The involvement of organic acids in soil fertility, plant health and environment sustainability

Archives of Microbiology, Journal Year: 2022, Volume and Issue: 204(12)

Published: Nov. 20, 2022

Language: Английский

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RUSSELL REVIEW Are plant roots only “in” soil or are they “of” it? Roots, soil formation and function

European Journal of Soil Science, Journal Year: 2022, Volume and Issue: 73(1)

Published: Jan. 1, 2022

Abstract Roots are near‐ubiquitous components of soils globally but have often been regarded as separate from the soil rather than a substantial factor in determining what is and how it functions. The start rapid formation commenced about 400 million years ago with emergence vascular plants evolution roots associated microbes. microorganisms contribute significantly to by altering rocks minerals through variety biogeochemical processes supply carbon depth that can long residence times. Living root inputs via rhizodeposits more efficient shoot litter forming slow‐cycling, mineral‐associated organic pools. current functionality providing food fuel fibres, supplying plant nutrients, filtering water flood regulation, disease suppression all dependent on activities roots. actively communicating collaborating other organisms for mutual benefit, signals underlying this modulation rhizosphere microbiome being identified. In review I examine (an organ not an organism) affect function conclude that, several perspectives, just “in” “of” definitions should recognise this. A possible definition is: “Soils altered surficial rock or sediment, composed matter, minerals, fluids, whose influenced weathering interactions these roots.” Highlights Paleoclimatic paleosoil research shows key role mycorrhiza formation. Deep living contributors long‐term C storage. Root/microbe signalling facilitates mutualistic symbioses, nutrient uptake suppression. Definitions explicitly include important component system.

Language: Английский

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Role of fertilization regime on soil carbon sequestration and crop yield in a maize-cowpea intercropping system on low fertility soils

Geoderma, Journal Year: 2022, Volume and Issue: 428, P. 116152 - 116152

Published: Sept. 15, 2022

Achieving food security through intensive agricultural practices on low fertility soils is challenging as crop productivity increasingly curtailed by the loss of soil structural stability and rapid depletion organic carbon (SOC). As such, conversion from traditional mono-cropping to legume-cereal intercropping, especially with integrated fertilization, may increase yields least ecological footprint. We set up a 2-year field experiment in split-plot design cowpea-maize monoculture intercropping under different organic–inorganic fertilization regimes, including no (control), input only (compost), chemical (NPK), multi-nutrient enriched compost (NPKEC). observed that intercropped maize had significantly higher biomass yield compared corresponding when fertilized NPKEC fertilizer. However, cowpea differences between plots were comparable all regimes. In contrast, grain advantage both was enhanced system monoculture, showing most significant effect among When comparing relative contribution regime SOC, fertilizer provided highest SOC-sequestration (0.30 Mg C/ha yr−1). At same time, cropping C-sequestration showed (0.17 yr−1) monocultures crops. Although application increased mineral associated (MAOC) particulate (PAOC) concentrations unfertilized control plots, effective combination causing greatest C pools over time. Based redundancy analysis (RDA), positive association MAOC PAOC suggests importance fractions primary reservoirs conducting SOC storage. Importantly, although alone lower C-sequestration, it better structure confirmed its relationship macro-and micro-aggregation, water stable aggregates (WSA), mean weight diameter (MDA). Overall, our results indicate restoring degraded appropriate land management solutions, such stoichiometrically balanced (NPKEC) diversification (intercropping), order achieve gains storage and, ultimately, improve productivity.

Language: Английский

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Mineral reactivity determines root effects on soil organic carbon

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Aug. 16, 2023

Modern conceptual models of soil organic carbon (SOC) cycling focus heavily on the microbe-mineral interactions that regulate C stabilization. However, formation 'stable' (i.e. slowly cycling) matter, which consists mainly microbial residues associated with mineral surfaces, is inextricably linked to loss through respiration. Therefore, what net impact metabolism total quantity held in soil? To address this question, we constructed artificial root-soil systems identify controls across plant-microbe-mineral continuum, simultaneously quantifying mineral-associated and SOC losses Here show root exudates minerals interacted these processes: while roots stimulated respiratory depleted pools low-activity clays, triggered stable high-activity clays. Moreover, observed a positive correlation between This suggests growth slow-cycling comes at expense from system.

Language: Английский

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Soil carbon losses due to priming moderated by adaptation and legacy effects

Nature Geoscience, Journal Year: 2023, Volume and Issue: 16(10), P. 909 - 914

Published: Oct. 1, 2023

Language: Английский

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