Plant Litter Chemical Characteristics Drive Decomposition in Subtropical Rangelands Under Prescribed Fire Management

Kohmann, Marta M.; Silveira, Maria L.; Brandani, Carolina Braga; Sanchez, J. M. D.; Silva, Hiran Marcelo Siqueira da; Vendramini, J. M. B.

doi:10.1016/j.rama.2022.05.002

Cited by 4 publications

(2 citation statements)

References 49 publications

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“…Most of the studies evaluating soil C responses to prescribed fire were conducted in extensively managed rangelands in Florida (Bracho et al, 2021; Ho et al, 2018). Fire occurs naturally in Florida rangelands and is also used to increase forage production while also preventing shrub encroachment (Kohmann et al, 2022). In Florida pine flatwood landscapes, the effects of frequent burning (every 3–4 years) mimic historical conditions and are typically neutral with regard to soil C storage.…”

Section: Discussionmentioning

confidence: 99%

Opportunities to increase soil carbon sequestration in grazing lands in the southeastern United States

Silveira,

Rodrigues da Cruz,

Vendramini

et al. 2024

Grassland Research

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BackgroundGrazing lands provide numerous ecosystem services, including the capacity to store large amounts of soil carbon (C); however, our understanding of the factors affecting soil C responses to management is inadequate.MethodsIn this paper, we synthesized information about the impacts of grazing land management on soil C within the southeastern region of the United States.ResultsMost studies (68%) demonstrated that proper management increased soil C stocks with an average C accumulation rate of 1.4 Mg C ha−1 year−1. The remaining (32%) studies showed no effect of management on soil C. None of the studies reported negative impacts of management on soil C. The largest increase in soil C (8 Mg C ha−1 year−1) was associated with the conversion of cropland to pastureland while overseeding legumes into grass pastures resulted in the lowest C sequestration rates (0.2 Mg C ha−1 year−1).ConclusionsConsidering the rates of soil C accretion and the extensive area occupied by grazing lands, data in this synthesis confirm that the adoption of improved management practices can increase soil C sequestration in the southeastern United States. In addition, because most improved management practices can also have co‐benefits, they may be favorable for forage and livestock production and other ecosystem services.

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Section: Discussionmentioning

confidence: 99%

Opportunities to increase soil carbon sequestration in grazing lands in the southeastern United States

Silveira,

Rodrigues da Cruz,

Vendramini

et al. 2024

Grassland Research

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“…Greater creeping bluestem and wiregrass CP concentration in burned treatments is likely due to the combustion and removal of the senescent material, which has decreased CP concentration ( Akin, 1989 ). In addition, fire increases soil N availability which can also increase plant CP concentration ( Kohmann et al, 2022 ). Increases in CP concentration after prescribed fire has also been reported in several studies ( Archibald and Bond, 2004 ; Anderson et al, 2007 ; Thapa et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Fire management effects on ruminal digestibility and in vitro methane emissions of subtropical rangeland plant species

Cardoso

Silveira

Vendramini

et al. 2023

Translational Animal Science

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Prescribed fire is a common management practice used to manipulate rangeland plant productivity and composition. Although the nutritive value of most herbaceous plant species is considered poor for grazing animals, native rangelands in Florida are an important source of forage for livestock, especially during the winter months, when the productivity of cultivated perennial warm-season pastures is limited. This study evaluated the effects of prescribed fire on methanogenic potential and nutritive value of selected native rangeland plant species. Treatments were a 3 × 2 factorial arrangement of plant species (creeping bluestem [Schizachyrium scoparium var. stoloniferum {Nash} Wipff], wiregrass [Aristida stricta {Michx.}], or saw palmetto [Serenoa repens {W. Bartram} Small]) and prescribed fire management [2 years after burning (control) vs. 1 year after burning (burned)] distributed in a randomized complete block design with four replicates. Samples were analyzed for crude protein (CP), neutral detergent undigestible fiber (NDF), in-vitro methane production, and in-situ ruminal disappearance. Prescribed fire generally increased forage CP and DM effective degradability relative to control; however, no effect was observed on saw palmetto. Wiregrass had the least CP concentration in both burned (8.5%) and control (2.3%). In burned treatments, creeping bluestem and palmetto had greater DM effective degradability (62 and 58%) than wiregrass (53%). Fire increased in-vitro gas production by 60 (creeping bluestem) to 90% (wiregrass) relative to control treatments. No effect of fire on methane production was observed for any of the plant species evaluated in this study. Creeping bluestem had the greatest methane production (12.5 mg/g DM), followed by wiregrass (5.3 mg/g DM) and saw palmetto (1.4 mg/g DM). Methane:DM effective degradability decreased in the following order: creeping bluestem ≥ wiregrass > saw palmetto. Data indicated prescribed fire was an effective tool to increase creeping bluestem and wiregrass nutritive value but no effect was observed on saw palmetto. Cattle grazing grass-dominated rangelands will likely emit more gas and methane than shrub or tree-dominated ecosystems; however, the greater forage nutritive value and subsequent positive impacts on animal production are expected to offset a substantial fraction of enteric methane emissions.

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Short-term impacts of prescribed fire on C, N, and P dynamics in a subtropical rangeland

et al. 2023

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Plant Litter Chemical Characteristics Drive Decomposition in Subtropical Rangelands Under Prescribed Fire Management

Cited by 4 publications

References 49 publications

Opportunities to increase soil carbon sequestration in grazing lands in the southeastern United States

Opportunities to increase soil carbon sequestration in grazing lands in the southeastern United States

Fire management effects on ruminal digestibility and in vitro methane emissions of subtropical rangeland plant species

Short-term impacts of prescribed fire on C, N, and P dynamics in a subtropical rangeland

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