Results 11 to 20 of about 264,167 (309)

Influence of microbial activity on plant–microbial competition for organic and inorganic nitrogen

Plant and Soil, 2006
To investigate how the level of microbial activity in grassland soils affects plant-microbial competition for different nitrogen (N) forms, we established microcosms consisting of a natural soil community and a seedling of one of two co-existing grass species, Anthoxanthum odoratum or Festuca rubra.
Dunn, Robert M., Mikola, Juha, Bol, Roland, Bardgett, Richard D.   +3 more
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Biomassa microbiana do solo em sistema de integração lavoura-pecuária em plantio direto, submetido a intensidades de pastejo Soil microbial biomass in a no-tillage integrated crop-livestock system under different grazing intensities

Revista Brasileira de Ciência do Solo, 2010
Em sistemas de integração lavoura-pecuária, boa parte do suprimento de nutrientes para as pastagens provém das excreções dos animais, na forma de esterco e de urina, o que resulta em estímulo à atividade e ao acúmulo de nutrientes nas suas células.
Edicarlos Damacena de Souza, Sérgio Ely Valadão Gigante de Andrade Costa, Ibanor Anghinoni, Christina Venzke Simões de Lima, Paulo César de Faccio Carvalho, Amanda Posselt Martins   +5 more
doaj   +1 more source

Microbial nitrogen cycling on the Greenland Ice Sheet [PDF]

, 2012
Nitrogen inputs and microbial nitrogen cycling were investigated along a 79 km transect into the Greenland Ice Sheet (GrIS) during the main ablation season in summer 2010. The depletion of dissolved nitrate and production of ammonium (relative to icemelt)
J. Telling, C. Bellas, Wadham, J.L., Hodson, A, I. Nias, Wadham, Jemma L, Tranter, Martyn, J. Cook, M. Stibal, Telling, J., Bellas, Christopher M, A. Hodson, A. M. Anesio, Hodson, A., Cook, J, Sole, A, G. Lis, Nias, Isabel, Tranter, M., Lis, G., Stibal, M, P. Nienow, Anesio, A.M., Stibal, Marek, Nienow, P, Anesio, A. M., Cook, J., Tranter, M, Anesio, Alexandre M, Stibal, M., Telling, J, Bellas, C, Bellas, C., Wadham, JL, Telling, Jon P, Anesio, AM, M. Tranter, Lis, G, Sole, A., Cook, Joe, J. L. Wadham, A. Sole, Wadham, J. L., Nias, I, Nias, I., Nienow, P.   +45 more
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The microbial nitrogen cycle [PDF]

Environmental Microbiology, 2008
Summary This special issue highlights several recent discoveries in the microbial nitrogen cycle including the diversity of nitrogen‐fixing bacteria in special habitats, distribution and contribution of aerobic ammonium oxidation by bacteria and crenarchaea in various aquatic and terrestrial ecosystems, regulation of metabolism in ...
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Sources of nitrogen for winter wheat in organic cropping systems [PDF]

, 2013
In organic cropping systems, legumes, cover crops, residue incorporation, and manure application are used to maintain soil fertility, but the contributions of these management practices to soil nitrogen (N) supply remain obscure.
Christensen, B.T., Søren O. Petersen, Olesen, Jørgen E., Per Schjønning, Jørgen E. Olesen, Petersen, Søren O., Schjønning, P., Christensen, S., Søren Christensen, Bent T. Christensen   +9 more
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Níveis de uréia na ração de novilhos de quatro grupos genéticos: estimativa da produção de proteína microbiana por meio dos derivados de purinas na urina utilizando duas metodologias de coleta Urea levels in diet for steers of four genetic groups: microbial protein production by the urinary purine derivatives, using two collection methodologies

Revista Brasileira de Zootecnia, 2008
Objetivou-se avaliar o efeito de quatro níveis de uréia na ração: 0; 0,65; 1,3 e 1,95% na matéria seca (MS), sobre a estimativa da produção de proteína microbiana por meio dos derivados de purinas na urina, em duas metodologias de coleta em novilhos de ...
Luciana Navajas Rennó, Sebastião de Campos Valadares Filho, Rilene Ferreira Diniz Valadares, Mário Fonseca Paulino, Francisco Palma Rennó, Polyana Albino Silva   +5 more
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Casca de café em dietas para vacas em lactação: balanço de compostos nitrogenados e síntese de proteína microbiana Coffee hulls in diet of lactating dairy cows: nitrogen balance and microbial protein synthesis

Revista Brasileira de Zootecnia, 2006
Avaliaram-se o balanço de compostos nitrogenados e a síntese de proteína microbiana (PBmic) de vacas alimentadas com dietas contendo diferentes níveis de casca de café (0,0; 8,75; 17,5 e 26,25% da MS, correspondentes a 0,0; 3,5; 7,0 e 10,5% de casca de ...
Alexandre Lima de Souza, Rasmo Garcia, Rilene Ferreira Diniz Valadares, Mara Lúcia Albuquerque Pereira, Luciano da Silva Cabral, Sebastião de Campos Valadares Filho   +5 more
doaj   +1 more source

Efficacy of Nitrogen-fixing Bacteria Combined with Different Nitrogen Fertilizers in Improving Enzymatic Activity and Nitrogen in Reclaimed Soil

Guan'gai paishui xuebao, 2022
【Objective】 Reclaimed soils are usually poor in nutrients and the aim of this paper is to investigate the efficacy of nitrogen-fixing bacteria combined with different nitrogen fertilizations in improving fertility of reclaimed soils.
WANG Shuaibing, MENG Huisheng, WU Xin, ZHANG Jie, HAO Xianjun, HONG Jianping, JIAO Jincheng   +6 more
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Soil microbial biomass in organic farming system. [PDF]

, 2010
Agricultural production systems have to combine management practices in order to sustain soil's profitability and quality. Organic farming is gaining worldwide acceptance and has been expanding at an annual rate of 20% in the last decade, accounting for ...
Araújo, Ademir Sérgio Ferreira de, Wanderley José de Melo, de Araújo, Ademir Sérgio Ferreira, Melo, Wanderley José de [UNESP], de Melo, Wanderley José [UNESP], Melo, Wanderley José de, Ademir Sérgio Ferreira de Araújo   +6 more
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Microbially facilitated nitrogen cycling in tropical corals [PDF]

The ISME Journal, 2021
Abstract Tropical scleractinian corals support a diverse assemblage of microbial symbionts. This ‘microbiome’ possesses the requisite functional diversity to conduct a range of nitrogen (N) transformations including denitrification, nitrification, nitrogen fixation and dissimilatory nitrate reduction to ammonium (DNRA).
Thomas D Glaze, Dirk V Erler, Henri M P Siljanen   +2 more
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