Soil organic matter pools under management intensification of loblolly pine plantations

Mosier, Samantha; Davies, Christian A.; Kane, Michael B.; Cotrufo, M. Francesca

doi:10.1016/j.foreco.2019.05.056

Cited by 14 publications

(8 citation statements)

References 41 publications

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“…examine the effects of CC treatments on soil C pools and chemical composition, we separated the bulk soil into SOM fractions by size and density, which represent SOM pools with distinct mechanisms of formation, persistence, and functioning(Lavallee et al, 2020). The fractionation scheme was modified from the method described inPoeplau et al (2018) andMosier et al (2019), resulting in three fractions: fPOM, sand-sized oPOM, and silt clay-sized MAOM. Briefly, a 10 g oven-dried soil sample was density fractionated by suspending the soil with 35 ml of 1.85 g cm −3 sodium iodide (NaI) and centrifuging at 1250 g for 60 min.…”

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confidence: 99%

Cover crop functional types differentially alter the content and composition of soil organic carbon in particulate and mineral‐associated fractions

Zhang

Kaye

Bradley

et al. 2022

Global Change Biology

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Cover crops (CCs) can increase soil organic carbon (SOC) sequestration by providing additional OC residues, recruiting beneficial soil microbiota, and improving soil aggregation and structure. The various CC species that belong to distinct plant functional types (PFTs) may differentially impact SOC formation and stabilization.Biogeochemical theory suggests that selection of PFTs with distinct litter quality (C:N ratio) should influence the pathways and magnitude of SOC sequestration.Yet, we lack knowledge on the effect of CCs from different PFTs on the quantity and composition of physiochemical pools of SOC. We sampled soils under monocultures of three CC PFTs (legume [crimson clover]; grass [triticale]; and brassica [canola]) and a mixture of these three species, from a long-term CC experiment in Pennsylvania, USA.

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confidence: 99%

Cover crop functional types differentially alter the content and composition of soil organic carbon in particulate and mineral‐associated fractions

Zhang

Kaye

Bradley

et al. 2022

Global Change Biology

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“…The OC stocks in the organic layer might have been especially important for MAOM formation in our study as the mineral containers were placed at a shallow depth of 5 cm in the mineral soil. Organic C stored in the soil organic layer is more sensitive to management and global changes than OC stored in the MAOM fraction (Grüneberg et al., 2013; Lugato et al., 2021; Mosier et al., 2019). In previous studies, reduced OC stocks in the soil organic layer did not translate into lower MAOM‐C stocks even after several decades of forest management (Grüneberg et al., 2013; Mosier et al., 2019; Schöning et al., 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Organic C stored in the soil organic layer is more sensitive to management and global changes than OC stored in the MAOM fraction (Grüneberg et al., 2013; Lugato et al., 2021; Mosier et al., 2019). In previous studies, reduced OC stocks in the soil organic layer did not translate into lower MAOM‐C stocks even after several decades of forest management (Grüneberg et al., 2013; Mosier et al., 2019; Schöning et al., 2013). Here, we demonstrate that processes reducing OC stocks in the soil organic layer of forests will also have consequences for the input of OM to the MAOM fraction in the topsoil, and thus likely, MAOM‐C stocks in the long term.…”

Section: Discussionmentioning

confidence: 99%

“…(2014) observed an overall 51% decrease in the content of MAOM. In non‐experimental forests, thinning and harvesting effects on OC stocks were usually only detectable in the organic layer (Grüneberg et al., 2013; Mayer et al., 2020; Mosier et al., 2019 and references therein). Therefore, it is not yet clear whether the magnitude of MAOM formation is affected by these forest management practices.…”

Section: Introductionmentioning

confidence: 99%

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Formation of mineral‐associated organic matter in temperate soils is primarily controlled by mineral type and modified by land use and management intensity

Bramble,

Ulrich,

Schöning

et al. 2023

Global Change Biology

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Formation of mineral‐associated organic matter (MAOM) supports the accumulation and stabilization of carbon (C) in soil, and thus, is a key factor in the global C cycle. Little is known about the interplay of mineral type, land use and management intensity in MAOM formation, especially on subdecadal time scales. We exposed mineral containers with goethite or illite, the most abundant iron oxide and phyllosilicate clay in temperate soils, for 5 years in topsoils of 150 forest and 150 grassland sites in three regions across Germany. Results show that irrespective of land use and management intensity, more C accumulated on goethite than illite (on average 0.23 ± 0.10 and 0.06 ± 0.03 mg m−2 mineral surface respectively). Carbon accumulation across regions was consistently higher in coniferous forests than in deciduous forests and grasslands. Structural equation models further showed that thinning and harvesting reduced MAOM formation in forests. Formation of MAOM in grasslands was not affected by grazing. Fertilization had opposite effects on MAOM formation, with the positive effect being mediated by enhanced plant productivity and the negative effect by reduced plant species richness. This highlights the caveat of applying fertilizers as a strategy to increase soil C stocks in temperate grasslands. Overall, we demonstrate that the rate and amount of MAOM formation in soil is primarily driven by mineral type, and can be modulated by land use and management intensity even on subdecadal time scales. Our results suggest that temperate soils dominated by oxides have a higher capacity to accumulate and store C than those dominated by phyllosilicate clays, even under circumneutral pH conditions. Therefore, adopting land use and management practices that increase C inputs into oxide‐rich soils that are under their capacity to store C may offer great potential to enhance near‐term soil C sequestration.

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“…The remaining soil was 2-mm-sieved and dequarantined by heat treatment in a 110 ˚C oven to determine gravimetric moisture content, texture, and SOM fractions. We also kept a subsample of the 8-mm-sieved individual core A-horizon soils (n = 420), which we then 2-mm sieved (removing rocks, roots, and litter) and dequarantined by heat treatment to analyze total soil organic C and total soil N. The mass of the removed materials was used to correct the soil core volume for bulk density (Mosier et al, 2019). The A-horizon SOM fraction data as well as the total soil organic C and total soil N stocks data are a subset of the 1-m-deep soil stocks reported in Mosier et al (2021).…”

Section: Soil Sampling and Processingmentioning

confidence: 99%

Improvements in soil properties under adaptive multipaddock grazing relative to conventional grazing

Mosier

Apfelbaum²,

Byck

et al. 2022

Agronomy Journal

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Within managed ecosystems, such as some livestock grazed grasslands, soil physical, chemical, and biological properties may be severely compromised relative to native grasslands. Conventional grazing (CG) management, commonly referred to as continuous grazing, can affect soil properties and health by reducing soil C stocks and other available nutrients, while creating bare patches in vegetation that may enhance erosion and runoff. In contrast, adaptive multipaddock (AMP) grazing, an intensive form of rotational grazing that moves dense cattle herds quickly over the land followed by rest periods for the regrowth of plants, has been proposed as a regenerative grassland management tool that can improve soil properties such as soil C stocks, soil structure, as well as nutrient and water retention. Our research analyzed soils from 10 grasslands in the southeast United States representing either CG or AMP grazing management. We analyzed the A‐horizons of these soils for physical, chemical, and biological properties considered indicators of soil health across each management type. Chemical soil properties (e.g., cation exchange capacity [CEC], base saturation [BS], electrical conductivity [EC]) were improved where AMP grazing management was implemented. Additionally, farms using AMP grazing management had greater A‐horizon C and N stocks in bulk soils and across multiple soil organic matter (SOM) fractions. No biological indicators measured were affected by the grassland management except potential N mineralization rate, which was lower under AMP. Taken together, these results provide evidence that AMP grazing management could be implemented to regenerate several grassland soil properties across land currently under conventional grazing management.

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Soil organic matter pools under management intensification of loblolly pine plantations

Cited by 14 publications

References 41 publications

Cover crop functional types differentially alter the content and composition of soil organic carbon in particulate and mineral‐associated fractions

Cover crop functional types differentially alter the content and composition of soil organic carbon in particulate and mineral‐associated fractions

Formation of mineral‐associated organic matter in temperate soils is primarily controlled by mineral type and modified by land use and management intensity

Improvements in soil properties under adaptive multipaddock grazing relative to conventional grazing

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