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| Registros recuperados: 115 | |
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| Capellesso,Elivane Salete; Scrovonski,Kellin Luana; Zanin,Elisabete Maria; Hepp,Luiz Ubiratan; Bayer,Cimélio; Sausen,Tanise Luisa. |
| ABSTRACT Litter production in forest ecosystems is a major indicator of primary productivity because litter helps incorporate carbon and nutrients from plants into the soil and is directly involved in plant-soil interactions. To our knowledge, few studies have investigated the relationship between species diversity and ecosystem processes in subtropical forest fragments. In this work, we determined forest structural parameters and assessed seasonal leaf litter input, leaf decomposition rate, litter quality and soil characteristics in two subtropical Atlantic Forest fragments. Litter production was greater in the native fragment with the higher species diversity (FN1). The two native fragments (FN1 and FN2) differed in basal area, volume and dominance in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Carbon; Decomposition; Phosphorus; Selection effect. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300329 |
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| Mondino, Eduardo Ariel; UFRRJ; Tavares, Orlando Carlos Huertas; UFRRJ; Ebeling, Adierson Gilvani; UFRRJ; Figueira, Adriana França; UFRRJ; Quintero, Emmeris Ivan; URRJ; Berbara, Ricardo Luis Louro; UFRRJ. |
| Este estudo teve como objetivo avaliar os efeitos de diferentes sistemas agrícolas na comunidade de nematóides de uma área do Sistema Intergrado de Produção Agroecológica (SIPA) de Seropédica, Estado do Rio de Janeiro. Os tratamentos consistiram nos seguintes cultivos: 1- abacaxi; 2-feijão; 3- consórcio milho/feijão; 4- araruta; 5- pasto sujo e 6- capoeira. Os parâmetros avaliados foram: Abundância relativa, Grupos tróficos, índices de Shannon, Dominância, Equitatividade, IM, IM2-5, e a Análise faunística dos nematóides. A abundância relativa dos nematóides flutuou entre 0,02 e 0,59, o número de gêneros variou entre 4 e 14 e a riqueza acumulada foi de 21 gêneros. 79% dos nematóides encontrados foram fitófagos, 14,5% bacteriófagos, 4,7% onívoros-predadores... |
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Palavras-chave: 5.01.00.00-9 Agronomia bioindicadores; Sistema de cultivo; Nematofauna; Carbono bioindicators; Agricultural systems; Nematofauna; Carbon. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/433 |
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| Giostri, André Faé; Universidade Federal do Paraná; Bond, Luiz Fernando Montrucchio; Universidade Federal do Paraná; Motta, Antonio Carlos Vargas; Universidade Federal do Paraná; Pimentel, Ida Chapaval; Universidade Federal do Paraná; Carvalho, Paulo César de Faccio; Universidade Federal do Paraná; Dionízio, Jair Alves; Universidade Federal do Paraná. |
| O resíduo líquido da indústria de enzimas (LWE) é utilizado como fertilizante por muitos agricultores. Para determinar o impacto do uso de LWE no solo, crescimento e nutrição mineral do pasto nativo, foi executado um experimento no município de Fazenda Rio Grande - PR. Os tratamentos foram cinco doses de LWE (0, 45, 90, 135 e 180m3 ha-1), aplicada em Agosto de 2006. Em 2007 uma única taxa de 60 m3 ha-1 foi aplicada. Amostras de solo foram coletadas em quatro profundidades (0-10, 10-20, 20-40 e 40-60 cm) para verificar mudanças nas propriedades químicas do solo. Foram executados cinco cortes para determinar o crescimento e condições nutricionais das plantas. Ocorreu aumento nos teores de Ca, Mg, K, P, soma de bases , saturação de bases, pHs e diminuição do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomia fertilidade do solo e nutrição mineral de plantas soil acidity; Forage; Carbon; Fertilizater fertilidade do solo industrial waste pasture carbon fertilization Fertilidade do solo e nutrição de plantas. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/14570 |
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| Flores, Edgar Dulay; Dela Cruz, Renita S. M.; Antolin, Ma Cecilia R.. |
| Four corn production systems at farmer-level of operation were evaluated. Environmental performance such as energy use, energy efficiency, greenhouse gas emission (GHG) and carbon efficiency were determined. Data were collected from 60 corn producing farmers using survey questionnaires and face to face interview. The input energy to produce an output energy of 69,714.06 and 73,029.60 MJ/ha for sun drying and mechanical drying, respectively, were 22,346.27, 31, 469.75, 22, 399.05 and 31,522.53 MJ/ha for systems 1 (manual harvesting and sun drying), 2 (manual harvesting and mechanical drying), 3 (mechanical harvesting and sun drying) and 4 (mechanical harvesting and mechanical drying), respectively. The highest energy input was observed for system 4... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural and Bioprocess Engineering; Energy and Environmental Engineering corn; Carbon; Energy; Global warming potential; Greenhouse gases. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3568 |
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| Zhang, Peiyao; Riskowski, Gereald. |
| The objective of this research was to find a solution for how to define and determine the decay levels of Pecan logs. Ultimately this information could be used to determine the preferred decay level of Pecan logs for Auricularia auricular-judae (wood ear mushroom) growth. Previous research had found some relationship between densities and C/N ratio of hardwood boreal trees in Canada. In this research, the physical (density, moisture content, penetration depth, etc.) and chemical properties (carbon, nitrogen and C/N ratio) of logs were measured from pecan logs at different levels of decomposition. First, the traditional visual method was used to define the decay level and they were compared to the log physical and chemical properties to find relationships... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Auricularia auricula-judae; Pecan logs; Wood decay level; Carbon; Nitrogen. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5685 |
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| Flores, Edgar Dulay. |
| The energy use and CO2 emissions of eggplant production in the Philippines were analyzed from data collected from 202 eggplant farmers randomly selected from the two major producing provinces of Pangasinan and Quezon, Philippines. Accordingly, the input and output energy of eggplant production were 77,342.09 MJ/ha and 233,905.50 MJ/ha, respectively. Diesel fuel and chemical fertilizer contributed the largest share of energy used in eggplant production. Most of the input energy was utilized in preharvest operations among which the application of fertilizer and water irrigation consumed the largest energy. The energy ratio and energy productivity were 3.02 and 0.51 kg/MJ, respectively. Direct and indirect forms of energy constituted 60.93% and 39.07%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy in Agriculture eggplant; Carbon; Energy; Greenhouse gases; Global warming potentials. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3453 |
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| Vieira,Simone Aparecida; Alves,Luciana Ferreira; Aidar,Marcos; Araújo,Luciana Spinelli; Baker,Tim; Batista,João Luís Ferreira; Campos,Mariana Cruz; Camargo,Plinio Barbosa; Chave,Jerome; Delitti,Welington Braz Carvalho; Higuchi,Niro; Honorio,Euridice; Joly,Carlos Alfredo; Keller,Michael; Martinelli,Luiz Antonio; Mattos,Eduardo Arcoverde de; Metzker,Thiago; Phillips,Oliver; Santos,Flavio Antonio Maes dos; Shimabukuro,Mônica Takako; Silveira,Marcos; Trumbore,Susan Elizabeth. |
| The main objective of this paper is to present and discuss the best methods to estimate live above ground biomass in the Atlantic Forest. The methods presented and conclusions are the products of a workshop entitled "Estimation of Biomass and Carbon Stocks: the Case of Atlantic Rain Forest". Aboveground biomass (AGB) in tropical forests is mainly contained in trees. Tree biomass is a function of wood volume, obtained from the diameter and height, architecture and wood density (dry weight per unit volume of fresh wood). It can be quantified by the direct (destructive) or indirect method where the biomass quantification is estimated using mathematical models. The allometric model can be site specific when elaborated to a particular ecosystem or general that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Above-ground biomass; Allometric model; Carbon; Mata Atlântica. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000200001 |
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| Carmo,Janaina Braga; Urzedo,Danilo Ignácio de; Ferreira Filho,Pedro José; Pereira,Elisabete Alves; Pitombo,Leonardo Machado. |
| This study aimed to quantify the carbon dioxide emissions from an Oxisol under degraded pasture located in Sorocaba, São Paulo State, Brazil. The treatments were: sewage sludge (LE), sewage sludge compost (CLE), mineral fertilizer (AM) and no fertilization (T0). The experiment was conducted in a completely randomized block design with analysis of the effect of the four treatments (CLE, LE, and AM T0) with four replications. The application of sewage sludge, sewage sludge compost, mineral fertilizer and no fertilizer was statistically significant for the variables of height increase and stem height of Guanandi seedlings (Calophyllum brasiliense Cambessèdes - Calophyllaceae). Treatments showed significant differences in terms of CO2 emissions from soil. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GHG; Organic waste; Carbon. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000300012 |
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| Fonseca,Adriel Ferreira da; Herpin,Uwe; Dias,Carlos Tadeu dos Santos; Melfi,Adolpho José. |
| In this study, an experiment under controlled conditions was carried out to determine the effects of secondary-treated sewage effluent (STSE) application on soil nitrogen concentrations (mineral and total), total carbon and soil pH. The soil and STSE used were collected at Lins, São Paulo State, Brazil. A completely randomized design was used, in completed factorial 4x11 (weekly application rates of 0, 100, 150 and 200 mL STSE per kg soil; and, eleven soil incubation periods from 0 to 10 weeks) with four replicates. The STSE was applied simulating common surface irrigation. Seven days after each incubation period, ammonium and nitrate contents were determined. Additionally, pH and total carbon and nitrogen contents were measured in the soil after 10 weeks.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Treated sewage effluent; Nitrogen; Carbon; Tropical soil. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000500001 |
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| Oliveira,I.C.; Brenner,E.; Chiu,J.; Hsieh,M.-H.; Kouranov,A.; Lam,H.-M.; Shin,M.J.; Coruzzi,G.. |
| We are using molecular, biochemical, and genetic approaches to study the structural and regulatory genes controlling the assimilation of inorganic nitrogen into the amino acids glutamine, glutamate, aspartate and asparagine. These amino acids serve as the principal nitrogen-transport amino acids in most crop and higher plants including Arabidopsis thaliana. We have begun to investigate the regulatory mechanisms controlling nitrogen assimilation into these amino acids in plants using molecular and genetic approaches in Arabidopsis. The synthesis of the amide amino acids glutamine and asparagine is subject to tight regulation in response to environmental factors such as light and to metabolic factors such as sucrose and amino acids. For instance, light... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acids; Carbon; Ammonium; Nitrogen assimilation; Gene expression; Arabidopsis thaliana. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000500003 |
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| Tanseer,Sundas; Anjum,Tehmina. |
| Most of the studies regarding cyclosporin 'A' production through fungi concentrate around Tolypocladium inflatum. This is mainly due to lower reported production of this drug in other fungi. The present study was therefore conducted to explore indigenous isolates of Aspergillus terreus for synthesis of this drug and defining a production medium for obtaining high yield of cyclosporin 'A'. For this purpose carbon and nitrogen sources were optimized for the selected best strain of A. terreus. Overall results depicted that the best cyclosporin 'A' yield from selected Aspergillus terreus (FCBP58) could be obtained by using production medium containing glucose 10% as carbon source and peptone 0.5% as nitrogen source. This modification in production medium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus terreus; Cyclosporin 'A'; Carbon; Nitrogen. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400019 |
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| Duarte,Felipe Cimino; Cardoso,Maria das Graças; Pinheiro,Ana Carla Marques; Santiago,Wilder Douglas; Carvalho,Leonardo Luna de. |
| Sugarcane spirit is a drink considered as a national symbol of Brazil. It is produced by large producers and by about 30 thousand small and medium home-distilling producers dispersed throughout the country. The copper originating from the home-distillers can become a serious problem since at high concentrations in beverages it may cause serious human health problems. Therefore, the objective of this study was to investigate the influence of the activated carbon used in commercial filters on the physicochemical and sensory characteristics of aged sugarcane spirit. Analyses of copper, dry extract, alcoholic degree, higher alcohols, volatile acids, aldehydes, esters, furfural, and methanol were performed. The sensory evaluation was performed by seven selected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sugarcane spirit; Filtering; Carbon; Sensory and physicochemical analysis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000300008 |
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| Registros recuperados: 115 | |
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