Pasture degradation impacts soil phosphorus storage via changes to aggregate-associated soil organic matter in highly weathered tropical soils

Fonte, Steven J.; Nesper, Maike; Hegglin, Django; Velásquez, Jaime Enrique; Ramírez, Bertha L; Rao, Idupulapati M.; Bernasconi, Stefano M.; Bünemann, Else K.; Frossard, Emmanuel; Oberson, Astrid

doi:10.1016/j.soilbio.2013.09.025

Cited by 109 publications

(93 citation statements)

References 34 publications

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“…If this is the case, these differences in pasture management will probably explain differences observed in soil phosphorus stocks between pastures of the paired sites and regional survey. This is because Fonte et al (2014) found that soils of well-managed pastures located on poor tropical soils had great differences in soil aggregation, which in turn influence the soil phosphorus level, favoring a higher phosphorus content in well-managed pastures compared to degraded pastures. On the other hand, Garcia-Montiel et al (2000) and Hamer et al (2013) found an increase in soil phosphorus stocks for several years after the conversion of Amazonian forests to unfertilized pastures.…”

Section: Land-use Changes Alter Nitrogen and Phosphorus Stocksmentioning

confidence: 99%

“…The use of agricultural practices like no-till may further increases phosphorus concentration in the surface soil due to the non-movement of the soil layer (Pavinatto et al, 2009;Messiga et al, 2010Messiga et al, , 2013. Soil phosphorus is also affected by physical characteristics of the soil, such as how the size of soil aggregates influences the extent of soil phosphorus availability to plants (Fonte et al, 2014). Therefore, agricultural practices have the potential to alter soil phosphorus concentration and consequently soil phosphorus stocks (Tiessen et al, 1982;Tiessen and Stewart, 1983;Ball-Coelho et al, 1993;Aguiar et al, 2013).…”

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confidence: 99%

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Changes in soil carbon, nitrogen, and phosphorus due to land-use changes in Brazil

Groppo

Lins²,

Camargo³

et al. 2015

Biogeosciences

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Abstract. In this paper, soil carbon, nitrogen and phosphorus concentrations and stocks were investigated in agricultural and natural areas in 17 plot-level paired sites and in a regional survey encompassing more than 100 pasture soils In the paired sites, elemental soil concentrations and stocks were determined in native vegetation (forests and savannas), pastures and crop-livestock systems (CPSs). Nutrient stocks were calculated for the soil depth intervals 0-10, 0-30, and 0-60 cm for the paired sites and 0-10, and 0-30 cm for the pasture regional survey by sum stocks obtained in each sampling intervals (0-5, 5-10, 10-20, 20-30, 30-40, 40-60 cm). Overall, there were significant differences in soil element concentrations and ratios between different land uses, especially in the surface soil layers. Carbon and nitrogen contents were lower, while phosphorus contents were higher in the pasture and CPS soils than in native vegetation soils. Additionally, soil stoichiometry has changed with changes in land use. The soil C : N ratio was lower in the native vegetation than in the pasture and CPS soils, and the carbon and nitrogen to available phosphorus ratio (P ME ) decreased from the native vegetation to the pasture to the CPS soils. In the plotlevel paired sites, the soil nitrogen stocks were lower in all depth intervals in pasture and in the CPS soils when compared with the native vegetation soils. On the other hand, the soil phosphorus stocks were higher in all depth intervals in agricultural soils when compared with the native vegetation soils. For the regional pasture survey, soil nitrogen and phosphorus stocks were lower in all soil intervals in pasture soils than in native vegetation soils. The nitrogen loss with cultivation observed here is in line with other studies and it seems to be a combination of decreasing organic matter inputs, in cases where crops replaced native forests, with an increase in soil organic matter decomposition that leads to a decrease in the long run. The main cause of the increase in soil phosphorus stocks in the CPS and pastures of the plot-level paired site seems to be linked to phosphorus fertilization by mineral and organics fertilizers. The findings of this paper illustrate that land-use changes that are currently common in Brazil alter soil concentrations, stocks and elemental ratios of carbon, nitrogen and phosphorus. These changes could have an impact on the subsequent vegetation, decreasing soil carbon and increasing nitrogen limitation but alleviating soil phosphorus deficiency.

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Section: Land-use Changes Alter Nitrogen and Phosphorus Stocksmentioning

confidence: 99%

mentioning

confidence: 99%

Changes in soil carbon, nitrogen, and phosphorus due to land-use changes in Brazil

Groppo

Lins²,

Camargo³

et al. 2015

Biogeosciences

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“…In addition, soils covered with vegetation (as opposed to bare soils) are more resistant to trampling (Junior et al, 2009). Well-managed pastures are more productive and contain more organic matter than degraded pastures, which contributes to soil aggregation and physical protection (Fonte et al, 2013).…”

Section: Factors Related To Sustainability Of Intensificationmentioning

confidence: 99%

Intensification of cattle ranching production systems: socioeconomic and environmental synergies and risks in Brazil

Latawiec

Strassburg

Valentim

et al. 2014

Animal

110

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Intensification of Brazilian cattle ranching systems has attracted both national and international attention due to its direct relation with Amazon deforestation on the one hand and increasing demand of the global population for meat on the other. Since Brazilian cattle ranching is predominantly pasture-based, we particularly focus on pasture management. We summarize the most recurrent opportunities and risks associated with pasture intensification that are brought up within scientific and political dialogues, and discuss them within the Brazilian context. We argue that sustainable intensification of pasturelands in Brazil is a viable way to increase agricultural output while simultaneously sparing land for nature. Since environmental degradation is often associated with low-yield extensive systems in Brazil, it is possible to obtain higher yields, while reversing degradation, by adopting practices like rotational grazing, incorporation of legumes and integrated crop-livestock-forestry systems. Technical assistance is however essential, particularly for small-and medium-scale farmers. Sound complementary policies and good governance must accompany these measures so that a 'rebound effect' does not lead to increased deforestation and other adverse social and environmental impacts. It is also important that animal welfare is not compromised. Although the discussion is presented with respect to Brazil, some aspects are relevant to other developing countries.

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“…Contudo, esse estado é alterado quando o solo passa a ser utilizado para fins agrícolas (BRAIDA; REICHERT, 2014). Quando o sistema solo perde carbono, devido a redução dos teores de matéria orgânica do solo, gera uma diminuição de sua qualidade (LAL, 2015), interferindo na sua agregação (SOUZA et al, 2016;FONTE et al, 2014), porosidade e densidade (ROSSETTI; CENTURION, 2015).…”

Section: Introductionunclassified

Frações Da Materia Orgânica, Indice De Manejo Do Carbono E Atributos Físicos De Um Latossolo Vermelho Sob Diferentes Sistemas De Uso

Balin

Ziech

Oliveira

et al. 2017

RSA

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Resumo -O presente estudo teve como objetivo analisar as frações da matéria orgânica, o índice de manejo do carbono e os atributos físicos de um Latossolo Vermelho sob diferentes sistemas de uso. Quatro áreas distintas de uso do solo foram avaliadas: Lavoura de culturas anuais sob sistema plantio direto há mais de 5 anos (LAV-PD); Pastagem com grama estrela (PAST); Plantio florestal de eucaliptos com 10 anos de idade (EUC); Floresta Ombrófila Mista em estagio médio de regeneração (MATA). Amostras de solo foram coletadas nas camadas de 0,00-0,05, 0,05-0,10, 0,10-0,20 e 0,20-0,40 m para a determinação do teor de carbono orgânico total (COT), do carbono orgânico particulado (COP), do carbono orgânico associado aos minerais (CAM), do diâmetro médio geométrico de agregados (DMG), da densidade do solo (Ds), da macroporosidade (Ma), da microporosidade (Mi) e da porosidade total (Pt). O estudo mostrou a importância de se realizar avaliações quali-quantitativas do teor de carbono do solo (COT, COP e CAM), no intuito de se avaliar de uma forma mais precisa a contribuição dos sistemas de uso sobre a dinâmica do carbono no ambiente e nos atributos físicos do solo. O tratamento MATA mostrou-se ser o sistema mais equilibrado, considerando todas as camadas de solo avaliadas, pois apresentou a maior estabilidade dos agregados, menor Ds e maior percentual de Pt e Ma em relação aos demais tratamentos.Palavras chave -carbono orgânico total, carbono orgânico associado aos minerais, carbono orgânico particulado, agregação, densidade do solo, macroporosidade. Abstract -The present study aimed to analyze fractions of organic matter, carbon management index and the physical attributes of a Red Latossol under different use systems. Four distinct areas of land use had been selected: No-tillage annual crops 5 years old; Area with pasture ; forest area with eucalyptus plantation 10 years old; MixedRain Forest in average stage of regeneration. Soil samples were collected in layers of 0.00-0.05, 0.05-0.10, 0.10-0.20 and 0.20-0.40 m for determination of total organic carbon, particulate organic carbon, organic carbon associated with minerals, the geometric mean diameter of aggregates, bulk density, the macroporosity, the microporosity and total porosity and . The study showed the importance of conducting evaluations quali-quantitative soil carbon content, in order to assess more precisely the contribution of systems for use on the carbon dynamics in the environment and in the physical attributes of the soil. The treatmentForest proved to be the most balanced, considering all the layers of soil are evaluated, as presented greater stability of aggregates, lower bulk density and higher percentage of total porosity and macroporosity compared to other treatments.

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Pasture degradation impacts soil phosphorus storage via changes to aggregate-associated soil organic matter in highly weathered tropical soils

Cited by 109 publications

References 34 publications

Changes in soil carbon, nitrogen, and phosphorus due to land-use changes in Brazil

Changes in soil carbon, nitrogen, and phosphorus due to land-use changes in Brazil

Intensification of cattle ranching production systems: socioeconomic and environmental synergies and risks in Brazil

Frações Da Materia Orgânica, Indice De Manejo Do Carbono E Atributos Físicos De Um Latossolo Vermelho Sob Diferentes Sistemas De Uso

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