Avaliação do desempenho de adubos verdes antecedendo o plantio de milho, em agroecossistema sob bases ecológicas, Utilizando-se análises multivariadas.

bitstream/item/68818/1/021-moitinho-avaliacao.pdfPublicado também no Cadernos de Agroecologia, v. 7, n. 2, 2012

Soil Co 2 Emission Of Sugarcane Fields As Affected By Topography

The spatial and temporal variation of soil CO 2 emission is influenced by several soil attributes related to CO 2 production and its diffusion in the soil. However, few studies aiming to understand the effect of topography on the variability of CO 2 emissions exist, especially for cropping areas of tropical regions. The objective of this study was to evaluate the spatial and temporal changes of soil CO 2 emission and its relation to soil attributes in an area currently cropped with sugarcane under different relief forms and slope positions. Mean CO 2 emissions in the studied period (seven months) varied between 0.23 and 0.71, 0.27 and 0.90, and 0.31 and 0.80 g m -2 h -1 of CO 2 for concave (Cone), backslope (BackS) and footslope (FootS) positions, respectively. The temporal variability of CO 2 emissions in each area was explained by an exponential relation between the CO 2 emission and soil temperature and a linear relation between CO 2 emission and soil water content. The Q 10 values were 1.98 (± 0.34), 1.81 (± 0.49) and 1.71 (± 0.31) for Conc, BackS and FootS, respectively. Bulk density, macroporosity, penetration resistance, aggregation and oxidizable organic carbon content explain the changes in soil CO 2 emission observed, especially when the Cone position was compared to BackS. The effect of relief form and topographic position on soil CO 2 emission variation was dependent on the time of measurement.6617783ALVENÄS, G., JANSSON, P.E., Model for evaporation, moisture and temperature of bare soil: Calibration and sensitivity analysis (1997) Agricultural and Forest Meteorology, 88, pp. 47-56BERNOUX, M., CARVALHO, M.C.S., VOLKOFF, B., CERRI, C.C., CO 2 emission from mineral soils following land-cover change in Brazil (2001) Global Change Biology, 7, pp. 779-787BERNOUX, M., CARVALHO, M.C.S., VOLKOFF, B., CERRI, C.C., Brazil's soil carbon stocks (2002) Soil Science Society of America Journal, 66, pp. 888-896CAMPOS, D.C., (2003) Potencialidade do sistema de colheita sem queima da cana-de-açúcar para o seqüestro de carbono, , Piracicaba: USP/ESALQ, 103p, Doutorado(2007) Acompanhamento da safra brasileira de cana-de-açúcar, , http://www.conab.gov.br/conabweb/download/safra/3-levantamento0708-nov2007.pdf, COMPANHIA NACIONAL DE ABASTECIMENTO, CONAB, safra, terceiro levantamento, novembro/. Available at:, Accessed 21 Jan. 2008. 2008DANIELS, R.B., HAMMER, R.D., Soil geomorphology (1992) New York: Jonh Wiley, , 236pDAVIDSON, E.A., JANSSENS, I.A., Temperature sensitivity of soil carbon decomposition and feedbacks to climate change (2006) Nature, 440, pp. 165-173DeJONG, E., Soil aeration as affected by slope position and vegetative cover (1981) Soil Science, 131, pp. 34-43Manual de métodos de análise de solo (1997) Rio de Janeiro: Embrapa/CNPS, , EMPRESA BRASILEIRA DE PESQUISA AGROPECUÁRIA, 2 ed, 212pManual de métodos de análise do solo (1979) Rio de Janeiro: Embrapa-SNLCS, , EMPRESA BRASILEIRA DE PESQUISA AGROPECUÁRIA, 247pEPRON, D., BOSC, A., BONAL, D., FREYCON, V., Spatial variation of soil respiration across a topographic gradient in a tropical rain forest in French Guiana (2006) Journal of Tropical Ecology, 22, pp. 565-574FANG, C., MONCRIEFF, J.B., GHOLZ, H.X., CLARK, K.L., Soil CO 2 efflux and its spatial variation in a Florida slash pine plantation (1998) Plant Soil, 205, pp. 135-146FANG, C., MONCRIEFF, J.B., The dependence of soil CO 2 efflux on temperature (2001) Soil Biology and Biochemistry, 33, pp. 155-165FANG, C., MONCRIEFF, J.B., A model for soil CO 2 production and transport. 1. Model development (1999) Agricultural and Forest Meteorology, 95, pp. 225-236GARDNER, W.H., Water content (1986) Agronomy Monograph, 9, pp. 493-541. , KLUTE, A, Ed, Methods of soil analysis. 2 ed. Madison: ASAHANSON, P.J., WULLSCHLEGER, S.D., BOHMAN, S.A., TODD, D.E., Seasonal and topographic patterns of forest floor CO 2 efflux from an upland oak forest (1993) Tree Physiology, 13, pp. 1-15HEALY, R.W., STRIEGL, R.G., RUSSELL, T.F., HUTCHINSON, G.L., LIVINGSTON, G.P., Numerical evaluation of static-chamber measurements of soil-atmosphere gas exchange: Identification of physical processes (1996) Soil Science Society of America Journal, 60, pp. 740-747JIA, S.AKIYAMA, T.MO, WINATOMI, M.KOIZUMI, H. Temporal and spatial variability of soil respiration in a cool temperate broad-leaved forest. 1. Measurement of spatial variance and factor analysis. Japanese Journal of Ecology, v.53, p.13-22, 2003KANG, S., LEE, D., LEE, J., RUNNING, S.W., Topographic and climatic controls on soil environments and net primary in a rugged temperate hardwood forest in Korea (2006) Ecological Research, 21, pp. 64-74KANG, S., DOH, S., LEE, D., LEE, D., JIN, V.L., KIMBALL, J., Topographic and climatic controls on soil respiration in six temperate mixed-hardwood forest slopes, Korea (2003) Global Change Biology, 9, pp. 1427-1437KANG, S., KIM, S., DOH, S., LEE, D., Predicting spatial and temporal patterns of soil temperature based on topography, surface cover and air temperature (2000) Forest Ecology and Management, 136, pp. 173-184KEMPER, W.D.ROSENAU, R.C. Aggregate stability and size distribution. In: KLUTE, A. (Ed.) Methods of soil analysis. 2 ed. Madison: ASA, 1986. p.425-441. (Agronomy Monography, 9)KOSUGI, Y., MITANI, T., ITOH, M., NOGUCHI, S., TANI, M., MATSUO, N., TAKANASHI, S., NIK, A.R., Spatial and temporal variation in soil respiration in a Southeast Asian tropical rainforest (2007) Agricultural and Forest Meteorology, 147, pp. 35-47LA SCALA JÚNIOR, N.MARQUES JÚNIOR, J.PEREIRA, G.T.CORÁ, J.E. Carbon dioxide emission related to chemical properties of a tropical bare soil. Soil Biology and Biochemistry, v.32, p.1469-1473, 2000LI, H., YAN, J., YUE, X., WANG, M., Significance of soil temperature and moisture for soil respiration in a Chinese mountain area (2008) Agriculture and Forest Meteorology, 148, pp. 490-503LLOYD, J., TAYLOR, J.A., On the temperature-dependence of soil respiration (1994) Functional Ecology, 8, pp. 315-323OADES, J.M., Soil organic matter and structural stability: Mechanisms and implications for management (1984) Plant and Soil, 76, pp. 319-337PARKIN, T.B., KASPAR, T.C., SENWO, Z., PRUEGER, J.H., HATFIELD, J.L., Relationship of soil respiration to crop and landscape in the walnut creek watershed (2005) Journal of Hydrometeorology, 6, pp. 812-824PENG, Y., THOMAS, S.C., Soil CO 2 efflux in uneven-aged managed forests: Temporal patterns following harvest and effects of edaphic Heterogeneity (2006) Plant and Soil, 289, pp. 253-264RAIJ, B., van, QUAGGIO, J.A., CANTARELLA, H., FERREIRA, M.E., LOPES, A.S., BATAGLIA, C.O., (1987) Análise química do solo para fins de fertilidade, , Campinas: Fundação Cargill, 170pRAICH, J.W., SCHLESINGER, W.H., The global carbon dioxide flux in soil respiration and its relationship to climate (1992) Tellus, 44 B, pp. 81-99RETH, S., MARKUS, R., FALGE, E., The effect of soil water content, soil temperature, soil pH-value and the root mass on soil CO 2 efflux: A modified model (2005) Plant and Soil, 268, pp. 21-33RISCH, A.C., FRANK, D.A., Carbon dioxide fluxes in a spatially and temporally heterogeneous temperate grassland (2006) Oecologia, 147, pp. 291-302(1998) SAS/STAT: User's guide, , SAS INSTITUTE, Cary: SAS InstituteSCHWERTMANN, U., TAYLOR, R.M., Iron oxides (1989) Minerals in soil environments, pp. 379-438. , DIXON, J. B, WEED, S. B, Ed, Madison: SSSASILVA, A.C.TORRADO, P.V.MARTIN-NETO, L.VASQUEZ, F.M.PÉREZ, M.G. Soil organic matter and geomorphic surface stability relationship in an oxisol toposequence (SE-Brazil). In: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 12., São Pedro, 2004. Proceedings. São Carlos: Embrapa Instrumentação Agropecuária, 2004. v.1, p.623-626SOTTA, E.D., VELDKAMP, E., GUIMARÃES, B.R., PAIXÃO, R.K., RUIVO, M.L.P., ALMEIDA, S.S., Landscape and climatic controls on spatial and temporal variation in soil CO 2 efflux in an Eastern Amazonian Rainforest, Caxiuanã, Brazil (2006) Forest Ecology and Management, 237, pp. 57-64SOUZA, C.K., MARQUES JÚNIOR, J., MARTINS FILHO, M.V., PEREIRA, G.T., Influência do relevo e erosão na variabilidade espacial de um latossolo em Jaboticabal (SP). (2003) Revista Brasileira de Ciência do Solo, 27, pp. 1067-1074SOUZA, Z.M., MARQUES JÚNIOR, J., PEREIRA, G.T., MOREIRA, L.F., Influência da pedoforma na variabilidade espacial de alguns atributos físicos e hídricos de um Latossolo sob cultivo de cana-de-açúcar. (2004) Irriga, 9, pp. 1-11SOUZA, Z.M., MARQUES JÚNIOR, J., PEREIRA, G.T., BARBIERI, D.M., Small relief shape variations influence spatial varaibility of soil chemival attributes (2006) Scientia agricola, 63, pp. 161-168SOUZA, Z.M., MARQUES JÚNIOR, J., PEREIRA, G.T., Variabilidade espacial da estabilidade de agregados e matéria orgânica em solos de relevos diferentes. (2004) Pesquisa Agropecuária Brasileira, 39, pp. 491-499SOUZA, Z.M., MARQUES JÚNIOR, J., PEREIRA, G.T., BENTO, M.J.C., Variabilidade espacial de atributos físicos de um Latossolo Vermelho sob cultivo de cana-de-açúcar. (2004) Revista Brasileira de Engenharia Agrícola e Ambiental, 8, pp. 51-58STOLF, R., Teoria e teste experimental de fórmulas de transformação dos dados de penetrômetro de impacto em resistência do solo. (1991) Revista Brasileira de Ciência do Solo, 15, pp. 229-235XU, M., QI, Y., Soil-surface CO 2 efflux and its spatial and temporal variations in a young ponderosa pine plantation in northern California (2001) Global Change Biology, 7, pp. 667-677YOO, G., SPOMIER, L.A., WANDER, M.M., Regulation of carbon mineralization rates by soil structure and water in an agricultural field and a prairie-like soil (2006) Geoderma, 135, pp. 16-25ZAR, J.H., (1999) Biostatistical analysis, , 4 ed. Upper Saddle River: Prentice Hall, 718

Greenhouse gas mitigation and offset options for beef cattle production under contrasting pasture management systems in Brazil.

This study estimates the GHG balance (emissions and sinks) related to the beef cattle production in three contrasting production scenarios on Brachiaria pasture in Brazil: 1) Degraded pasture (DP), 2) Managed pasture (MP), and 3) Crop?livestock?forest integration system (CLFIS)

A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

Meeting abstrac