Influence of Management on Soil Organic Carbon Dynamics in Northern Mixed-Grass Rangeland

Schuman, G. E.; Ingram, Lachlan J.; Stahl, Peter D.; Derner, Justin D.; Vance, George F.; Morgan, Jack A.

doi:10.2136/sssaspecpub57.2ed.c11

Cited by 4 publications

(4 citation statements)

References 37 publications

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“…In addition, there was a tendency for LFOC to increase with GI in the topsoil, which may be due to foraging and trampling by livestock (Figure S6d ). The foraging and trampling of livestock promote the physical decomposition of plant residues and contact with the soil, which increases the decomposition rate of litter and transfers carbon to the topsoil (Schuman et al, 2015 ; Skjemstad et al, 1986 ). Interestingly, we found that there was a negative correlation between LFOC and shoot biomass in the topsoil and a positive correlation in the mid‐soil and subsoil.…”

Section: Discussionmentioning

confidence: 99%

The main driver of soil organic carbon differs greatly between topsoil and subsoil in a grazing steppe

Liang

et al. 2022

Ecology and Evolution

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Soil organic carbon (SOC) dynamics is regulated by a complex interplay of factors such as climate and potential anthropogenic activities. Livestocks play a key role in regulating the C cycle in grasslands. However, the interrelationship between SOC and these drivers remains unclear at different soil layers, and their potential relationships network have rarely been quantitatively assessed. Here, we completed a six‐year manipulation experiment of grazing exclusion (no grazing: NG) and increasing grazing intensity (light grazing: LG, medium grazing: MG, heavy grazing: HG). We tested light fraction organic carbon (LFOC) and heavy fraction organic carbon (HFOC) in 12 plots along grazing intensity in three soil layers (topsoil: 0–10 cm, mid‐soil: 10–30 cm, subsoil: 30–50 cm) to assess the drivers of SOC. Grazing significantly reduced SOC of the soil profile, but with significant depth and time dependencies. (1) SOC and SOC stability of the topsoil is primarily regulated by grazing duration (years). Specifically, grazing duration and grazing intensity increased the SOC lability of topsoil due to an increase in LFOC. (2) Grazing intensity was the major factor affecting the mid‐soil SOC dynamics, among which MG had significantly lower SOC than did NG. (3) Subsoil organic carbon dynamics were mainly regulated by climatic factors. The increase in mean annual temperature (MAT) may have promoted the turnover of LFOC to HFOC in the subsoil. Synthesis and applications. When evaluating the impacts of grazing on soil organic fraction, we need to consider the differences in sampling depth and the duration of grazing years. Our results highlight that the key factors influencing SOC dynamics differ among soil layers. Climatic and grazing factors have different roles in determining SOC in each soil layer.

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Section: Discussionmentioning

confidence: 99%

The main driver of soil organic carbon differs greatly between topsoil and subsoil in a grazing steppe

Liang

et al. 2022

Ecology and Evolution

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“…O pastoreio também desempenha um papel na manutenção da paisagem, como a abertura da paisagem (ALARY et al, 2011;BLANFORT et al, 2015;DURU et al, 2007). Os solos das pastagens são menos favoráveis à erosão e parecem ter uma estrutura melhor do que as terras agrícolas (SCHUMAN et al, 2002). Além disso, o pastoreio moderado aumenta a produtividade acima do solo e os nutrientes contidos nas folhas em comparação com as áreas sem pastoreio (WILSEY et al, 2002).…”

Section: Função De Produção De Serviços Ecossistêmicosunclassified

“…As pastagens são um sumidouro de carbono, nitrogênio e fósforo. Estima-se que as pastagens contenham até 30% de carbono do mundo orgânico do solo (FAO, 2009;SCHUMAN et al, 2009). A presença de gado no solo pode aumentar a degradação física das plantas e sua incorporação ao solo (SCHUMAN et al, 2009).…”

Section: Função De Produção De Serviços Ecossistêmicosunclassified

“…Estima-se que as pastagens contenham até 30% de carbono do mundo orgânico do solo (FAO, 2009;SCHUMAN et al, 2009). A presença de gado no solo pode aumentar a degradação física das plantas e sua incorporação ao solo (SCHUMAN et al, 2009). Embora o pastoreio intensivo contínuo tenda a diminuir o carbono orgânico do solo e altere a comunidade vegetal e a composição microbiana (INGRAM et al, 2008), o pastoreio adequado pode aumentar a massa de carbono do solo na parte mais ativa do solo, ou seja, os primeiros 30 cm do solo (SCHUMAN et al, 2009).…”

Section: Função De Produção De Serviços Ecossistêmicosunclassified

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Multifuncionalidade da pecuária extensiva: caso do Norte do Uruguai

Opplert

Wlodarski

Barbosa

et al. 2020

RAF

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O Uruguai, inserido no bioma Pampa, tem como principal atividade a pecuária desde o século XVII, mas mostra nas últimas décadas uma mudança no uso do solo. A soja e o arroz substituem pouco a pouco o campo nativo. Quais são as atuais funções da pecuária em sistema extensivo baseado em pastagens naturais no Uruguai frente à concorrência com o agronegócio? Uma revisão da literatura e entrevistas com produtores do Norte do país permitiram destacar cinco metafunções da pecuária: a função social; a função de produção de bens e serviços; a função de serviços ecossistêmicos; a função de segurança e a função de desenvolvimento territorial. Identificar as funções da pecuária extensiva no Uruguai pode ajudar legisladores e os responsáveis por tomadas de decisões a proteger essa atividade e fomentar sua sustentabilidade.

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Spatial Distribution of Roots across Three Dryland Ecosystems and Plant Functional Types

Swindon

Lauenroth

Schlaepfer

et al. 2019

Western North American Naturalist

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Influence of Management on Soil Organic Carbon Dynamics in Northern Mixed-Grass Rangeland

Cited by 4 publications

References 37 publications

The main driver of soil organic carbon differs greatly between topsoil and subsoil in a grazing steppe

The main driver of soil organic carbon differs greatly between topsoil and subsoil in a grazing steppe

Multifuncionalidade da pecuária extensiva: caso do Norte do Uruguai

Spatial Distribution of Roots across Three Dryland Ecosystems and Plant Functional Types

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