Storage of soil carbon as particulate and mineral associated organic matter in irrigated woody perennial crops

Midwood, Andrew J.; Hannam, Kirsten D.; Gebretsadikan, Tirhas; Emde, David; Jones, Melanie D.

doi:10.1016/j.geoderma.2021.115185

Cited by 31 publications

(9 citation statements)

References 45 publications

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“…Both MAOM C and N were initially relatively lower in the mine compared to the agriculture sites, but after two growing seasons, MAOM C and N were relatively higher in the mine sites. This observation supports the idea that enhanced microbial activity can promote MAOM production (Midwood et al., 2021) and that degraded soils are particularly promising candidates for soil C sequestration (Lal, 2004). There is evidence that low‐nutrient systems such as reclaimed mine sites support relatively more POM than MAOM possibly due to lower decomposition rates and microbial nutrient use efficiencies that would normally support POM decomposition toward MAOM in more nutrient‐rich systems (Cotrufo & Lavallee, 2022; Manzoni et al., 2012).…”

Section: Discussionsupporting

confidence: 83%

Early production of switchgrass (Panicum virgatum L.) and willow (Salix spp.) indicates carbon accumulation potential in Appalachian reclaimed mine and agriculture soil

Grover,

Anderson,

Fleck

et al. 2024

Soil Science Soc of Amer J

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The production of bioproduct feedstocks such as switchgrass (Panicum virgatum L.) and willow (Salix spp.) on degraded lands provides an opportunity to grow dedicated bioenergy crops with the potential to capture and store carbon in the soil while reducing competition with land for food production. However, how the production of these crops alters plant–soil–microbe interactions that govern soil C accumulation in highly degraded soil is underexplored. The objectives of this study were to examine select biological and chemical properties related to stable soil organic matter (SOM) production from the growth of switchgrass and willow on marginal soil over two growing seasons and whether biochar amendment can positively affect these parameters. To address our objectives, paired former surface mined lands and non‐mine impacted marginal agriculture sites were selected across West Virginia, USA, and biochar and unamended control treatments were imposed. Through the first two growing seasons, microbial activity and demand for carbon (C) increased and was accompanied by a shift in extracellular enzyme investment for decomposition‐associated enzymes. Mineral‐associated organic matter C increased over the two growing seasons, and this increase was greater in the mine sites compared to the agriculture sites. Compared to each site's previous land use, C losses were observed under bioproduct systems in the agriculture, but not the mine sites. Biochar amendments did not impact microbial activity but did increase the C:N of SOM. Overall, our results suggest that the early growth of switchgrass and willow can result in C accumulation in marginal and highly degraded lands.

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Section: Discussionsupporting

confidence: 83%

Early production of switchgrass (Panicum virgatum L.) and willow (Salix spp.) indicates carbon accumulation potential in Appalachian reclaimed mine and agriculture soil

Grover,

Anderson,

Fleck

et al. 2024

Soil Science Soc of Amer J

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“…Since there were differences in the vegetation types, coverage rates, and fertilizations [67,68], the average SOM content of the 0-30 cm depth horizon was highest in the woodland, followed by the cultivated land and the sparse forest grassland, and it was the lowest in the grassland, with values of 16.63, 11.36, 7.76, and 6.30 g/kg, respectively (Figure 4). This was consistent with the results of a previous study [69]. During decomposition of SOM by microorganisms, organic acids were released into the Quaternary ancient red soil, which promoted the transformation of silicate-bound iron oxides into poorly crystalline iron oxides [70].…”

Section: Exposed Quaternary Ancient Red Soils Under Different Land Us...supporting

confidence: 93%

Dominant Aggregate Binding Agent Dynamics of Quaternary Ancient Red Soils under Different Land Use Patterns

et al. 2023

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The cementation mechanisms and processes of aggregate binding agents are important in understanding aggregate formation. However, the role of threshold values and the proportions of organic and inorganic binding agents in aggregate formation remain unclear. This research investigated the dominant aggregate binding agent dynamics in a sequence comprising buried ancient red soil unaffected by modern climate changes and human activities, alongside nearby exposed Quaternary ancient red soils subjected to different land use patterns influenced by these factors in northeastern China. By analyzing soil age, aggregate compositions, and organic/inorganic indicators of binding agents, including soil organic matter (SOM), free iron oxide (Fed), poorly crystalline iron oxide (Feo), crystalline iron oxide (Fed-Feo), and total clay particles (TCL), we determined the relative contributions of different binding agents using redundancy analysis (RDA). The results revealed that the buried ancient red soil did not contain dominant binding agents in the aggregate formation before 91.01 ka BP. Due to denudation, the buried ancient red soil was exposed at the surface and experienced the importation of soil organic matter, weathering of silicate-bound iron oxides, and crystallization of poorly crystalline iron oxides resulting from the effects of different land use patterns from 91.01 ka to the present. Under the influence of binding agent dynamics, dominant binding agents in the exposed Quaternary ancient red soils’ aggregate formation changed into SOM and Fed. When the C/(Fed-Feo) molar ratio was less than 2.13, Fed-Feo was the dominant aggregate binding agent. When the C/(Fed-Feo) molar ratio was greater than 2.13, SOM was the dominant aggregate binding agent. The results of this study improve our understanding of aggregate formation and the relationship between soil organic matter and iron oxides.

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“…Plant residues affect soil organic matter accumulation by directly affecting organic matter input and indirectly affecting microbiology to realize the plant residues interact with soil ecosystems [ 35 ]. On the one hand, plant residues directly form soil particulate organic carbon through physical or chemical decomposition [ 36 ]; On the other hand, plant residues circulate through microbial carbon pumps and combine with minerals in the soil to form mineral-bound organic carbon [ 37 ]; meanwhile, plant residues are also one of the carbon sources for microbial metabolism, affecting soil microbial carbon utilization efficiency and microbial residual carbon [ 38 ]. The input of plant residues caused by human interference is a common phenomenon in terrestrial ecosystems, which plays an important role in regulating the nutrient level of terrestrial ecosystems.…”

Section: Discussionmentioning

confidence: 99%

Long-Term Benefits of Cenchrus fungigraminus Residual Roots Improved the Quality and Microbial Diversity of Rhizosphere Sandy Soil through Cellulose Degradation in the Ulan Buh Desert, Northwest China

Li,

Zhang,

et al. 2024

Plants

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Long-term plant residue retention can effectively replenish soil quality and fertility. In this study, we collected rhizosphere soil from the residual roots of annual Cenchrus fungigraminus in the Ulan Buh Desert over the past 10 years. The area, depth, and length of these roots decreased over time. The cellulose content of the residual roots was significantly higher in the later 5 years (2018–2022) than the former 5 years (2013–2017), reaching its highest value in 2021. The lignin content of the residual roots did not differ across samples except in 2015 and reached its highest level in 2021. The total sugar of the residual roots in 2022 was 227.88 ± 30.69 mg·g−1, which was significantly higher than that in other years. Compared to the original sandy soil, the soil organic matter and soil microbial biomass carbon (SMBC) contents were 2.17–2.41 times and 31.52–35.58% higher in the later 3 years (2020–2022) and reached the highest values in 2020. The residual roots also significantly enhanced the soil carbon stocks from 2018–2022. Soil dehydrogenase, nitrogenase, and N-acetyl-β-D-glucosidase (S-NAG) were significantly affected from 2019–2022. The rhizosphere soil community richness and diversity of the bacterial and fungal communities significantly decreased with the duration of the residual roots in the sandy soil, and there was a significant difference for 10 years. Streptomyces, Bacillus, and Sphigomonas were the representative bacteria in the residual root rhizosphere soil, while Agaricales and Panaeolus were the enriched fungal genera. The distance-based redundancy analysis and partial least square path model results showed that the duration of residual roots in the sandy soil, S-NAG, and SMBC were the primary environmental characteristics that shaped the microbial community. These insights provide new ideas on how to foster the exploration of the use of annual herbaceous plants for sandy soil improvement in the future.

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Storage of soil carbon as particulate and mineral associated organic matter in irrigated woody perennial crops

Cited by 31 publications

References 45 publications

Early production of switchgrass (Panicum virgatum L.) and willow (Salix spp.) indicates carbon accumulation potential in Appalachian reclaimed mine and agriculture soil

Early production of switchgrass (Panicum virgatum L.) and willow (Salix spp.) indicates carbon accumulation potential in Appalachian reclaimed mine and agriculture soil

Dominant Aggregate Binding Agent Dynamics of Quaternary Ancient Red Soils under Different Land Use Patterns

Long-Term Benefits of Cenchrus fungigraminus Residual Roots Improved the Quality and Microbial Diversity of Rhizosphere Sandy Soil through Cellulose Degradation in the Ulan Buh Desert, Northwest China

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