Land use changes associated with the expansion of sugar cane crops and their influences on soil removal in a tropical watershed in São Paulo State (Brazil)

Júnior, Antônio Aparecido Couto; Conceição, Fabiano Tomazini da; Fernandes, Alexandre Martins; Spatti, Eder Paulo; Lupinacci, Cenira Maria; Moruzzi, Rodrigo Braga

doi:10.1016/j.catena.2018.09.001

Cited by 32 publications

(10 citation statements)

References 78 publications

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“…Compared to other crops, N loads from fertilizer in sugarcane crops are relatively low, but lead to N soil excess. Moreover, sugarcane also influences soil removal, as changes from natural forest vegetation to intensive sugarcane crops increase soil loss rates from 0.03 to 12.6 t ha À1 year À1 (Junior et al, 2019). As a consequence, the intensification of N and P fertilization and soil loss in sugarcane crop fields increased nutrient exports to rivers (Filoso et al, 2006) that undergo different pathways, including run-off and leaching to groundwater depending on soil characteristics (Basanta et al, 2003;Oliveira et al, 2000Oliveira et al, , 2002.…”

Section: Discussionmentioning

confidence: 99%

Long‐term trophic state responses of a large tropical coastal lagoon to land use changes and nutrient transport

et al. 2021

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The watershed of a large tropical coastal lagoon, historically hosting large sugarcane crops, which has been reduced during the last decades. It suggests that land use and land cover changes (LULCC) would lower the trophic state of the coastal lagoon due to less fertilization application and consequently reducing nutrient transfer into the lagoon. In this context, this study assessed the influence of LULCC, represented by the reduction of the sugarcane crops on the trophic state of a large tropical coastal lagoon. This influence was assessed by means of information about the long-term overall mass-balance budget, involving the estimation of the N and P loads from the sugarcane crops, other anthropogenic sources and natural processes; measurements of the river N and P fluxes into the lagoon; its seaward outflow and the long-term lacustrine nutrient retention. The results indicate that sugarcane crop reduction represented a decrease of 686 t of N and 51 t of P being emitted to the lagoon watershed. However, N and P loads from sugarcane crops were partially replaced by other anthropogenic activities, but even with the reduction of the nutrient fluxes, the long-term supereutrophic responses of the coastal lagoon was maintained. The sediment-related C/N and isotopic composition of the lagoon was sensitive to LULCC, indicating changes on the organic matter inputs into the lagoon. The trophic state was also influenced by the soil N and P accumulation and the long-term nutrient retention within the lagoon imposed by its restricted water connection to the sea.

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Section: Discussionmentioning

confidence: 99%

Long‐term trophic state responses of a large tropical coastal lagoon to land use changes and nutrient transport

et al. 2021

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“…Bioenergy is considered as a renewable substitution of fossil fuels, which may mitigate climate harming GHG emissions and contribute to energy security [84]. However, dedicated energy crops used as a feedstock in biorefineries receive growing caution because of their identified or anticipated negative impact on the environment [6,[10][11][12]. Recently, the search for sustainable substitutes for dedicated energy crops has indicated the usefulness of wastes from agricultural and food production.…”

Section: Searching For Substitutes For Energy Cropsmentioning

confidence: 99%

GHG Emissions and Efficiency of Energy Generation through Anaerobic Fermentation of Wetland Biomass

2020

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We conducted the Life Cycle Analysis (LCA) of energy production from biogas for maize and three types of wetland biomass: reed Phragmites australis, sedges Carex elata, and Carex gracilis, and “grassy vegetation” of wet meadows (WM). Biogas energy produced from maize reached over 90 GJ ha−1, which was more than four times higher than that gained from wetland biomass. However, an estimation of energy efficiency (EE) calculated as a ratio of energy input to the energy produced in a biogas plant showed that the wet fermentation (WF) of maize was similar to the values obtained for dry fermentation (DF) of sedge biomass (~0.30 GJ GJ−1). The greenhouse gases (GHG) emissions released during preparation of the feedstock and operation of the biogas plant were 150 g CO2 eq. kWhel.−1 for DF of sedges and 262 g CO2 eq. kWhel.−1 for WF of Phragmites. Compared to the prevailing coal-based power generation in Central Europe, anaerobic digestion (AD) of wetland biomass could contribute to a reduction in GHG emissions by 74% to 85%. However, calculations covering the GHG emissions during the entire process “from field to field” seem to disqualify AD of conservation biomass as valid low-GHG energy supply technology. Estimated emissions ranged between 795 g CO2 eq. kWhel.−1 for DF of Phragmites and 2738 g CO2 eq. kWhel.−1 for the WM and, in most cases, exceeded those related to fossil fuel technologies.

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“…Neste sentido, diferentes estudos apontam que as propriedades físicas dos solos (MAFRA, 1999;FENDRICH et al, 1997;VAZ et al, 2011;BERTONI;LOMBARDI NETO, 2012;MATHIAS, 2016), a dinâmica dos fluxos superficiais (MAHMOODABADI; SAJJADI, 2016;AL-HAMDAN et al, 2013), a inclinação dos terrenos (SHEN et al, 2016;ZHANG et al, 2019) e o uso e ocupação da terra (NOUWAKPO et al, 2016;CHU et al, 2019;COUTO et al, 2019) constituem-se nos aspectos mais importantes para a avaliação da erosão.…”

Section: Introductionunclassified

A Cartografia de Síntese como Instrumento para a Avaliação do Potencial da Dinâmica Erosiva Linear em Domínio de Cuesta

Stefanuto

Lupinacci²

2021

Rev. Bras. Cartogr.

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A erosão do solo pela água é estimada em um custo anual de bilhões de dólares para o PIB global. Para estudar essa problemática, considera-se que avaliar a disposição espacial dos fenômenos erosivos, assim como a interação das variáveis que influenciam sua dinâmica, constitui-se em uma prerrogativa essencial. Neste sentido, o objetivo deste artigo é apresentar procedimentos metodológicos adotados para o desenvolvimento de cartas de síntese a fim de identificar o potencial dos terrenos ao avanço da erosão linear. As variáveis utilizadas para analisar o potencial erosivo foram a morfometria do relevo, as características físicas dos solos e o uso da terra. Foram utilizados princípios da álgebra de mapas, com destaque para a sobreposição ponderada das variáveis, partindo de influências diferentes para cada uma destas e de técnicas distintas para o estabelecimento de pesos para as classes de cada variável. Os documentos cartográficos criados foram avaliados a partir da comparação destes com dados experimentais de campo e de mapeamentos das feições lineares. Constatou-se que as melhores respostas ocorreram quando se considerou influência equânime para as variáveis físicas e de uso da terra, demonstrando que as feições erosivas são fruto da interação entre a ação humana e as características naturais do terreno. Foi possível também concluir que os procedimentos técnicos que permitem obter bons resultados para avaliar o potencial ao desenvolvimento de voçorocas, não respondem adequadamente para sulcos e ravinas, havendo necessidade de adaptações. Considera-se que as cartas elaboradas, assim como os procedimentos metodológicos desenvolvidos, possuem sustentação para a análise da dinâmica erosiva linear em setores de Cuesta, uma vez que foi possível obter produtos cartográficos que apresentaram boa correspondência espacial com as feições erosivas registradas no terreno.

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Land use changes associated with the expansion of sugar cane crops and their influences on soil removal in a tropical watershed in São Paulo State (Brazil)

Cited by 32 publications

References 78 publications

Long‐term trophic state responses of a large tropical coastal lagoon to land use changes and nutrient transport

Long‐term trophic state responses of a large tropical coastal lagoon to land use changes and nutrient transport

GHG Emissions and Efficiency of Energy Generation through Anaerobic Fermentation of Wetland Biomass

A Cartografia de Síntese como Instrumento para a Avaliação do Potencial da Dinâmica Erosiva Linear em Domínio de Cuesta

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