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Registros recuperados: 37 | |
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SALLES, H. O.; CAVALCANTE, A. C. R.; VALE, N. F. L. do; BRAGA, A. C. L.; GUEDES, F. L.; VIEIRA, L. da S.. |
Para associar a facilidade e rapidez de execução, sem, contudo, afetar a qualidade dos resultados, a equipe da Embrapa Caprinos e Ovinos reuniu a expertise das metodologias da área de parasitologia com as da área de forragicultura e propõe neste documento um método para avaliar a carga parasitária em forrageiras, por meio da simulação das condições de campo em casa de vegetação. |
Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Capim piatã; Nematódeo gastrintestinal; Carga parasitária; Methods; Contamination.; Parasitologia; Forragicultura; Pastagem; Brachiaria brizantha; Nematóide; Helminto gastrintestinal; Contaminação; Caprino; Ovino; Método; Simulação; Estufa.; Sheep; Goats; Nematoda; Helminths; Greenhouse effect; Pastures; Parasitology; Forage.. |
Ano: 2014 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1007056 |
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Burton, J.F.. |
The apparent influence of climatic change on recent changes of range by European insects (Lepidoptera, Orthoptera) For several years I have been collecting data concerning changes in the ranges of European insects, especially Lepidoptera and Orthoptera. The vast majority of those species which have altered their ranges since 1850 have spread to the north, north-west or west (e.g. 96% of the Lepidoptera expanding their ranges). Of the smaller number of species where the range has contracted, the majority (e.g. 75% of the Lepidoptera) have retreated southwards, south-westwards or south-eastwards. I have attempted to correlate these range changes with the main climatic fluctuations from 1850 to the present. Throughout this long period of predominately... |
Tipo: Article in monograph or in proceedings |
Palavras-chave: Europe; Range change; Insects; Climate change; Lepidoptera; Orthoptera; Greenhouse effect; 42.75. |
Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/219849 |
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Zanatta,Josiléia Acordi; Bayer,Cimélio; Vieira,Frederico C.B.; Gomes,Juliana; Tomazi,Michely. |
Nitrogen fertilizers increase the nitrous oxide (N2O) emission and can reduce the methane (CH4) oxidation from agricultural soils. However, the magnitude of this effect is unknown in Southern Brazilian edaphoclimatic conditions, as well as the potential of different sources of mineral N fertilizers in such an effect. The aim of this study was to investigate the effects of different mineral N sources (urea, ammonium sulphate, calcium nitrate, ammonium nitrate, Uran, controlled- release N fertilizer, and urea with urease inhibitor) on N2O and CH4 fluxes from Gleysol in the South of Brazil (Porto Alegre, RS), in comparison to a control treatment without a N application. The experiment was arranged in a randomized block with three replications, and the N... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen fertilization; Environmental impacts; Agriculture; Greenhouse effect. |
Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000500018 |
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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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Registros recuperados: 37 | |
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