Soil organic carbon sequestration in temperate agroforestry systems – A meta-analysis

Mayer, Steffi; Wiesmeier, Martin; Sakamoto, Eva; Hübner, Rico; Cardinael, Rémi; Kühnel, Anna; Kögel‐Knabner, Ingrid

doi:10.1016/j.agee.2021.107689

Cited by 73 publications

(51 citation statements)

References 102 publications

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“…Mayer et al (2022) reviewed data on sequestration of C under agroforestry systems at 61 sites in temperate regions. The sites ranged from 4 to 83 years since establishment and covered three main soil types, reflecting the main classes used for agriculture in temperate regions: Luvisols, Chernozems and Cambisols.…”

Section: Agroforestrymentioning

confidence: 99%

Is it possible to attain the same soil organic matter content in arable agricultural soils as under natural vegetation?

et al. 2022

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Clearing natural vegetation to establish arable agriculture (cropland) almost invariably causes a loss of soil organic carbon (SOC). Is it possible to restore soil that continues in arable agriculture to the pre-clearance SOC level through modified management practices? To address this question we reviewed evidence from long-term experiments at Rothamsted Research, UK, Bad Lauchstädt, Germany, Sanborn Field, USA and Brazil and both experiments and surveys of farmers’ fields in Ethiopia, Australia, Zimbabwe, UK and Chile. In most cases SOC content in soil under arable cropping was in the range 38–67% of pre-clearance values. Returning crop residues, adding manures or including periods of pasture within arable rotations increased this, often to 60–70% of initial values. Under tropical climatic conditions SOC loss after clearance was particularly rapid, e.g. a loss of >50% in less than 10 years in smallholder farmers’ fields in Zimbabwe. If larger yielding crops were grown, using fertilizers, and maize stover returned instead of being grazed by cattle, the loss was reduced. An important exception to the general trend of SOC loss after clearance was clearing Cerrado vegetation on highly weathered acidic soils in Brazil and conversion to cropping with maize and soybean. Other exceptions were unrealistically large annual applications of manure and including long periods of pasture in a highly SOC-retentive volcanic soil. Also, introducing irrigated agriculture in a low rainfall region can increase SOC beyond the natural value due to increased plant biomass production. For reasons of sustainability and soil health it is important to maintain SOC as high as practically possible in arable soils, but we conclude that in the vast majority of situations it is unrealistic to expect to maintain pre-clearance values. To maintain global SOC stocks at we consider it is more important to reduce current rates of land clearance and sustainably produce necessary food on existing agricultural land.

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Section: Agroforestrymentioning

confidence: 99%

Is it possible to attain the same soil organic matter content in arable agricultural soils as under natural vegetation?

et al. 2022

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“…Some other studies have presented some management choices for restoring soil C representation, including conservation tillage [65,70], cropping systems [71], legume-based crop rotation [72,73], cover crops [54], integrated nutrient management [74,75], irrigation management [76], agroforestry systems [77,78], and grass land/pasture management [79].…”

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confidence: 99%

Plant Nutrition under Climate Change and Soil Carbon Sequestration

et al. 2022

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The climate is one of the key elements impacting several cycles connected to soil and plant systems, as well as plant production, soil quality, and environmental quality. Due to heightened human activity, the rate of CO2 is rising in the atmosphere. Changing climatic conditions (such as temperature, CO2, and precipitation) influence plant nutrition in a range of ways, comprising mineralization, decomposition, leaching, and losing nutrients in the soil. Soil carbon sequestration plays an essential function—not only in climate change mitigation but also in plant nutrient accessibility and soil fertility. As a result, there is a significant interest globally in soil carbon capture from atmospheric CO2 and sequestration in the soil via plants. Adopting effective management methods and increasing soil carbon inputs over outputs will consequently play a crucial role in soil carbon sequestration (SCseq) and plant nutrition. As a result, boosting agricultural yield is necessary for food security, notoriously in developing countries. Several unanswered problems remain regarding climate change and its impacts on plant nutrition and global food output, which will be elucidated over time. This review provides several remarkable pieces of information about the influence of changing climatic variables on plant nutrients (availability and uptake). Additionally, it addresses the effect of soil carbon sequestration, as one of climate change mitigations, on plant nutrition and how relevant management practices can positively influence this.

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“…However, obviously what we call the environment is a quite complex system (albeit probably not more than a human body) that requires transdisciplinary approaches encompassing disciplines that have so far remained separate. For instance, it is shocking that models of C capture by forests tend to ignore soil microorganisms as active agents in the process [ 175 ]. This is just but one example that exposes the fractionation that environmental studies still endure.…”

Section: Discussionmentioning

confidence: 99%

Environmental Galenics: large-scale fortification of extant microbiomes with engineered bioremediation agents

de Lorenzo

2022

Phil. Trans. R. Soc. B

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Contemporary synthetic biology-based biotechnologies are generating tools and strategies for reprogramming genomes for specific purposes, including improvement and/or creation of microbial processes for tackling climate change. While such activities typically work well at a laboratory or bioreactor scale, the challenge of their extensive delivery to multiple spatio-temporal dimensions has hardly been tackled thus far. This state of affairs creates a research niche for what could be called Environmental Galenics (EG), i.e. the science and technology of releasing designed biological agents into deteriorated ecosystems for the sake of their safe and effective recovery. Such endeavour asks not just for an optimal performance of the biological activity at stake, but also the material form and formulation of the agents, their propagation and their interplay with the physico-chemical scenario where they are expected to perform. EG also encompasses adopting available physical carriers of microorganisms and channels of horizontal gene transfer as potential paths for spreading beneficial activities through environmental microbiomes. While some of these propositions may sound unsettling to anti-genetically modified organisms sensitivities, they may also fall under the tag of TINA (there is no alternative) technologies in the cases where a mere reduction of emissions will not help the revitalization of irreversibly lost ecosystems. This article is part of the theme issue ‘Ecological complexity and the biosphere: the next 30 years’.

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Soil organic carbon sequestration in temperate agroforestry systems – A meta-analysis

Cited by 73 publications

References 102 publications

Is it possible to attain the same soil organic matter content in arable agricultural soils as under natural vegetation?

Is it possible to attain the same soil organic matter content in arable agricultural soils as under natural vegetation?

Plant Nutrition under Climate Change and Soil Carbon Sequestration

Environmental Galenics: large-scale fortification of extant microbiomes with engineered bioremediation agents

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