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| Registros recuperados: 79 | |
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| MARTHA JÚNIOR, G. B.; TRIVELIN, P. C. O.; CORSI, M.. |
| Avaliou-se o efeito da dose de N-ureia (40, 80 e 120 kg ha -1 de N) e da distância (0,27 e 35 cm) entre dreno (folhas) e fonte (ureia aplicada ao solo) sobre a absorção foliar de amônia por pastagem de Panicum maximum cv. Tanzânia. Adotou-se um delineamento inteiramente casualizado no esquema de parcelas subdivididas, com quatro repetições. Não houve efeito da distância sobre a absorção foliar de amônia (p>0,05), mas esta diminuiu exponencialmente (p<0,05) com o incremento das doses de N-ureia ou da taxa de volatilização de amônia, variando de 2,5 a 16,4% do N volatilizado. |
| Tipo: Separatas |
Palavras-chave: Pastagem tropical; Absorção foliar; Fertilization; Pasture; Foliar absorption.; Adubação; Amônia; Nitrogênio; Panicum Maximum; Solo; Uréia.; Ammonia; Nitrogen; Urea.; Soil. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/567674 |
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| Shih, Jhih-Shyang; Burtraw, Dallas; Palmer, Karen L.; Siikamaki, Juha. |
| The animal husbandry industry is a major emitter of methane, which is an important greenhouse gas. The industry is also a major emitter of ammonia, which is a precursor of fine particulate matter, arguably the number-one environment-related public health threat facing the nation. We present an integrated process model of the engineering economics of technologies to reduce methane and ammonia emissions at dairy operations in California. Three policy options are explored: greenhouse gas offset credits for methane control, particulate matter offset credits for ammonia control, and expanded net metering policies to provide revenue for the sale of electricity generated from captured methane gas. Individually, any of these policies appears to be sufficient to... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Methane; Ammonia; Carbon dioxide; Greenhouse gases; Climate change; Offset; Particulate matter; Net metering; Environmental policy; CAFO; Manure management; Biodigester; Electricity; Global warming; Cost-benefit; Incentive approach; Livestock Production/Industries; Q2; Q4; Q53. |
| Ano: 2006 |
URL: http://purl.umn.edu/10749 |
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| Zhang,Nan; Peng,Huijuan; Li,Yong; Yang,Wenxiu; Zou,Yuneng; Duan,Huiguo. |
| ABSTRACT Anaerobic digestion is important for the management of livestock manure with high ammonia level. Although ammonia effects on anaerobic digestion have been comprehensively studied, the molecular mechanism underlying ammonia inhibition still remains elusive. In this study, based on metatranscriptomic analysis, the transcriptional profile of microbial community in anaerobic digestion under low (1500 mg L-1) and high NH4 + (5000 mg L-1) concentrations, respectively, were revealed. The results showed that high NH4 + concentrations significantly inhibited methane production but facilitated the accumulations of volatile fatty acids. The expression of methanogenic pathway was significantly inhibited by high NH4 + concentration but most of the other... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anaerobic digestion; Ammonia; Pathway; Gene expression; Methanogenesis. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400770 |
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| ABREU, P. G. de; COLDEBELLA, A.; FEDDERN, V.; SANTOS FILHO, J. I. dos. |
| Um dos poluentes aéreos frequentemente encontrados em altas concentrações nos aviários é a amônia a qual é considerada o gás mais prejudicial na produção de aves. Dessa forma, objetivou-se avaliar a concentração de amônia no ar em aviário dark house. Os dados de concentração de amônia no ar foram coletados em 27 pontos no sentido longitudinal do aviário, à altura das aves, no primeiro e nos 21 e 42 dias de vida por seis lotes consecutivos. De acordo com os valores de amônia em cada ponto, foi realizada análise geostatística utilizando o software GS+􀂓. A partir da análise espacial foram confeccionados mapas de isolinhas das medidas de amônia utilizando o software SURFER􀂓. A distribuição de amônia foi heterogênea ao longo do aviário... |
| Tipo: Separatas |
Palavras-chave: Avicultura; Frango de corte; Aviário; Amônia; Aviaries; Broiler chickens; Ammonia. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1013875 |
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| MORASI, I. M.; SOUZA, R. H. A. de; MOLTOCARO, R. C. R.; MAXIMILIANO, V. C. B.; PACKER, A. P.. |
| Resumo: A determinação da amônia volatilizada proveniente da aplicação de fertilizantes nitrogenados vem sendo quantificada por diferentes metodologias. Dentre os métodos baseados na captura da amônia volatilizada do solo, em meio ácido, existe a câmara SALE (Câmara Semiaberta Livre Estática) de baixo custo confeccionada com garrafas PET. Duas formas de dispersão das amostras de ureia sobre o solo foram avaliadas, utilizando um gabarito (0,60 m x 0,15 m) para adubação de 21,5 g de fertilizante por planta e a delimitação da quantidade aplicada a área de abertura da câmara SALE (0,008 m2), utilizando uma estrutura metálica para fixação das câmaras. Para isto, o experimento foi delineado com 3 tratamentos com 5 repetições, um tratamento testemunha sem... |
| Tipo: Separatas |
Palavras-chave: Volatização de amônia; Metodologia de aplicação de fertilizantes; Câmera SALE; Amônia; Fertilizante nitrogenado; Solo; Ammonia; Volatilization; Nitrogen fertilizers. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1036333 |
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| França,Almira Biazon; Morenz,Mirton José Frota; Lopes,Fernando César Ferraz; Madeiro,Afranio Silva; Morenz,Danilo Antônio; Faria,Bruna Moscat de; Cabral,Luciano da Silva; Fonseca,Carlos Elysio Moreira da. |
| The objective of the study was to evaluate the effects of bakery waste inclusion (0; 25; 50; 75 and 100%, DM basis) in proportion to corn meal in the energetic mixture of the concentrate on intake, digestibility, nitrogen balance and ruminal parameters in sheep. Five male lambs with body weight of 30 kg were used in a 5 × 5 Latin square design. Experimental diets were composed of concentrate and Tifton 85 (Cynodon spp.) hay in a 60:40 forage:concentrate ratio. The concentrate rations were composed of corn meal, soybean meal and bakery waste. The bakery waste:corn meal ratio corresponded to the inclusion of, approximately, 0, 7, 14, 22 and 30% (DM basis) of bakery waste in the diet. There was no effect of bakery waste inclusion on the intake and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia; Byproduct; Lamb; PH; Volatile fat acid. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100022 |
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| Siqueira,Félix G de; Martos,Emerson T; Silva,Evânia Geralda da; Silva,Romildo da; Dias,Eustáquio S. |
| The production of compost is one of the most important steps for the cultivation of any species of mushroom. For the Agaricus species, this step is even more complex because it depends on the performance of different microorganisms that act on the substrate, turning it into selective compost that promotes the growth of the fungus to be cultivated. Among the various factors that affect the microbial activity, the initial concentration of nitrogen is considered one of the most important. Due to the lack of conclusive studies about that, the aim of this study was to evaluate the productivity and biological efficiency of Agaricus brasiliensis in compost prepared with different initial concentrations of nitrogen, according to the composting methodology and to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Composting; Mushroom cultivation; Ammonia; Nitrogen concentration. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000200004 |
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| SOUSA, A. A. de; NASCIMENTO, F. P. de; CARVALHO, M. T. de M.; FERREIRA, E. P. de B.; ARAÚJO, W. A. de; SIQUEIRA, M. M. de B.; FREITAS, W. F. de; SILVEIRA, P. M. da; MADARI, B. E.. |
| The objective of the study was to evaluate the effect of biological nitrogen fixation (BNF) and mineral nitrogen (N) on the emission of nitrous oxide (N2O), volatilization of ammonia (NH3) and production of common beans in an integrated crop-livestock system (ICL). The ICL system has about 8 ha, was implemented in 2011/2012 on a clay soil in an experimental area of Embrapa Rice and Beans, in the municipal area of Santo Antônio de Goiás, Goiás State, Central West region of Brazil. The treatments were without application of N (CONTROL); beans inoculated with N-fixing bacteria (Rhizobium sp.) and growth promoters (Azospirillum sp.), without the addition of mineral N (BNF); Mineral N (urea) applied according to standard recommendation (65 N); and mineral N... |
| Tipo: Parte de livro |
Palavras-chave: Integração lavoura-pecuária-floresta; Cerrado; Amônia; Oxido; Fixação de Nitrogênio; Feijão; Phaseolus Vulgaris; Nitrous oxide; Ammonia; Nitrogen fixation; Beans. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134892 |
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| Pires,Aureliano José Vieira; Carvalho,Gleidson Giordano Pinto de; Ribeiro,Leandro Sampaio Oliveira. |
| Chemical treatment of roughage has been the aim of studies for a long time. However, until nowadays, many questions are arisen due to the efficiency of additives used in relation to the variation of answers, either in nutritive value of treated roughage or in performance of animals feed with diet containing such roughage. This revision will approach the main and most used products, which are anhydrous ammonia, urea, sodium hydroxide and calcium oxide. It has been noticed that ammonization (both for anhydrous ammonia and urea) has presented more efficient result in animal's performance when compared with sodium hydroxide or calcium oxide. However, regarding its nutritive value, both sodium hydroxide and calcium oxide have presented a higher efficiency in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia; Calcium oxide; Sodium hydroxide; Urea. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300022 |
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| Mugnier, Chantal; Justou, Carole. |
| The effect of ambient ammonia and molt stage on the physiological response of the blue shrimp Litopenaeus stylirostris was studied. Shrimps were submitted to 54.6 mg l(-1) ammonia-N (1.76 mg l(-1) NH3-N) for 24 h. Only shrimps in stages C, D-0, D-1 and D-2 were used for the analysis. Haemolymph was assayed for osmoregulatory capacity (OC), magnesium ion (Mg ion), total proteins, oxyhaemocyanin, lactate and glucose. Molt stage had an effect on OC, Mg ion and total proteins in control shrimps, and on OC, Mg ion and lactate in treated animals. Ammonia treatment decreased OC and lactate, and increase Mg ion concentration in haemolymph, for all molt stages. It decreased significantly total proteins and oxyhaemocyanin for stages D-1 and D-2, and increased... |
| Tipo: Text |
Palavras-chave: Stress; Peneid shrimp; Molt stage; Litopenaus stylirostris; Haemolymph constituents; Ammonia. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-371.pdf |
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| Registros recuperados: 79 | |
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