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Freitas,Rita de Cássia Alves de; Popin,Gustavo Vicentini; Milori,Débora Marcondes Bastos Pereira; Signor,Diana; Drumond,Marcos Antônio; Cerri,Carlos Eduardo Pellegrino. |
ABSTRACT The substitution of native vegetation by agricultural ecosystems can change the quantity and quality of soil organic matter (SOM), and the intensity of these changes depends on the soil type, climate, and land use. The objective of this study was to evaluate the quality of organic matter in chronosequences of Jatropha cultivation in contrasting soil and climatic conditions. Soil samples were evaluated at depths of 0.00-0.10, 0.20-0.30, and 0.80-1.00 m in chronosequences located in Planaltina, Distrito Federal (Cerrado-Pasture-Jatropha), Dourados, Mato Grosso do Sul (Atlantic Forest-Corn-Jatropha), and Araripina, Pernambuco (Caatinga-Jatropha). To assess SOM quality, we determined C contents in the SOM fractions, C stocks, the carbon management... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Land use change; Soil carbon fractionation; Carbon management index; Laser-induced fluorescence spectroscopy; Microbial biomass. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100508 |
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Cherubin,Maurício Roberto; Oliveira,Dener Márcio da Silva; Feigl,Brigitte Josefine; Pimentel,Laisa Gouveia; Lisboa,Izaias Pinheiro; Gmach,Maria Regina; Varanda,Letícia Leal; Morais,Maristela Calvente; Satiro,Lucas Santos; Popin,Gustavo Vicentini; Paiva,Sílvia Rodrigues de; Santos,Arthur Klebson Belarmino dos; Vasconcelos,Ana Luisa Soares de; Melo,Paul Lineker Amaral de; Cerri,Carlos Eduardo Pellegrino; Cerri,Carlos Clemente. |
ABSTRACT: The use of crop residues as a bioenergy feedstock is considered a potential strategy to mitigate greenhouse gas (GHG) emissions. However, indiscriminate harvesting of crop residues can induce deleterious effects on soil functioning, plant growth and other ecosystem services. Here, we have summarized the information available in the literature to identify and discuss the main trade-offs and synergisms involved in crop residue management for bioenergy production. The data consistently showed that crop residue harvest and the consequent lower input of organic matter into the soil led to C storage depletions over time, reducing cycling, supply and availability of soil nutrients, directly affecting the soil biota. Although the biota regulates key... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy feedstock; Soil quality; Sugarcane; Greenhouse gas emissions. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300255 |
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