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Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 8
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Adubos nitrogenados aplicados em capim - Coastcross: recuperação aparente do nitrogênio. Repositório Alice
PRIMAVESI, A. C.; PRIMAVESI, O.; CORRÊA, L. de A.; CANTARELLA, H.; SILVA, A. G..
2002
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Cynodon dactylon; Dose de nitrogênio; Nitrato de amônio; Nitrogênio absorvido; Produção de biomassa; Uréia; Ammonium nitrate; Biomass production; Nitrogen rates; Nitrogen uptake; Urea.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/46134
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Assimilacao do nitrogenio pelas plantas de panicum maximum, cv. Vencedor, submetidas a diferentes proporcoes NH4+/NO3-. Infoteca-e
ANDRADE, S. R. M.; SANT'ANNA, R.; MOSQUIM, P. R.; CAMBRAIA, J..
Visando a elucidar alguns aspectos do metabolismo do nitrogenio por plantas de Panicum maximum, estudaram-se os efeitos da proporcao NH +4/NO-3 na variacao do pH das solucoes nutritivas de tratamento, no acumulo de materia seca e na distribuicaoo de nitrogenio na planta. Para tal, as plantas foram cultivadas em camara de crescimento na solucao nutritiva (pH 5,5) completa, contendo nitrogenio somente na forma nitrica. Aos 25 dias depois da germinacao, as plantas foram submetidas a 100 ppm de nitrogenio fornecido nas formas nitrica e amoniacal ou amonical, nas seguintes proporcoes 0/100,25/75,50/50,75/25 e 100/0, durante quatro dias. O pH das solucoes nutritivas foi medido e corrigido diariamente. Os resultados demostraram que o pH aumentou na presenca...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Cerrado; Nitrogenio; Capim coloniao; Panicum maximum; Nitrato; Amonio; Fisiologia vegetal; Absorcao de nitrogenio; Nitrogen uptake; Ammonium; Nitrate; Plant physiology; Fisiologia vegetal: Nutricao mineral.
Ano: 2001 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/567073
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Efficiency of organic nitrogen fertilisation of potato in Northeast Portugal IPB - Escola Superior Agrária
Rodrigues, M.A.; Coutinho, João; Martins, F..
The study was conducted over a 4 year period with the purpose of measuring N mineralization using an in situ incubation technique, following the application of farmyard manure, poultry manure or municipal solid waste. The results varied from –10 % (net immobilization) to +28 % (net mineralization) in relation to the total organic N applied. N fluxes were assessed through plant N analysis during the growing season and through determination of potato tuber dry weight (TDW), N uptake by tubers and the apparent N recovery (ANR) of added N at harvest. Organic material applications slightly increased TDW above the control treatment (9 to 25%), although the results indicate a shortage of N, where no N was added to the crop. The effect of organic fertilization on...
Tipo: Article Palavras-chave: Farmyard manure; Municipal solid waste; Poultry manure; Nitrogen mineralization; Nitrogen uptake; Solanum tuberosum L..
Ano: 2001 URL: http://hdl.handle.net/10198/2205
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Fertilizer trial on corn and sorghum Thai Agricultural
Ring Meesawat; Dumri Thawornmas; Tianchai Suvanvej; Pradit Boonampol; Mongkol Panichkul.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizer trials; Nitrogen fertilizers; Rock phosphate; Livestock manures; Soil chemicophysical properties; Nitrogen uptake; Soil types; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบปุ๋ย.
Ano: 1977 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3926
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Heterotrophic Bacteria Show Weak Competition for Nitrogen in Mediterranean Coastal Waters (Thau Lagoon) in Autumn ArchiMer
Trottet, Aurore; Leboulanger, Christophe; Vidussi, Francesca; Pete, Romain; Bouvy, Marc; Fouilland, Eric.
The importance of heterotrophic bacteria relative to phytoplankton in the uptake of ammonium and nitrate was studied in Mediterranean coastal waters (Thau Lagoon) during autumn, when the Mediterranean Sea received the greatest allochthonous nutrient loads. Specific inhibitors and size-fractionation methods were used in combination with isotopic N-15 tracers. NO3 (-) and NH4 (+) uptake was dominated by phytoplankton (60 % on average) during the study period, which included a flood event. Despite lower biomass specific NH4 (+) and NO3 uptake rates, free-living heterotrophic bacteria contributed significantly (> 30 %) to total microbial NH4 (+) and NO3 (-) uptake rates in low chlorophyll waters. Under these conditions, heterotrophic bacteria may be...
Tipo: Text Palavras-chave: Bacteria; Phytoplankton; Inhibitors; Size fractionation; Nitrogen uptake; Dissolved inorganic nitrogen.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00314/42497/41907.pdf
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Integrated research program on soil and fertilizer requirement for increasing yields of corn and sorghum Thai Agricultural
12 ill., 17 tables
Palavras-chave: Corn; Maize; Sorghum; Legumes; Fertilizers; Nitrogen fertilizers; Phosphate fertilizers; Rock phosphate; Varieties; Intercropping; Yields; Nitrogen uptake; Soil surveys; ข้าวโพด; ข้าวฟ่าง; ปุ๋ย; ความอุดมสมบูรณ์ของดิน; การเพาะปลูก; การจัดการดิน.
Ano: 1974 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3798
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Nutritional value of dual-purpose wheat genotypes pastures under grazing by dairy cows Animal Sciences
Quatrin, Mauricio Pase; Olivo, Clair Jorge; Bratz, Vinicius Felipe; Alessio, Vinicius; Santos, Fabiene Tomazetti dos; Aguirre, Priscila Flores.
In the south of Brazil, one of the major limitations to milk production is the low forage availability during autumn and early winter. The use of dual-purpose wheat genotypes is one alternative to minimize the impact of low forage availability in addition to produce grains. Therefore, this study aimed to evaluate the nutritional value of two dual-purpose wheat genotypes (BRS Tarumã and BRS Umbu). Structural composition and forage nitrogen uptake were evaluated. The nutritional value of the forage was analyzed for mineral matter (MM), organic matter (OM), neutral detergent fiber (NDF), crude protein (CP), total digestible nutrients (TDN), in situ organic matter digestibility (ISOMD) and in situ dry matter digestibility (ISDMD). Differences in NDF (49.03 vs....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Winter cereal; Digestibility; Nitrogen uptake; Crude protein; Triticum aestivum..
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/34420
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Plankton community composition in relation to availability and uptake of oxidized and reduced nitrogen ArchiMer
Berg, Gm; Balode, M; Purina, I; Bekere, S; Bechemin, Christian; Maestrini, Serge.
Trends in nitrogen utilization, determined with N-15-labeled substrates, were related to blooms of distinct phytoplankton groups in the Gulf of Riga, Baltic Sea, during May, June and July 1999. The dominant phytoplankton groups included diatoms, cryptophytes, dinoflagellates, and filamentous cyanobacteria. As the water column became progressively more stratified over the growing season, diatoms comprised a smaller proportion of the total phytoplankton assemblage and almost disappeared by late summer. Their disappearance correlated with undetectable surface-water nitrate concentrations and low nitrate uptake rates (5 to 8% of total nitrogen uptake). Diatoms were the only phytoplankton group significantly associated with the uptake of oxidized nitrogen...
Tipo: Text Palavras-chave: Nitrogen uptake; DON; Nitrate; Diatoms; Cyanobacteria; Cryptophytes; Baltic Sea; Gulf of Riga.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00000/10207/7595.pdf
Registros recuperados: 8
Primeira ... 1 ... Última
 

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