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| Registros recuperados: 29 | |
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| Venzke Filho,Solismar de Paiva; Feigl,Brigitte Josefine; Piccolo,Marisa de Cássia; Fante Jr.,Lorival; Siqueira Neto,Marcos; Cerri,Carlos Clemente. |
| Some root parameters such as distribution, length, diameter and dry matter are inherent to plant species. Roots can influence microbial population during vegetative cycle through the rhizodeposits and, after senescence, integrating the soil organic matter pool. Since they represent labile substrates, especially regarding nitrogen, they can determine the rate of nutrient availability to the next crop cultivated under no-tillage (NT). The root systems of two crop species: maize (Zea mays L.) cultivar Cargill 909 and soybean [Glycine max (L.) Merr.] cultivar Embrapa 59, were compared in the field, and their influence on spatial distribution of the microbial C and N in a clayey-textured Typic Hapludox cultivated for 22 years under NT, at Tibagi, State of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Root distribution; Maize; Soybean; Carbon; Nitrogen. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000500011 |
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| Cerri,Carlos Clemente; Maia,Stoecio Malta Ferreira; Galdos,Marcelo Valadares; Cerri,Carlos Eduardo Pellegrino; Feigl,Brigitte Josefine; Bernoux,Martial. |
| Data from the 1990-1994 period presented in the "Brazil's Initial National Communication" document indicated that the country is one of the top world greenhouse gas (GHG) emitters. A large majority of Brazil's GHG emissions come from deforestation mainly of the Amazon biome for agriculture and livestock land uses. This unique inventory is now out of date. Thus, the aims of this review were (i) to update estimates of the GHG emissions for the Brazilian territory, (ii) to estimate the sinks to provide calculations of the GHG net emissions for the 1990-2005 period, (iii) to calculate the actual and estimate shares of agricultural and livestock activities, and (iv) to discuss in light of the new figures and patterns the best mitigation options for Brazil.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CO2-equivalent (CO2-eq); Soil; Inventory; Land use change and forestry. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600017 |
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| Cerri,Carlos Clemente; Bernoux,Martial; Maia,Stoecio Malta Ferreira; Cerri,Carlos Eduardo Pellegrino; Costa Junior,Ciniro; Feigl,Brigitte Josefine; Frazão,Leidivan Almeida; Mello,Francisco Fujita de Castro; Galdos,Marcelo Valadares; Moreira,Cindy Silva; Carvalho,João Luis Nunes. |
| National inventories of anthropogenic greenhouse gas (GHG) emissions (implementation of the National Communications) are organized according to five main sectors, namely: Energy, Industrial Processes, Agriculture, Land-Use Change and Forestry (LUCF) and Waste. The objective of this study was to review and calculate the potential of greenhouse gas mitigation strategies in Brazil for the Agricultural and LUCF. The first step consisted in an analysis of Brazilian official and unofficial documents related to climate change and mitigation policies. Secondly, business as usual (BAU) and mitigation scenarios were elaborated for the 2010-2020 timeframe, and calculations of the corresponding associated GHG emissions and removals were performed. Additionally, two... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: IPCC; EX-ACT; Emission reduction; Carbon fixation. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100015 |
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| Cerri,Carlos Eduardo P.; Sparovek,Gerd; Bernoux,Martial; Easterling,Willian E.; Melillo,Jerry M.; Cerri,Carlos Clemente. |
| The intensive land use invariably has several negative effects on the environment and crop production if conservative practices are not adopted. Reduction in soil organic matter (SOM) quantity means gas emission (mainly CO2, CH4, N2O) to the atmosphere and increased global warming. Soil sustainability is also affected, since remaining SOM quality changes. Alterations can be verified, for example, by soil desegregation and changes in structure. The consequences are erosion, reduction in nutrient availability for the plants and lower water retention capacity. These and other factors reflect negatively on crop productivity and sustainability of the soil-plant-atmosphere system. Conversely, adoption of "best management practices", such as conservation tillage,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Climate change; Greenhouse effect; Soil organic matter; Management practices. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100013 |
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| Mazzetto,Andre Mancebo; Feigl,Brigitte Josefine; Cerri,Carlos Eduardo Pellegrino; Cerri,Carlos Clemente. |
| Abstract Land use changes strongly impact soil functions, particularly microbial biomass diversity and activity. We hypothesized that the catabolic respiration response of the microbial biomass would differ depending on land use and that these differences would be consistent at the landscape scale. In the present study, we analyzed the catabolic response profile of the soil microbial biomass through substrate-induced respiration in different land uses over a wide geographical range in Mato Grosso and Rondônia state (Southwest Amazon region). We analyzed the differences among native areas, pastures and crop areas and within each land use and examined only native areas (Forest, Dense Cerrado and Cerrado), pastures (Nominal, Degraded and Improved) and crop... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon region; Land use change; Catabolic profile; Microbial communities. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000100063 |
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| Registros recuperados: 29 | |
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