SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Majkut, Joseph D.; Sarmiento, J. L.; Rodgers, K. B..

Concerted community efforts have been devoted to producing an authoritative climatology of air-sea CO2 fluxes, but identifying decadal trends in CO2 fluxes has proven to be more challenging. The available surface pCO(2) estimates are too sparse to separate long-term trends from decadal and seasonal variability using simple linear models. We introduce Markov Chain Monte Carlo sampling as a novel technique for estimating the historical pCO(2) at the ocean surface. The result is a plausible history of surface pCO(2) based on available measurements and variability inferred from model simulations. Applying the method to a modern database of pCO(2) data, we find that two thirds of the ocean surface is trending toward increasing uptake of CO2, with a mean (year...

Tipo: Text

Palavras-chave: Carbon; Assimilation; LDEO2010; Trend.

Ano: 2014

URL: https://archimer.ifremer.fr/doc/00290/40156/38724.pdf

Abordagens metodologicas do projeto dinamica sazonal do carbono em campo umido do cerrado.

Infoteca-e

MEIRELLES, M. L.; FRANCO, A. C.; ADUAN, R. E.; ANDRADE, S. R. M.; CARDOSO, A. N.; FEITOZA, L.; CORREA, I. A. M.; AMARAL, G. M..

bitstream/CPAC-2009/24385/1/p2003_30.pdf

Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)

Palavras-chave: ECFLOR600; Campo umido; CO2.; Carbono; Cerrado; Metano; Variação Sazonal.; Carbon; Seasonal variation..

Ano: 2004

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567531

Above and Belowground Biomass Characteristics of Rhizoma Peanut Entries and Their Relationship with Soil C and N.

Absorcao de nitrogenio do solo pelo milho influenciada pela adicao de diferentes residuos de culturas.

SILVA, L. S.; SOLLENBERGER, L. E.; COOLEY, K. D.; KOHMANN, M. M.; ARYAL, P.; PEDREIRA, B. C. e; PEDROSO, G. B.; SILVEIRA, M. L.; DUBEUX JÚNIOR, J. C. B..

In forage systems, soil C and N are affected by many factors including above- and belowground biomass, root exudation, defoliation management, and tissue turnover dynamics. There is need to understand the main drivers of soil C and N accumulation under perennial forages, especially those factors associated with differences in growth and canopy characteristics. The objective was to determine soil C and N status and their relationship with above- and belowground characteristics of six rhizoma peanut (RP, Arachis glabrata) entries. Treatments were Apalachee, Chico, Ecoturf, Ona33, Peace, and Tito RP arranged in four replicates of a randomized complete block design. Stands were planted in 2010 and harvested twice per year after establishment. The area was...

Tipo: Resumo em anais de congresso (ALICE)

Palavras-chave: Forage; Biomass; Carbon; Nitrogen.

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1119669

DEMETRIO, R.; GUERRA, J. G. M.; SANTOS, G. de A.; ALMEIDA, D. L. de; DE POLLI, H.; CAMARGO, F. A. de O..

Avaliou-se o efeito da incorporacao da leguminosa feijao-bravo-do-Ceara (Canavalia brasiliensis) e do capim-coloniao (Panicum maximum) sobre o conteudo de C, N e fracoes da materia organica de um solo Podzolico Vermelho-Amarelo e sobre a producao de materia seca e acumulo de N em milho, cultivado em casa de vegetacao por 102 dias. Os tratamentos constaram da adicao de diferentes doses (20, 40 e 60 t.ha) de feijao-bravo e capim-coloniao, alem de N-mineral e do controle. Observou-se incrementos lineares de 0,088 e 0,068 mg C.g. solo, proporcionados pela incorporacao de uma tonelada de feijao-bravo e capim-coloniao, respectivamente. O conteudo de C das fracoes alcalino-soluveis do material humico nao foi alterado, o que nao se verificou na fracao humina e...

Accumulation des sels nutritifs dans un sédiment lagunaire et environnement hydrodynamique

Palavras-chave: Adubacao verde; Carbono; Acido fulvico; Acido humico; Humina; Podzolico Vermelho-Amarelo; Green manure; Carbon; Fulvic acid; Humic acid; Humin; Podsoil.

Ano: 1998

URL: http://www.alice.cnptia.embrapa.br/handle/doc/84320

Adubação nitrogenada para a cana-de-açúcar colhida crua, em rotação com leguminosas, cultivada em solo de tabuleiro costeiro.

Gomez, E; Millet, B; Picot, B.

The Mejean-Perols Lagoon is situated on the French Mediterranean coast. It is a small (747 ha) and shallow (70 cm) lagoon. Some treated effluent from Montpellier flows into this hypereutrophic lagoon. The cartography of C, N and P concentrations in the sediment was studied based on 35 bottom samples. The nitrogen and organic carbon concentrations were more or less homogeneous, the highest concentrations being found in the middle of the lagoon. The phosphate was principally bound onto the sediment in the west zone. The observed distribution was independent of grain size, the distribution of which was rather homogeneous. In this lagoon water circulation is wind induced. Four different water flow structures were observed, as functions of the prevailing winds...

Tipo: Text

Palavras-chave: Sédiment; Lagune côtière; Hydrodynamique; Sels nutritifs; Carbone; Sediment; Coastal lagoon; Hydrodynamics; Nutrients; Carbon.

Ano: 1998

URL: http://archimer.ifremer.fr/doc/00325/43642/43247.pdf

SILVA, P. de A.; IVO, W. M. P. de M.; SANTIAGO, A. D..

A incorporação de material de elevada relação Carbono/Nitrogênio originário da colheita sem despalha a fogo e os novos cultivares de cana-de-açúcar podem determinar recomendações mais elevadas de adubação nitrogenada para a cultura. Como a adubação nitrogenada tem importante papel nas emissões de gases de efeito estufa, uma forma de diminuir essas emissões pode ser a substituição parcial dos fertilizantes por leguminosas, em rotação com a cana. O objetivo deste trabalho é estabelecer a recomendação de adubação nitrogenada para a cana-de-açúcar colhida crua e cultivada em rotação com leguminosas. Os tratamentos avaliados são: variedades de cana (RB 92579 e RB 867515), rotação com Crotalaria spectabilis, e doses de N (0 e 60 kg ha-1 para cana planta e, nas...

Afforestation to increase the provision of ecosystem services: economic implications for Ukraine and beyond

Palavras-chave: Cana de Açúcar; Palhada; Palha; Resíduo; Resíduo Agrícola; Carbono; Nitrogênio; Adubação; Efeito Estufa; Sugarcane; Carbon; Nitrogen; Greenhouse gases.

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129086

AgEcon

Nijnik, Maria; Oskam, Arie J.; Nijnik, Albert.

This paper analyses costs and benefits of planting trees on marginal lands across forestry zones in Ukraine with the purpose of using them for timber production, erosion prevention and climate change mitigation. The research reveals that establishment of new forests to increase timber production and alleviate soil erosion is economically and environmentally justified in some regions. Incorporating the effects of afforestation through on climate change mitigation increases social benefits.

Tipo: Conference Paper or Presentation

Palavras-chave: Afforestation; Erosion; Carbon; Timber; Cost-benefit analysis; Land Economics/Use; Resource /Energy Economics and Policy.

Ano: 2009

URL: http://purl.umn.edu/51814

Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest

Rev. Bras. Ciênc. Solo

Hanke,Daniel; Dick,Deborah Pinheiro.

ABSTRACT Aggregate stability is one of the most important factors in soil conservation and maintenance of soil environmental functions. The objective of this study was to investigate the aggregate stability mechanisms related to chemical composition of organic matter in soil profiles with humic and histic horizons in a toposequence under Araucaria moist forest in southern Brazil. The soils sampled were classified as Humic Hapludox (highest position), Fluvaquentic Humaquepts (lowest slope position), and Typic Haplosaprists (floodplain). The C and N contents were determined in bulk soil samples. The chemical composition of soil organic matter was evaluated by infrared spectroscopy. Aggregate stability was determined by applying increasing levels of...

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Carbon; Soil structure; Ultrasound energy; Organo-mineral interaction; Hydrophobicity.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100412

Allocation du carbone et métabolisme azoté chez l'haptophyte Tisochrysis lutea

Allometric equations for estimating tree biomass in restored mixed-species Atlantic Forest stands.

Garnier, Matthieu.

The aim of this thesis is to improve knowledge on mechanisms involved in the response to nitrogen limitation and in lipid accumulation in the microalgae haptophyte Tisochrysis lutea. The wild type strain and a lipid accumulating mutant strain were grown under different nitrogen limitation and starvation and analyzed by functional genomics. Four genes of high-affinity nitrate/nitrite transporter (Nrt2) were identified and characterized to reveal the mechanisms involved in mineral absorption in this species. Transcriptomes of both strains were sequenced and proteins affected by nitrogen starvation and differentially expressed between the two strains were identified. We so identified the functions regulated by nitrogen deficiency and potentially involved in...

Tipo: Text

Palavras-chave: Microalgues; Métabolisme; Azote; Carbone; Lipides; Genomique fonctionelle; Protéomique; Transcriptomique; Microalgae; Metabolism; Nitrogen; Carbon; Lipids; Functional genomics; Proteomics; Transcriptomics.

Ano: 2016

URL: http://archimer.ifremer.fr/doc/00353/46378/46000.pdf

NOGUEIRA JUNIOR, L. R.; ENGEL, V. L.; PARROTTA, J. A.; MELO, A. C. G. de; RE, D. S..

Restoration of Atlantic Forests is receiving increasing attention because of its role in both biodiversity conservation and carbon sequestration for global climate change mitigation. This study was carried out in an Atlantic Forest restoration project in the south-central region of Sã o Paulo State ??Brazil to develop allometric equations to estimate tree biomass of indigenous tree species in mixed plantations. Above and below-ground biomass (AGB and BGB, respectively), stem diameter (DBH: diameter at 1.3 m height), tree height (H: total height) and specific wood density (WD) were measured for 60 trees of 19 species. Different biomass equations (linear and nonlinear-transformed) were adjusted to estimate AGB and BGB as a function of DBH, H and...

Allometric models for estimating the phytomass of a secondary Atlantic Forest area of southeastern Brazil

Palavras-chave: Atlantic forest; Mata atlântica; Biodiversity; Biodiversidade; Carbon; Carbono.

Ano: 2014

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1001376

Biota Neotropica

Burger,Déborah Moreira; Delitti,Welington Braz Carvalho.

The purpose of this study was to develop and validate equations to estimate the aboveground phytomass of a 30 years old plot of Atlantic Forest. In two plots of 100 m², a total of 82 trees were cut down at ground level. For each tree, height and diameter were measured. Leaves and woody material were separated in order to determine their fresh weights in field conditions. Samples of each fraction were oven dried at 80 °C to constant weight to determine their dry weight. Tree data were divided into two random samples. One sample was used for the development of the regression equations, and the other for validation. The models were developed using single linear regression analysis, where the dependent variable was the dry mass, and the independent variables...

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Biomass; Allometry; Carbon; Secondary Atlantic Forest; Forest biomass estimation.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000400012

Almacenamiento de carbono en bosques manejados de pinus patula: Estimación mediante percepción remota

Colegio de Postgraduados

Aguirre Salado, Carlos Arturo.

Se presenta la metodología y los resultados obtenidos sobre estimación de almacenamiento de carbono mediante técnicas de percepción remota en bosques manejados de Pinus patula en Zacualtipán, Hidalgo, México; la cual surge como una necesidad de monitoreo de los recursos forestales a partir de los compromisos adquiridos por México en el Protocolo de Kyoto para aminorar el inminente cambio climático causado por los denominados gases invernadero (CO2). En esta tesis se estudia principalmente el carbono (CHA) (Mg/ha) aunque preliminarmente resulta necesaria la cuantificación de biomasa (BHA) (Mg/ha). De manera paralela también se estudian algunos parámetros forestales de densidad como índice de área foliar (IAF) (m2/ m2), cobertura arbórea (COB) (%), área...

Tipo: Tesis

Palavras-chave: Carbono; Índice de área foliar; Cobertura arbórea; Regresión lineal; K-nn; Percepción remota; SPOT 5; Fotografía hemisferica; Bosque de Pinus patula.; Carbon; Leaf area index; Canopy closure; Linear regression; K-nn; Remote sensing; SPOT 5; Hemispherical photography; Pinus patula forest..

Ano: 2007

URL: http://hdl.handle.net/10521/1172

Alterações em atributos químicos de um Latossolo pela aplicação de composto de lixo urbano.

OLIVEIRA, F. C.; MATTIAZZO, M. E.; MARCIANO, C. R.; ABREU JUNIOR, C. H..

Experimento de campo foi conduzido, nos anos agrícolas 1996/97 e 1997/98, para avaliar os efeitos de aplicações sucessivas de composto de lixo urbano sobre os teores de carbono orgânico, condutividade elétrica, pH e capacidade de troca de cátions (CTC) ao pH atual de um Latossolo Amarelo distrófico em que foi cultivada cana-de-açúcar. No primeiro ano agrícola, além dos tratamentos calagem + adubação mineral e testemunha, o composto de lixo foi aplicado nas doses de 20, 40 e 60 Mg ha-1 (base seca). No segundo ano, o composto foi reaplicado nas doses de 24, 48 e 72 Mg ha-1. Todas as propriedades químicas do solo estudadas aumentaram com as doses do composto, em ambos os anos agrícolas. Os incrementos observados nesses atributos, da primeira para a segunda...

Amazon Forest maintenance as a source of environmental services

Palavras-chave: Carbono; Compostos orgânicos; Condutividade elétrica; Ph; Capacidade de troca de cátions; Solo; Carbon; Organic compounds; Electrical conductivity; Cation exchange capacity; Soil.

Ano: 2002

URL: http://www.alice.cnptia.embrapa.br/handle/doc/107375

Anais da ABC (AABC)

Fearnside,Philip M..

Amazonian forest produces environmental services such as maintenance of biodiversity, water cycling and carbon stocks. These services have a much greater value to human society than do the timber, beef and other products that are obtained by destroying the forest. Yet institutional mechanisms are still lacking to transform the value of the standing forest into the foundation of an economy based on maintaining rather than destroying this ecosystem. Forest management for commodities such as timber and non-timber forest products faces severe limitations and inherent contradictions unless income is supplemented based on environmenta lservices. Amazon forest is threatened by deforestation, logging, forest fires and climate change. Measures to avoid...

Tipo: Info:eu-repo/semantics/article

Palavras-chave: Amazonia; Avoided deforestation; Brazil; Carbon; Deforestation; Global warming; Greenhouse effect; Rainforest.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000100006

An observing system simulation for Southern Ocean carbon dioxide uptake

Majkut, Joseph D.; Carter, Brendan R.; Froelicher, Thomas L.; Dufour, Carolina O.; Rodgers, Keith B.; Sarmiento, Jorge L..

The Southern Ocean is critically important to the oceanic uptake of anthropogenic CO2. Up to half of the excess CO2 currently in the ocean entered through the Southern Ocean. That uptake helps to maintain the global carbon balance and buffers transient climate change from fossil fuel emissions. However, the future evolution of the uptake is uncertain, because our understanding of the dynamics that govern the Southern Ocean CO2 uptake is incomplete. Sparse observations and incomplete model formulations limit our ability to constrain the monthly and annual uptake, interannual variability and long-term trends. Float-based sampling of ocean biogeochemistry provides an opportunity for transforming our understanding of the Southern Ocean CO2 flux. In this work,...

Tipo: Text

Palavras-chave: Carbon; Southern Ocean; Observational system simulation experiment.

Ano: 2014

URL: https://archimer.ifremer.fr/doc/00290/40115/38747.pdf

An Operational Framework for Defining and Monitoring Forest Degradation

Ecology and Society

Thompson, Ian D; Canadian Forest Service; ian.thompson@nrcan.gc.ca; Guariguata, Manuel R.; Center for International Forestry Research (CIFOR); M.GUARIGUATA@CGIAR.ORG; Okabe, Kimiko; FFPRI Tsukuba; kimikook@ffpri.affrc.go.jp; Bahamondez, Carlos; INFOR Valdivia; cbahamon@infor.cl; Nasi, Robert; Center for International Forestry Research (CIFOR); r.nasi@cgiar.org; Heymell, Victoria; FAO Rome; Victoria.Heymell@fao.org; Sabogal, Cesar; FAO Rome; cesar.sabogal@fao.org.

Forest degradation is broadly defined as a reduction in the capacity of a forest to produce ecosystem services such as carbon storage and wood products as a result of anthropogenic and environmental changes. The main causes of degradation include unsustainable logging, agriculture, invasive species, fire, fuelwood gathering, and livestock grazing. Forest degradation is widespread and has become an important consideration in global policy processes that deal with biodiversity, climate change, and forest management. There is, however, no generally recognized way to identify a degraded forest because perceptions of forest degradation vary depending on the cause, the particular goods or services of interest, and the temporal and spatial scales considered....

Tipo: Peer-Reviewed Synthesis

Palavras-chave: Biodiversity; Carbon; Criteria and indicators; Forest degradation; Forest management; Remote sensing.

Ano: 2013

Atividade microbiana em solo tratado com fertilizantes organominerais produzidos em diferentes temperaturas de secagem e enriquecidos com micro-organismos.