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| Registros recuperados: 238 | |
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| Medeiros,Paulo Ricardo Petter; Knoppers,Bastiaan Adriaan; Cavalcante,Geórgenes Hilário; Souza,Weber Friederichs Landim de. |
| The aim of this study was to investigate the post-dam conditions of the loads and yields of dissolved inorganic nitrogen (DIN), orthophosphate (DIP, silicate (DSi) and total phosphorous (TP) in the Lower São Francisco river estuary (NE-Brazil) after the river was regulated to a constant flow by the dams. Loads and yields of monthly measurements performed from November 2000 to March 2002 at a gauging station downstream of the dams (80 km from the coast) showed 4.1 x 10³ t/yr and 0.006 t/km² /yr of DIN, 0.2 x 10³ t/yr and 0.002 t/km² /yr of DIP, and 448 x 10³ t/yr and 0.71 t/km² /yr of DSi, respectively. Over the last 15 years, DIN loads reduced by 94 % and DSi by 31%. The river turned into an oligotrophic system with primary production limited by nitrogen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrients; Fluvial loads; Dam impacts; Estuary; São Francisco River (NE-Brazil). |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200022 |
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| Le Bec, Claude; Legendre, Aurelie; Messiaen, Gregory. |
| Time series of physico-chemical data and concentrations (cell L-1) of the toxic dinoflagellate Alexandrium minutum collected in the Rance macrotidal estuary (Brittany, France) were analyzed to understand the physico-chemical processes of the estuary and their relation to changes in bloom development from 1996 to 2009. The construction of the tidal power plant in the north and the presence of a lock in the south have greatly altered hydrodynamics, blocking the zone of maximum turbidity upstream, in the narrowest part of the estuary. Alexandrium minutum occurs in the middle part of the estuary. Most physical and chemical parameters of the Rance estuary are similar to those observed elsewhere in Brittany with water temperatures between 15–18 °C, slightly... |
| Tipo: Text |
Palavras-chave: Harmful algae; Dinoflagellate; Nutrients; Eutrophication; Drainage basin; Land runoff. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00341/45257/44698.pdf |
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| Henley, Sian F.; Cavan, Emma L.; Fawcett, Sarah E.; Kerr, Rodrigo; Monteiro, Thiago; Sherrell, Robert M.; Bowie, Andrew R.; Boyd, Philip W.; Barnes, David K. A.; Schloss, Irene R.; Marshall, Tanya; Flynn, Raquel; Smith, Shantelle. |
| The Southern Ocean plays a critical role in regulating global climate as a major sink for atmospheric carbon dioxide (CO2), and in global ocean biogeochemistry by supplying nutrients to the global thermocline, thereby influencing global primary production and carbon export. Biogeochemical processes within the Southern Ocean regulate regional primary production and biological carbon uptake, primarily through iron supply, and support ecosystem functioning over a range of spatial and temporal scales. Here, we assimilate existing knowledge and present new data to examine the biogeochemical cycles of iron, carbon and major nutrients, their key drivers and their responses to, and roles in, contemporary climate and environmental change. Projected increases in... |
| Tipo: Text |
Palavras-chave: Southern Ocean; Biogeochemistry; Primary production; Iron; Nutrients; Carbon; Ecosystem; Ocean acidification. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00676/78831/81113.pdf |
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| Salazar,Francisco; Dumont,Juan Carlos; Chadwick,David; Saldaña,Rodolfo; Santana,Mabel. |
| In this study 50 slurry samples were collected from commercial dairy farms located in the South of Chile during 1995-1997. Samples were analyzed for dry matter, pH, organic matter, available and total macro nutrients (nitrogen, phosphorus, potassium, calcium, magnesium and sodium), available and total micro nutrients (zinc, iron, manganese and copper) and total aluminum. Results showed that the dry matter content in dairy effluents was low, with 62% of the samples being < 4% DM. This reflected the large volumes of water that the storage received. A great variation in nutrient content was observed in the analyzed samples, probably reflecting differences in feeding regimes, use of wash water, rainfall and age of slurry at the time of sampling. In general,... |
| Tipo: Journal article |
Palavras-chave: Nutrients; Dairy effluents; Cattle slurry; Farm waste. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072007000200005 |
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| Magalhães,Adriana G.; Rolim,Mario M.; Duarte,Anamaria S.; Pedrosa,Elvira M. R.; Silva,Enio F. de F. e. |
| The aim of this study was to evaluate chemical attributes alterations of a clay-loam textured soil and dry mass accumulation of maize submitted to application of cassava wastewater doses in three assessment periods. The experiment was conducted under greenhouse using a completely randomized experimental design in a factorial 5 × 3, with four replicates. The analyzed factors of research were doses of cassava wastewater (0; 12.6; 25.2; 50.4; 75.6 m3 ha-1) andassessment periods (20, 40 and 52 days after germination). The following parameters were determined: electric conductivity of soil saturation extract, pH in water, content of available P, content of exchangeable K+, Ca2+, Mg2+ and Na+ of soil, dry mass of leaves and stem. The application of cassava... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Residue; Starch; Nutrients; Organic fertilization; Zea mays. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300458 |
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| Paula Filho,Galdino X; Barreira,Tibério F; Santos,Ricardo HS; Priore,Silvia E; Lucia,Ceres M Della; Pinheiro-Sant’Ana,Helena M. |
| ABSTRACT Wild mustard plant (Sinapis arvensis), Brassicaceae, is a wild vegetable found in forest area, domestic orchards and it is consumed by rural population. This study aimed to evaluate chemical composition (moisture, total dietary fiber, lipids, proteins, ash, carbohydrates and total energetic value), concentration of carotenoids, vitamins (C and E) and minerals (K, Ca, Mg, Cu, Fe, Zn, Mn, Na, Cr, Se and Mo) and the contribution by this vegetable to the recommendations of daily consumption of nutrients for adult individuals. Concentrations of provitamin A (252.21 RAE/100 g), Se (0.04 mg/100 g) and Fe (5.91 mg/100 g) stood out, in which this vegetable was considered as an excellent source for these nutrients. In addition, wild mustard was considered a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sinapis arvensis; Unconventional vegetables; Nutritional value; Nutrients. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000100059 |
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| Guimarães,Rita de Cássia Melo; Cruz,Mara Cristina Pessôa da; Ferreira,Manoel Evaristo; Taniguchi,Carlos Alberto Kenji. |
| The impact of agro-industrial organic wastes in the environment can be reduced when used in agriculture. From the standpoint of soil fertility, residue applications can increase the organic matter content and provide nutrients for plants. This study evaluated the effect of biological sludge from gelatin industry on the chemical properties of two Ultisols (loamy sand and sandy clay) and an Oxisol (clay). The experiment lasted 120 days and was carried out in laboratory in a completely randomized design with factorial arrangement, combining the three soils and six biological sludge rates (0, 100, 200, 300, 400, and 500 m³ ha-1), with three replications. Biological sludge rates of up to 500 m³ ha-1 decreased soil acidity and increased the effective cation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Waste; Nutrients; Soil pH; Effective CEC. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200034 |
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| Arantes,Alessandro de M.; Donato,Sérgio L. R.; Siqueira,Dalmo L. de; Amorim,Edson P.; Rodrigues Filho,Vagner A.. |
| ABSTRACT This study aimed to select regression equations based on the correlation between chlorophyll index and leaf nutrient contents, for real-time prediction of the nutritional status of 'Prata' banana. Six cultivars of 'Prata' banana were used as treatments, with five replicates and four plants per plot, arranged in a completely randomized design. Nutrient levels were evaluated based on laboratorial analysis and chlorophyll indices using a portable chlorophyll meter, in the third leaf from the apex to the base. Data were subjected to analysis of variance, calculating the correlations between leaf nutrient contents and chlorophyll indices, and the regression equations were adjusted to the associations that were significant and with greater magnitude.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Musa spp.; Cultivars; Nutrients; Chlorophyll. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200099 |
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| ANDRADE, L. R. M. de; ICUMA, I. M.; JUNQUEIRA, N. T. V.; KARIA, C. T.; CARVALHO, A. M. de; VIVALDI, L. J.. |
| RESUMO: Este trabalho teve como objetivo avaliar a adequação das espécies leguminosas Crotalaria spectabilis, guandu-anão, feijão-de-porco e amendoim forrageiro ao sistema de plantio em consórcio com maracujá amarelo (Passiflora edulis f. flavicarpa Deg.). À exceção do amendoim forrageiro, cujo cescimento inicial é lento, as espécies apresentaram boa taxa de cobertura do solo nos primeiros 30 dias de seu plantio. As leguminosas influenciaram a densidade da fauna de insetos visitantes, sendo os grupos Diptera e Hymenoptera os mais freqüentes. Nas plantas de maracujá, o nematóide-de-galha Meloidogyne ocorreu principalmente nas parcelas com feijão-de-porco, mas não foram observados efeitos negativos na produção dos frutos. A presença das leguminosas entre as... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Cover plants; Quality.; Adubo Verde; Cobertura do Solo; Leguminosa; Maracujá; Nutrição; Passiflora Edulis; Planta de Cobertura; Qualidade; Solo.; Green manures; Passion fruits; Nutrients; Soil.. |
| Ano: 2002 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/559908 |
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| Zia-Ul-Haq,Muhammad; Ahmad,Shakeel; Bukhari,Shazia Anwer; Amarowicz,Ryszard; Ercisli,Sezai; Jaafar,Hawa ZE. |
| BACKGROUND: In recent years, the desire to adopt a healthy diet has drawn attention to legume seeds and food products derived from them. Mash bean is an important legume crop used in Pakistan however a systematic mapping of the chemical composition of mash bean seeds is lacking. Therefore seeds of four mash bean (Vigna mungo (L.) Hepper, family Leguminoseae) cultivars (NARC-Mash-1, NARC-Mash-2, NARC-Mash-3, NARC-Mash-97) commonly consumed in Pakistan have been analyzed for their chemical composition, antioxidant potential and biological activities like inhibition of formation of advanced glycation end products (AGE) activity and tyrosinase inhibition activity. RESULTS: The investigated cultivars varied in terms of biochemical composition to various... |
| Tipo: Journal article |
Palavras-chave: Nutrients; Antioxidant potential; Mash bean cultivar; Pakistan. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100023 |
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| Gollehon, Noel R.; Caswell, Margriet; Ribaudo, Marc; Kellogg, Robert L.; Lander, Charles; Letson, David. |
| Census of agriculture data were used to estimate manure nutrient production and the capacity of cropland and pastureland to assimilate nutrients. Most farms (78 percent for nitrogen and 69 percent for phosphorus) have adequate land on which it is physically feasible to apply the manure produced onfarm at agronomic rates. (The costs of applying manure at these rates have not been assessed). Even so, manure that is produced on operations that cannot fully apply it to their own land at agronomic rates accounts for 60 percent of the Nation's manure nitrogen and 70 percent of the manure phosphorus. In these cases, most counties with farms that produce "excess" nutrients have adequate crop acres not associated with animal operations, but within the county, on... |
| Tipo: Report |
Palavras-chave: Manure; Nutrients; Manure nutrients; Animal waste; Confined livestock; Confined animal feeding operation; CAFO; Feedlot beef; Dairy cows; Swine; Poultry; Animal unit; Manure nitrogen; Manure phosphorus; Water quality; Livestock Production/Industries. |
| Ano: 2001 |
URL: http://purl.umn.edu/33763 |
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| Mohammed, S.M.; Björk, M.; Björklund, M.; Semesi, A.. |
| The release of inorganic nutrients into the sea by domestic sewage is a major threat to many marine systems. This eutrophication affects coral-reef organisms indirectly by increased growth of microalgae, leading to increased sedimentation, decreased light availibility, rapid growth of opportunistic macroalgae, etc. In this paper, we report a decrease in the cover of important group of coral-reef builders, the coralline algae. This decrease might be caused by the outlets of sewage water from Zanzibar town. Laboratory and field experiments show that both the growth rate and the calcification of these organisms are negatively affected by high phosphate levels, but not by nitrate or ammonia. |
| Tipo: Journal Contribution |
Palavras-chave: Sewage; Algae; Eutrophication; Coral reefs; Nutrients; Environmental degradation; Http://aims.fao.org/aos/agrovoc/c_5274; Http://aims.fao.org/aos/agrovoc/c_34821. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/302 |
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| Lyimo, T.J.; Hamisi, M.I.; Muruke, M.H.S.. |
| We report on the occurrence and diversity of cyanobacteria in intertidal seagrass meadows at Ocean Road and Mjimwema, Dar es Salaam, Tanzania. Nutrients, temperature and salinity were measured as comparative environmental factors. A total of 19 different cyanobacteria taxa were encountered, out of which eight were found exclusively in Mjimwema, four exclusively in Ocean Road and seven were common to both sites. Oscillatoria, Lyngbya and Spirulina were the dominant cyanobacterial genera. Cyanobacterial coverage was higher in Mjimwema (31–100%) than in Ocean Road (0–60%). The levels of nutrients in tidal pool waters at Ocean Road ranged from 0.45–1.03 ìmol NO3 -N/l, 0.19–0.27 ìmol NO2 -N/l and 0.03–0.09 ìmol PO4 -P/l. At Mjimwema the nutrient concentration... |
| Tipo: Journal Contribution |
Palavras-chave: Sea grass; Salinity; Temperature; Bacteria; Nutrients; Salinity; Temperature; Http://aims.fao.org/aos/agrovoc/c_5274; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_7657. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1137 |
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| Registros recuperados: 238 | |
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