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| Registros recuperados: 38 | |
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| Varjabedian,Roberto; Pagano,Sergio Nereu. |
| A produção de folhedo e a taxa de decomposição de folhedo (k) foram estimadas, no período de 2.8.85 a 10.8.86, numa área de 1 ha de mata atlântica de encosta (60º de inclinação e altitude de 140m), no município do Guarujá (Lat. S 24º16'; Long. W 46º19'), Estado de São Paulo. A queda pluviométrica anual média é de 2050 mm e não há estação seca definida. O solo é argilo-arenoso e ácido, com pH variando entre 3 e 4. A produção anual de folhedo foi de 7925 kg/ha. A fração folhas contribuiu com 5040 kg/ha seguida pelas frações ramos (1950 kg/ha), flores (491 kg/ha), frutos (222 kg/ha) e material de origem animal (222 kg/ha). A produção de folhedo e das frações componentes foi contínua durante todo o ano. Os valores mensais de produção não revelaram nenhum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Litterfall; Decomposition; Coastal Rain Forest. |
| Ano: 1987 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061987000300023 |
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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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| Sausen,Tanise Luisa; Schaefer,Guilherme Frederico de Paula; Tomazi,Michely; Santos,Lívia Scheunemann dos; Bayer,Cimélio; Rosa,Luís Mauro Gonçalves. |
| Soil carbon accumulation is largely dependent on net primary productivity. To our knowledge, there have been no studies investigating the dynamics of carbon accumulation in weathered subtropical soils, especially in managed eucalyptus plantations. We quantified the seasonal input of leaf litter, the leaf decomposition rate and soil carbon stocks in an commercial plantation of Eucalyptus saligna Labill. in southern Brazil. Our goal was to evaluate, through multiple linear regression, the influence that certain chemical characteristics of litter, as well as chemical and physical characteristics of soil, have on carbon accumulation in soil organic matter fractions. Variables related to the chemical composition of litter were not associated with the soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weathered soils; Decomposition; Soil organic matter fractions; Litter input. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000200013 |
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| Cunha,Gláucio de Mello; Gama-Rodrigues,Antonio Carlos. |
| In this study, we evaluate litter biomass and nutrient inputs, as well as nutrient use efficiency (NUE), in two fragments of dense montane rain forest within the Atlantic Forest Biome in the northern region of the state of Rio de Janeiro, Brazil. The total annual average litter production for the two fragments (designated M1 and M2) was 7.72 and 7.56 t ha−¹ year−¹, respectively. The annual nutrient return rate was 146.67, 4.84, 21.41, 64.93, and 17.25 kg ha−¹ year−¹ for N, P, K, Ca, and Mg, respectively. No differences in NUE were observed between the studied fragments, except for that of P. The average NUE for N, P, K, Ca, and Mg, respectively, was 51, 1426, 367, 111, and 428 in fragment M1, compared with 51, 1890, 360, 126, and 472 in fragment M2. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Decomposition; Forest fragment; Litter; Nutrient input; Nutrient use efficiency. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400015 |
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| Teixeira, Cícero Monti; EPAMIG; Carvalho, Gabriel José de; UFLA; Andrade, Messias José Bastos de; UFLA; Silva, Carlos Alberto; UFLA; Pereira, Janser Moura; UFU. |
| O objetivo foi avaliar a produção de fitomassa, o acúmulo e liberação de macronutrientes, e a decomposição das palhadas de milheto (Pennisetum typhoides (Burm.) Stapf) solteiro e consorciado com crotalária (Crotalaria juncea), sob a cultura do feijoeiro. O delineamento foi o de blocos casualizados, com quatro repetições, em esquema de parcelas subdivididas. As parcelas foram constituídas pelas duas palhadas; as subparcelas, pelas épocas de avaliação, ao longo do cultivo do feijoeiro (0, 8, 16, 24, 40, 56 e 72 dias após a semeadura). Os resíduos coletados foram secos em estufa de circulação forçada de ar, a 65ºC, até atingirem massa constante, para a determinação da matéria seca remanescente. Posteriormente, foram moídos e encaminhados para laboratório,... |
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Palavras-chave: 5.01.03.04-0 Produção de Mudas ciclagem de nutrientes; Litter-bags; Decomposição; Modelos não-lineares; Consórcio gramínea x leguminosa. 5.01.01.03-0 nutrient cycling; Litter bags; Decomposition; Non-linear models; Grass x leguminous intercropping.. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1356 |
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| Abreu, Paulo Giovanni de; Embrapa Suínos e Aves; Paiva, Doralice Pedroso de; Embrapa Suínos e Aves; Abreu, Valeria Maria Nascimento; Embrapa Suínos e Aves; Coldebella, Arlei; Embrapa Suínos e Aves; Cestonaro, Taiana; Universidade do Contestado -UnC. |
| Avaliou-se a atuação da casca de arroz e da palhada de soja como substrato para compostagem de carcaça de frangos de corte, observando a degradação dos dois substratos e das carcaças pelo monitoramento da temperatura, peso das carcaças e dos substratos e análise físico-química do produto final. As câmaras foram montadas com carcaças de 10 aves recém abatidas, com quatro repetições no tempo. Instalou-se em cada câmara um termopar para registro da temperatura. O substrato e as carcaças foram pesadas separadamente, no início, aos 15 e aos 30 dias de compostagem. Ao final de cada período, foram realizadas análises físico-química de amostras de cada câmara, avaliando-se o pH e os teores de matéria seca, cinzas, P, N, K, Cu, Zn, Mn, Fe e carbono orgânico.... |
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Palavras-chave: Composição físico-química; Decomposição; Pilhas de compostagem physiochemical composition; Decomposition; Composting piles. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10824 |
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| Marques,Márcia S.; Sá,Nadja M.; Scotti,María R.. |
| Leguminous trees are being planted in order to establish restoration units in the Brazilian Atlantic forest ecosystem. The success of the establishment depends on the growth, productivity of plants and litter decomposition rates. The objective of this study was to investigate the decomposition of araribá (Centrolobium tomentosum Guill. Ex Benth) leaves, at two sites. Site 1 was an experimental plantation of the native species C. tomentosum, which was inoculated with rhizobia plus mycorrhizal fungi, and Site 2 was a eucalyptus (Eucalyptus grandis W. Hill ex Maiden) forest. The leaf litter of C. tomentosum was incubated for 120, 240 and 360 days in both sites. The decomposition rate and dynamic of mineralization of the organic matter and the nutrients K, Mg,... |
| Tipo: Journal article |
Palavras-chave: Decomposition; Eucalyptus sp.; Microbial colonization; Tropical forest; Soil fertility. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072003000100008 |
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| Navarro,Fernanda Keley Silva Pereira; Rezende,Renan de Souza; Gonçalves Júnior,José Francisco. |
| The role of the invertebrate shredders in leaf decomposition process in tropical lotic ecosystems has been explored only recently. In addition to the influence of the quality of litter and the temperature, the risk of predation generally results in changes on the survival and behavior of invertebrate shredders. The aim of this study was to observe the responses of the invertebrate shredders to different species of leaf litters (Experiment 1: Talauma ovata and Inga laurina ; Experiment 2: Talauma ovata, Inga laurina and Richeria grandis ) under gradual temperature rise (24 °C, 26 °C, 28 °C, 30 °C, 32 °C), in the presence (Experiment 2) and absence (Experiment1) of fish (Astyanax sp.) carcasses, as well as to observe the possible consequences of the leaf... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding activity; Global warming; Decomposition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400028 |
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| Brum,Paulo R.; Farjalla,Vinicius F.; Gonçalves Jr.,José F.; Santos,Anderson M. dos; Pôrto,Maurício T.; Vieira,Elisa D. R.; Ferreira,Flávia M.; Bianchini Jr.,Irineu. |
| In this work, we describe qualitative and quantitative aspects of the cycling of detritus of aquatic macrophytes and carbohydrates in two coastal lagoons of the northeastern part of the State of Rio de Janeiro. Samples of water of the Imboassica and Cabiúnas lagoons were enriched with sucrose. Samples of water of the Cabiúnas lagoon were also utilized to arrange mineralization chambers with fragments of three species of aquatic macrophytes found in these lagoons (Typha domingensis, Potamogeton stenostachys and Nymphaea ampla). Following that, the bottles were aerated and incubated (in the laboratory) for a period of 8 days. The concentrations of dissolved oxygen, the pH, the electrical conductivity and the temperature were daily measured. The anaerobic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Decomposition; Aerobic mineralization; Dissolved oxygen; Coastal lagoons; Aquatic macrophytes. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000400008 |
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| PAGIORO,T. A.; THOMAZ,S. M.. |
| Leaf packs of the aquatic macrophyte Eichhornia azurea were used to experimentally evaluate changes in mass, carbon, nitrogen, and phosphorus concentrations, and C:N ratios during initial stages of decomposition in two different environments, the Paraná River and Garças Lake. Analysis of weight loss showed relatively slow decomposition rates in both environments (0.0047 d-1 and 0.0048 d-1 respectively). Over a 45-day period we observed significant changes (p < 0.05) in concentrations of carbon, nitrogen, and phosphorus, but only carbon differed between the environments (F = 10.479; p = 0.03). Therefore we concluded that detritus behaved similarly during decomposition, since intrinsic characteristics of the environments affected only the carbon... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eichhornia azurea; Decomposition; Floodplain; Paraná river. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000400007 |
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| Guerrero Ortíz, Pilar Lourdes. |
| Con la finalidad de estudiar los mejoradores orgánicos de lupinus, se estableció una fase en laboratorio, en el cual se incubó durante 58 días en condiciones controladas de humedad y temperatura, se realizaron mezclas de suelo tipo franco arenoso en combinación con mejoradores orgánicos de Lupinus montanus Kunth en verde (Av), compost maduro (Cm) y vermicompost maduro (Vc). Los resultados obtenidos indicaron que Av presentó un mayor desprendimiento de CO2, mientras que el Cm y el Vc presentaron menor acción de la biomasa microbiana, esto se puede atribuir a que los mejoradores orgánicos presentaban distintas etapas de descomposición. En la fase campo, se estableció el experimento en San Pablo Ixayoc; en un primer tratamiento se incorporó 25.22 kg de... |
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Palavras-chave: Respiración; Madurez; Descomposición; Edafología; Maestría; Breathing; Maturity; Decomposition. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1766 |
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| Carmona,Martín R; Aguilera,María; Pérez,Cecilia A.; Serey,Italo. |
| El mantillo del suelo (horizontes Oi y Oe) de ecosistemas boscosos es utilizado como hábitat, fuente de nutrientes y energía para una gran diversidad de organismos. Ocurre, en consecuencia, un flujo de carbono (C) desde el detritus debido a la producción de CO2 por respiración de la biota. En este trabajo se midió y comparó la actividad respiratoria en condiciones de laboratorio de muestras de mantillo, colectadas en tres tipos de bosques del centro y sur de Chile: bosque Nordpatagónico (Nothofagus), bosque Siempreverde de Coníferas (Fitzroya) y bosque Esclerófilo (Cryptocarya). Las muestras de este último se separaron en tres fracciones de tamaño de partículas (>2,4; 2,4-1,2 y < 1,2 mm), con el fin de poner a prueba la hipótesis de la constancia de... |
| Tipo: Journal article |
Palavras-chave: Decomposition; Leaf litter; C-CO2 evolution; Temperate forests. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432006000100001 |
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| Yang,Seung Hak; Lim,Joung Soo; Khan,Modabber Ahmed; Kim,Bong Soo; Choi,Dong Yoon; Lee,Eun Young; Ahn,Hee Kwon. |
| The leachate generated by the decomposition of animal carcass has been implicated as an environmental contaminant surrounding the burial site. High-throughput nucleotide sequencing was conducted to investigate the bacterial communities in leachates from the decomposition of pig carcasses. We acquired 51,230 reads from six different samples (1, 2, 3, 4, 6 and 14 week-old carcasses) and found that sequences representing the phylum Firmicutes predominated. The diversity of bacterial 16S rRNA gene sequences in the leachate was the highest at 6 weeks, in contrast to those at 2 and 14 weeks. The relative abundance of Firmicutes was reduced, while the proportion of Bacteroidetes and Proteobacteria increased from 3–6 weeks. The representation of phyla was restored... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pig; Decomposition; Leachate; Bacterial community; Pyrosequencing. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300373 |
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| Miguel,Andressa Selestina Dalla Côrt São; Pacheco,Leandro Pereira; Carvalho,Ícaro Camargo de; Souza,Edicarlos Damacena de; Feitosa,Priscilla Barros; Petter,Fabiano André. |
| Abstract: The objective of this work was to evaluate the effect of phytomass accumulation, soil cover, and nutrient cycling promoted by cultivation systems with annual and cover crops on the grain yield of soybean sown in succession in the Cerrado, in the state of Mato Grosso, Brazil. The experiment was carried out in a randomized complete block design with nine cultivation systems and four replicates, in two crop seasons. In 2014/2015, forage grasses and legumes were evaluated, besides fallow treatments. In 2015/2016, forage and legume intercropped or not with corn or sunflower and fallow were assessed; the soybean crop was evaluated following cover crops. Phytomass, soil cover, and nutrient cycling provided by cultivation systems, as well as soybean mass... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crotalaria spectabilis; Glycine max; Pennisetum glaucum; Urochloa ruziziensis; Cover crops; Decomposition. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001001119 |
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| Registros recuperados: 38 | |
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