Ammonia Nitrogen
Mostrando 13-24 de 649 artigos, teses e dissertações.
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13. Sistema integrado com microalgas e wetland construído de fluxo vertical no tratamento de efluentes urbanos
RESUMO O sistema integrado com microalgas (MA) e wetland construído de fluxo vertical (wetland construído pós-microalgas - WCPMA) foi aplicado para a realização de ensaios de tratamento de efluentes no campus da Universidade de Santa Cruz do Sul, no Rio Grande do Sul (UNISC-RS). Águas negras e amarelas foram alimentadas para esse sistema em regime de b
Eng. Sanit. Ambient.. Publicado em: 30/05/2019
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14. Ammonia Volatilization from Soil-Applied Organic Fertilizers
ABSTRACT: A reliable quantification of nitrogen (N) losses by ammonia (NH3) volatilization can contribute to identifying optimized strategies of fertilizer management. The objective of this study was to quantify ammonia volatilization from several organic N sources incorporated into or applied onto the soil surface. Two cultivation areas, under snap bean and
Rev. Bras. Ciênc. Solo. Publicado em: 27/05/2019
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15. Evaluation of water resource preservation areas in the Hydrographical Basin of Andreas Stream, RS, Brazil, using environmental monitoring programs
Resumo A presente pesquisa objetivou avaliar a efetividade da implantação de áreas de preservação de recursos hídricos na Bacia Hidrográfica do Arroio Andreas, município de Vera Cruz, RS, estabelecida através do Pagamento por Serviços Ambientais (PSA), utilizando um programa de monitoramento ambiental para avaliar variáveis físicas, químicas e m
Rev. Ambient. Água. Publicado em: 11/03/2019
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16. Fermentative losses and chemical composition of elephant grass silage added with castor bean hull
RESUMO A fermentação e a composição química da silagem de capim-elefante foram avaliadas com 0; 10; 20 e 30% de casca de mamona com base na matéria natural.O delineamento experimental foi inteiramente casualizado com cinco repetições. Os silos foram pesados durante a confecção dos mesmos, sendo novamente pesados antes e após a abertura, depois de
Rev. Ciênc. Agron.. Publicado em: 2019-03
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17. Quality of sorghum silage with leucaena
ASTRACT. This study evaluated the effect of increasing levels of leucaena forage in sorghum: forage. In addition to pure sorghum, it was evaluated different levels of inclusion of leucaena (15, 30 and 50%) at the time of ensiling. Forage was ensiled in PVC tubes (100 mm diameter, 500 mm length) under the density of 500 - 600 kg m-3, a total of 20 silos were
Acta Sci., Anim. Sci.. Publicado em: 07/01/2019
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18. Crude glycerin combined with food additives in feeding beef cattle
ABSTRACT The objective of this study was to evaluate the effects of adding crude glycerin with food additives (sodium monensin or essential oils) to the diets of beef cattle on feed intake, ruminal parameters, in vitro digestibility, and production of greenhouse gases. Five ruminally cannulated Nellore steers were randomly assigned in a 5×5 Latin square des
R. Bras. Zootec.. Publicado em: 29/11/2018
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19. The rates and players of denitrification, dissimilatory nitrate reduction to ammonia (DNRA) and anaerobic ammonia oxidation (anammox) in mangrove soils
Abstract Mangroves are ecosystems located in the transition zone between land and sea, characterized by periodic flooding that confer to its unique characteristics. Little is known about the transformation of nutrients that occur during the organic matter degradation in this system. In this study, we monitor the nitrogen transformations in soils from three m
An. Acad. Bras. Ciênc.. Publicado em: 25/10/2018
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20. Isolation and prospection of diazotrophic rhizobacteria associated with sugarcane under organic management
Abstract Microorganisms associated with organic management are essential in nutrient transformation and release for plant use. The present study aimed to isolate, identify and characterize plant growth promoting diazotrophic rhizobacteria associated with sugarcane under organic management. Rhizospheres of organic sugarcane varieties IAC 911099 and CTC4 were
An. Acad. Bras. Ciênc.. Publicado em: 25/10/2018
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21. Corn grain yield and 15N-fertilizer recovery as a function of urea sidedress timing
Abstract Best fertilizer management practices such as adopting the right N sidedress timing can reduce N losses by volatilization, thus, raising N-fertilizer recovery and grain yield. To evaluate ammonia (N-NH3 ) losses, N-fertilizer recovery and grain yield as a function of urea sidedress timing in corn, a field study was conducted during the 2011-2012 and
An. Acad. Bras. Ciênc.. Publicado em: 03/09/2018
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22. Mass Spectrometry Study of Ammonia Formed During Plasma Nitrocarburizing and Nitriding Processes
In this work, we used mass spectrometry to investigate ammonia (NH3) formed during the nitrocarburizing and nitriding processes of α-Fe sintered and low alloy steel by using d.c. glow discharges in different N2/H2/CH4 gas concentration mixtures. Experiments were conducted using two different configurations: one to collect and analyze species probed primaril
Mat. Res.. Publicado em: 16/07/2018
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23. Application of submerged membrane bioreactor technology for the treatment of high strength dairy wastewater
Abstract In this study, an aerobic submerged membrane bioreactor (sMBR) was used for the treatment of dairy wastewater at 15 h of hydraulic retention time (HRT) and 40 d of sludge retention time (SRT) with constant permeate flux (9.5 L.m-3.d-1(LMH)). The COD, ammonia-nitrogen (NH3-N) and orthophosphate (PO4-P) removal efficiencies were 98.2%, 95.4% and 88.9%
Braz. J. Chem. Eng.. Publicado em: 2018-01
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24. Can nearby eutrophic reservoirs sustain a differentiated biodiversity of planktonic microcrustaceans in a tropical semiarid basin?
ABSTRACT This paper aims to compare alpha and beta diversities of planktonic microcrustaceans from three reservoirs located nearby in a tropical semiarid basin. Our hypothesis was that alpha and beta diversities of the community are different, although the ecosystems are located close to each other. We carried out two sampling campaigns: dry and rainy season
An. Acad. Bras. Ciênc.. Publicado em: 2017-12