Management effects on C accumulation and loss in soils of the southern Appalachian Piedmont of Georgia

Hendrix, Paul F.; Franzluebbers, Alan J.; McCracken, D. V.

doi:10.1016/s0167-1987(98)00113-5

Cited by 54 publications

(20 citation statements)

References 25 publications

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“…38 Mg C ha À 1 in the top 30 cm, which is consistent with peak SOC stocks in the region 13,20,28 . C stocks as high as 51 Mg C ha À 1 (top 20 cm) have been measured in a bottomland Piedmont forest soil (ref.…”

Section: Resultssupporting

confidence: 77%

“…C stocks as high as 51 Mg C ha À 1 (top 20 cm) have been measured in a bottomland Piedmont forest soil (ref. 20 and references within), suggesting that C may continue to accumulate in these intensively grazed pastures over the millennial scales at slower rates 29 . In New Zealand pastures, soil C stocks have been estimated as high as 109 and 138 Mg C ha À 1 (refs 14,17), and once these soils reach a higher SOC level they can become susceptible to C loss if management changes 15 .…”

Section: Resultsmentioning

confidence: 99%

“…In New Zealand pastures, soil C stocks have been estimated as high as 109 and 138 Mg C ha À 1 (refs 14,17), and once these soils reach a higher SOC level they can become susceptible to C loss if management changes 15 . Total C stock will be determined by grass productivity, soil physical and biological attributes, and the degree of physical disturbance, which can all change with future management 11,20,25 .…”

Section: Resultsmentioning

confidence: 99%

“…Highly weathered soils of the subtropics are particularly sensitive to SOM amounts since they often lack minerals, such as 2:1 layer aluminosilicates, with high-nutrientretention capacity 18 . A century of intensive tillage techniques has exacerbated SOM loss and soil erosion on the highly weathered subtropical soils in the southeastern United States 19,20 . However, the long-growing seasons, relatively inexpensive land, regional milk supply shortfalls and high return on investment have fuelled an expanding dairying farming boom 21,22 with B4,000 ha of row crop converted to management-intensive grazing farms in Georgia alone since 2005 (co-author Hancock, personal communication).…”

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confidence: 99%

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Emerging land use practices rapidly increase soil organic matter

et al. 2015

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Emerging land use practices rapidly increase soil organic matter

et al. 2015

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“…Bien que dans la pe´riode qui suit le labour on observe en ge´ne´ral des e´missions de CO 2 supe´rieures a`celles des sols en TCSL (Reicosky et Lindstrom 1993 ;Dao 1998 ;Kessavalou et al 1998;Alvarez et al 2001 ;, il n'y a pas de consensus sur les effets am oyen terme du labour sur ces e´missions. Ces flux peuvent eˆtre plus grands sous TCSL que sous labour (Hendrix et al 1998), identiques (Fortin et al 1996 ;Kessavalou et al 1998 ;Aslam et al 2000) ou plus grands a`certaines pe´riodes et plus petits a`d'autres (Ball et al 2000 ;Vinten et al 2002). Cela conduit a`e´valuer l'effet du labour ou des TCSL sur les e´missions de CO 2 at ravers les bilans de carbone organique des sols qui inte`grent les fluctuations d'e´mission sur le moyen terme, me´thode qui, malgre´les incertitudes de mesure, apparaıˆt la plus fiable pour e´valuer les e´changes de carbone entre le sol et l'atmosphe`re.…”

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Effets des techniques culturales sans labour sur le stockage de carbone dans le sol en contexte climatique tempéré

Métay¹,

Mary²,

Arrouays³

et al. 2009

Can. J. Soil. Sci.

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. Ces valeurs, infe´rieures a`d'autres valeurs largement diffuse´es par ailleurs, et cette variation de´croissante de la capacite´de stockage avec la dure´e de TCSL sont cohe´rentes avec la tendance moyenne observe´e a`partir d'un large e´chantillonnage de donne´es de la litte´rature internationale. L'e´volution de ce stockage de carbone est discute´e en lien avec les indications sur l'e´volution du stock de carbone des sols de cette meˆme re´gion, les indicateurs de stockage potentiel, et les implications lie´es a`l'e´volution du climat. Mots clé s:Techniques de culture sans labour, travail superficiel, semis direct, stockage de carbone, se´questration, mitigation, gaz aè ffet de serre, essai de longue dure´e, climat tempe´reḾ etay, A., Mary, B., Arrouays, D., Labreuche, J., Martin, M., Nicolardot, B. and Germon, J.-C. 2009. Effects of reduced or no tillage practices on C sequestration in soils in temperate regions. Can. J. Soil Sci. 89: 623Á634. Cultivated soils in temperate regions have the potential for carbon storage, which can be used to limit CO 2 emissions with the aid of adapted agricultural practices, and, more particularly, with no-tillage techniques. The C storage capacity was evaluated over a longterm experiment in Boigneville (Basin of Paris, France) and results compared with data from the international literature. The evolution of soil carbon storage under a corn-wheat rotation indicates a tendency for moderate carbon storage under plowed systems (0.10 t C ha(1 yr (1 for 28 yr), reduced tillage or no tillage systems (0.21 t and 0.19 t C ha (1 yr (1 , respectively, for the same period). With no significant difference between direct seeding and reduced tillage, the average effect of these techniques is estimated to be 0.10 t C ha(1 yr (1 for 28 yr. This, however, appears to be moderately lower than the 0.20 t C ha(1 yr (1 estimated for the first 20 yr. The C storage values we have found, showing decreasing storage capacity over time, are consistent with the average tendency drawn from data based on an extensive review of the international literature. In this paper we discuss soil C sequestration, its potential level and the role of climate change in the context of soils from the same region.

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Soil organic carbon dynamics matching ecological equilibrium theory

Caruso

Vries

Bardgett

et al. 2018

Ecology and Evolution

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The persistence of soil organic carbon (SOC) has traditionally been explained as a combination of recalcitrance properties and stabilization processes, which lead to the formation of complex organic compounds. However, recent conceptual advances and experimental evidence challenge this view. Here, we test these conceptual advances using a dynamic equilibrium theory of SOC founded on classic ecological theory. We postulate that the persistence of SOC is an equilibrium point where SOC losses resulting from continuous decomposition and SOC gains due to SOC protection are balanced. We show that we can describe the temporal dynamics of SOC remarkably well (average and median R 2 = 0.75) in publicly available SOC time series from experiments that investigated the effects of agricultural practices in arable soils. The predictive power of our simplistic model is not meant to compete with that of current multi‐pool SOC models or recent developments that include microbial loops. The simplicity of our analysis can, however, show how the conceptual distinction between the forces that control SOC loss and gain, and their equilibrium, can shed light on SOC dynamics. Specifically, our analysis shows that, regardless of specific mechanisms, the persistence of SOC will depend on the ultimate equilibrium between SOC gains and losses, which may depend on environmental (e.g. temperature) and ecological (e.g. spatially structured microbial activities) factors and the relative roles of these factors. Future experimental studies should quantify these roles to formulate a new generation of SOC dynamics model.

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Management effects on C accumulation and loss in soils of the southern Appalachian Piedmont of Georgia

Cited by 54 publications

References 25 publications

Emerging land use practices rapidly increase soil organic matter

Emerging land use practices rapidly increase soil organic matter

Effets des techniques culturales sans labour sur le stockage de carbone dans le sol en contexte climatique tempéré

Soil organic carbon dynamics matching ecological equilibrium theory

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