Physicochemical properties of soils in the Brazilian Amazon following fire-free land preparation and slash-and-burn practices

Comte, Irina; Davidson, Robert; Lucotte, Marc; Carvalho, C. J. R. de; Oliveira, Francisco de Assis; Silva, Breno Pantoja da; Rousseau, Guillaume Xavier

doi:10.1016/j.agee.2012.05.004

Cited by 59 publications

(41 citation statements)

References 45 publications

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“…Chop-and-mulch, a fire-free technique for land preparation (Denich et al, 2004), conserves nutrients, improves soil quality, and reduces carbon dioxide-equivalent emissions from the soil to the atmosphere in comparison to slash-and-burn, as shown by studies conducted in eastern Amazonia (Sommer et al, 2004;Davidson et al, 2008;Comte et al, 2012;Reichert et al, 2015Reichert et al, , 2016). However, chop-and-mulch has not always increased soil carbon stocks (Perrin et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil

Rangel‐Vasconcelos

Kato

Vasconcelos

et al. 2017

Rev. Bras. Ciênc. Solo

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Improvement of fallow vegetation can have a positive impact on the productivity of slash-and-mulch systems in eastern Amazonia. Phosphorus fertilization can increase biomass and nutrient stocks in the fallow phase, thereby improving nutrient cycling and crop productivity. Here, we compared biomass and nutrient stocks under three fallow management strategies: (1) natural fallow (regrowth vegetation) -NF; (2) NF vegetation improved with leguminous trees (Sclerolobium paniculatum Vogel and Inga edulis Mart.) -IF; and (3) NF vegetation improved with leguminous trees plus phosphorus fertilization -IF +P . We quantified above-and belowground biomass and N, P, K, Ca, and Mg stocks after 23 months of fallow. The IF +P increased aboveground (leaf + branch + stem + liana) biomass and N, P, Ca, and Mg stocks, compared to NF. Similarly, total (aboveground + belowground) biomass and N and P stocks were higher for IF +P than for NF. The differences in aboveground biomass between NF and improved fallow managements were attributed exclusively to the contribution of the tree species enriching fallow vegetation. Phosphorus application increased the aboveground biomass accumulation of the species for fallow improvement. Improving the fallow vegetation with P-fertilized, fast-growing, N-fixing species represents an efficient management strategy to accelerate the reestablishment of biomass and nutrient stocks in slash-and-mulch systems in Amazonia.

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Section: Introductionmentioning

confidence: 99%

Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil

Rangel‐Vasconcelos

Kato

Vasconcelos

et al. 2017

Rev. Bras. Ciênc. Solo

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“…A review by Ribeiro Filho et al (2013) reported negative impact on SOC associated with the conversion stage, modified by the characteristics of the burning. Chop-and-mulch of enriched fallows appears to be a promising alternative to slash-and-burn, conserving soil bulk density, and significantly increasing nutrient concentrations and organic matter content compared to burnt cropland, and a control forest in a study in the Amazon (Comtea et al, 2012).…”

Section: Shifting Cultivationmentioning

confidence: 99%

Global change pressures on soils from land use and management

Smith

House

Bustamante

et al. 2015

Global Change Biology

731

313

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Soils are subject to varying degrees of direct or indirect human disturbance, constituting a major global change driver. Factoring out natural from direct and indirect human influence is not always straightforward, but some human activities have clear impacts. These include land-use change, land management and land degradation (erosion, compaction, sealing and salinization). The intensity of land use also exerts a great impact on soils, and soils are also subject to indirect impacts arising from human activity, such as acid deposition (sulphur and nitrogen) and heavy metal pollution. In this critical review, we report the state-of-the-art understanding of these global change pressures on soils, identify knowledge gaps and research challenges and highlight actions and policies to minimize adverse environmental impacts arising from these global change drivers. Soils are central to considerations of what constitutes sustainable intensification. Therefore, ensuring that vulnerable and high environmental value soils are considered when protecting important habitats and ecosystems, will help to reduce the pressure on land from global change drivers. To ensure that soils are protected as part of wider environmental efforts, a global soil resilience programme should be considered, to monitor, recover or sustain soil fertility and function, and to enhance the ecosystem services provided by soils. Soils cannot, and should not, be considered in isolation of the ecosystems that they underpin and vice versa. The role of soils in supporting ecosystems and natural capital needs greater recognition. The lasting legacy of the International Year of Soils in 2015 should be to put soils at the centre of policy supporting environmental protection and sustainable development.

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“…Recently, factors like population growth, market and forest conservation policies have gradually shorten the fallow length [63,69,80] and exerted huge impacts on the vegetation recovery, carbon sequestration and sustainability of the forest ecosystem [3]. Towards these negative effects of swidden agriculture, governments and scientific communities have always attempted to eradicate the age-old farming practice and seek alternative agriculture systems [3,81,82]. In 1996, Agriculture, Ecosystems & Environment published a special issue (Volume 58, Issue 1) on -Alternatives to Slash-and-Burn Agriculture‖ in the world [7].…”

Section: Viewpoint Of Demisementioning

confidence: 99%

“…Swidden agriculture, also known as shifting cultivation or slash-and-burn farming, is an age-old and prevailing subsistence farming practice in the tropical regions [1][2][3][4]. There are 40-50 countries globally [5] with almost 300-500 million people directly or indirectly carrying out this traditional swiddening system [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A Review of Swidden Agriculture in Southeast Asia

et al. 2014

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Swidden agriculture is by far the dominant land use system in the mountainous regions of Southeast Asia (SEA). It provides various valuable subsistence products to local farmers, mostly the poor ethnic minority groups. Controversially, it is also closely connected with a number of environmental issues. With the strengthening regional economic cooperation in SEA, swidden agriculture has experienced drastic transformations into other diverse market-oriented land use types since the 1990s. However, there is very limited information on the basic geographical and demographic data of swidden agriculture and the socio-economic and biophysical effects of the transformations. International programs, such as the Reducing Emissions from Deforestation and forest Degradation (REDD), underscore the importance of monitoring and evaluating swidden agriculture and its transition to reduce carbon emission due to deforestation and forest degradation. In this context, along with the accessibility of Landsat historical imagery, remote sensing based techniques will offer an effective way to detect and monitor the locations and extent of swidden agriculture. Many approaches for investigating fire occurrence and burned area can be introduced for swidden agriculture mapping due to the common feature of fire relatedness. In this review paper, four broad approaches involving spectral signatures, phenological characteristics, statistical theory and landscape ecology were summarized for swidden agriculture delineation. Five research priorities about swidden agriculture involving remote sensing techniques, spatial pattern, change, drivers and impacts were proposed accordingly. To our knowledge, a synthesis review on the remote sensing and outlook on swidden agriculture has not been reported yet. This review paper aims to give a comprehensive overview of swidden agriculture studies in the domains of debated definition, trends, remote sensing methods and OPEN ACCESSRemote Sens. 2014, 6 1655 outlook research in SEA undertaken in the past two decades.

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Physicochemical properties of soils in the Brazilian Amazon following fire-free land preparation and slash-and-burn practices

Cited by 59 publications

References 45 publications

Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil

Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil

Global change pressures on soils from land use and management

A Review of Swidden Agriculture in Southeast Asia

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