further, the use of these microbial inoculants was shown to be compatible with conventionalagricultural management practices. |
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| Autores principais: | Pacheco, Inês |
| Outros Autores: | Ferreira, Rodolfo; Correia, Patrícia; Carvalho, Luis M; Dias, Teresa; Cruz, Cristina |
| Assunto: | Arbuscular mycorrhizal fungi Grain phytate Microbial consortium Phosphate solubilizing bacteria Phosphorus acquisition efficiency Plant internal phosphorus use efficiency |
| Ano: | 2021 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | Background:The use of microbes that improve plant phosphorus (P) use efficiency is an avenue to boostcrop yields while alleviating environmental impacts. We tested three microbial inoculants (Rhizoglomusirregularealone – designated AMF;Pseudomonas putidaalone – designated PSB; andR. irregulareandP. putidain consortium – designated AMF+PSB), combined with chemical fertilizers, in an intensive maizeagricultural system.Results:As hypothesized: (i) despite the native soil microbial community and the application of P fertil-izer, the microbial inoculants enhanced plant P uptake from the soil by 14–60%, and consequentlyimproved P acquisition efficiency; (ii) PSB and AMF+PSB plants produced ±50% more biomass per unitof P taken up, and consequently enhanced plant internal P use efficiency (i.e. the biomass producedper unit of P); and (iii) the combined inoculation of AMF and PSB provided the best results in terms ofproductivity and P use efficiency. Further, the microbial inoculants altered P allocation within the plant,reducing grain P concentration.Conclusion:By testing the microbial inoculants under field conditions, our study clearly shows that themicrobial consortium (AMF+PSB) increased maize productivity, and at the same time improved P use effi-ciency. Further, the use of these microbial inoculants was shown to be compatible with conventionalagricultural management practices. |
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