Nutrient balance of shifting cultivation by burning or mulching in the Eastern Amazon – evidence for subsoil nutrient accumulation

Sommer, Rolf; Vlek, Paul L. G.; Sá, T. D. de A.; Vielhauer, K.; Coelho, Roberta de Fátima Rodrigues; Fölster, H.

doi:10.1023/b:fres.0000019470.93637.54

Cited by 78 publications

(86 citation statements)

References 20 publications

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“…The soil in the study area was classified as Argissolo Vermelho-Amarelo (Udult), sandy (760-880 g kg -1 sand in the 0.00-0.50 m layer), acidic, and characterized by low plant-available P and low cation exchange capacity (Sommer et al, 2004). Some soil chemical and physical properties of the experimental area in June 2007 are presented in table 1.…”

Section: Study Sitementioning

confidence: 99%

“…Slash-and-burn usually increases the short-term availability of base cations and the pH (Béliveau et al, 2015), but soil fertility gradually diminishes afterwards (Sommer et al, 2004). Fine soil particles are lost in the first year of cultivation after slashing and burning in Central Amazonia, suggesting rapid impacts on soil erosion (Béliveau et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Recovery of soil fertility in shifting cultivation often requires long fallow periods (usually 7-10 years) and depends on the reestablishment of biomass vegetation. A shorter fallow period and intensified cultivation period (Metzger et al, 1998;Vielhauer et al, 2001) result in lower biomass and nutrient accumulation (Sommer et al, 2004;Zarin et al, 2005). This scenario leads to reduced productivity during the cultivation period and consequently stimulates the further exploitation of forest remnants.…”

Section: Introductionmentioning

confidence: 99%

“…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%

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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: Study Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…In this region, a 2-year cropping period is alternated with 3 to 7 years of fallow, during which time a woody secondary-forest vegetation regenerates by resprouting from the roots. Traditional burning of fallow vegetation causes most of the carbon, nitrogen, and phosphorus stocks in the aboveground biomass to be lost by volatilization or ash-particle transfer (Sommer et al, 2004). In contrast, the use of mechanized chop-and-mulch technology for land preparation avoids the nutrient losses caused by burning, yet crops grown in the mulch layer do not immediately benefit.…”

Section: Some Further Examples Of Improved Soil Phosphorusmentioning

confidence: 99%

Improving Phosphorus Fertility in Tropical Soils through Biological Interventions

Oberson¹,

Bünemann²,

Friesen³

et al. 2006

Biological Approaches to Sustainable Soil Systems

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Hydrogeochemical balance of forest umbrisol profiles (‘Sierra de Gata’, central western Spain)

Menéndez

Moreno

Gallardo

et al. 2007

Hydrological Processes

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Abstract:Three techniques for obtaining soil water solutions (gravitational and matrical waters extracted using both in situ tension lysimeters and in vitro pressure chambers) and their later chemical analysis were performed in order to know the evolution of the soil-solution composition when water moves down through the soil, from the Ah soil horizon to the BwC-or C-horizons of forest soils located in western Spain. Additionally, ion concentrations and water volumes of input waters to soil (canopy washout) and exported waters (drainage solutions from C-horizons) were determined to establish the net balance of solutes in order to determine the rates of leaching or retention of ions. A generalized process of sorption or retention of most components (even Cl ) was observed, from the soil surface to the C-horizon, in both gravitational and matrical waters, with H 4 SiO 4 , Mn 2C , Na C , and SO 4 2 being the net exported components from the soil through the groundwater. These results enhance the role of the recycling effect in these forest soils. The net percentages of elements retained in these forest soils, considering the inputs and the outputs balance, were 68% K C , 85% Ca 2C , 58% Mg 2C , 7% Al 3C , 5% Fe 3C , 34% Zn 2C , 57% Cl , and 20% NO 3 , and about 75% of dissolved organic carbon was mineralized.

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Nutrient balance of shifting cultivation by burning or mulching in the Eastern Amazon – evidence for subsoil nutrient accumulation

Cited by 78 publications

References 20 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

Improving Phosphorus Fertility in Tropical Soils through Biological Interventions

Hydrogeochemical balance of forest umbrisol profiles (‘Sierra de Gata’, central western Spain)

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