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| Registros recuperados: 38 | |
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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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| Turchetto, Felipe; Fortes, Fabiano de Oliveira. |
| O presente estudo teve por objetivo analisar e descrever a dinâmica sazonal da deposição e decomposição de serapilheira na Floresta Estacional Decidual da região do Médio Alto Uruguai, RS. Para a determinação da deposição de serapilheira foram instalados 20 coletores de 1 m2 em uma área de um hectare, sendo realizadas avaliações mensais. Para a amostra da serapilheira acumulada nas estações sazonais, foram coletadas 20 amostras aleatórias em molduras de 25 cm x 25 cm. O material coletado foi identificado e separado nas frações: folhas, galhos e miscelânea. Após a estratificação, as amostras foram secas em estufa a 70 oC e pesadas. A deposição anual de serapilheira foi estimada em 7,14 t.ha-1, sendo composta por 58,54% de folhas, 28,69% de galhos e 12,77%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos Florestais; Engenharia Florestal; Ecologia Mineralização; Sazonalidade; Decomposição Mineralization; Seasonality; Decomposition. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/735 |
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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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| Tonieto,T.A.P.; Regitano,J.B.. |
| Green sugarcane harvesting may promote great changes in the dynamics of herbicides in the environment. Our goal was to evaluate the influence of straw decomposition degree on leaching and weed (Ipomoea grandifolia) control efficacy by (14C) tebuthiuron and hexazinone. The presence of straw on the soil surface affected leaching, mainly for hexazinone (leaching reduced from 37 to 5% of the applied amount in the presence of straw). Overall, tebuthiuron showed more efficient control of Ipomoea than hexazinone. The straw decomposition degree affected only hexazinone efficacy that was lowest for the least decomposed straw. Further studies are needed to evaluate the effects of sugarcane straw on herbicides dissipation, particularly on volatilization and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tebuthiuron; Hexazinone; Straw; Decomposition; Sugarcane; Ipomoea spp. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400016 |
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| Fairlie, Robert W.. |
| The Blinder-Oaxaca decomposition technique is widely used to identify and quantify the separate contributions of group differences in measurable characteristics, such as education, experience, marital status, and geographical differences to racial and gender gaps in outcomes. The technique cannot be used directly, however, if the outcome is binary and the coefficients are from a logit or probit model. I describe a relatively simple method of performing a decomposition that uses estimates from a logit or probit model. Expanding on the original application of the technique in Fairlie (1999), I provide a more thorough discussion of how to apply the technique, an analysis of the sensitivity of the decomposition estimates to different parameters, and the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Logit; Probit; Decomposition; Race; Gender; Discrimination; Research Methods/ Statistical Methods; C8; J7. |
| Ano: 2003 |
URL: http://purl.umn.edu/28425 |
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| Xin, Xiangfei; Qin, Fu. |
| This paper studies the regional disparity of China's agricultural productivity growth by decomposing it into technical changes, efficiency changes and input accumulation per worker. The convergence test is also used to analyze the determinants of regional disparity. The paper finds that during 1987 and 2005, although the growth of China’s agricultural labor productivity mainly depended on the accumulation of inputs, technical changes contributed more to regional disparities in agricultural productivity growth. Improving efficiency to promote TFP growth is important for agricultural labor productivity growth for the three regions—Eastern, Central and Western of China. The increase in inputs for Western China, and the improvement in technical change for... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural labor productivity growth; Decomposition; Regional disparity; Productivity Analysis. |
| Ano: 2009 |
URL: http://purl.umn.edu/51047 |
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| Joshi, P.K.; Birthal, Pratap Singh; Minot, Nicholas. |
| This study examines the sources of crop income growth in Indian agriculture over the 1980s and 1990s. Using a method developed by Minot (2003), the analysis decomposes crop income growth into the contribution of yield increases, area expansion, price increases, and diversification from low-value crops to higher-value crops. The results confirm that at the national level, technology (higher yield) was the main source of crop income growth during 1980s, while rising prices and diversification emerged as the dominant sources of growth in agriculture during 1990s. Diversification towards higher-value crops such as fruits and vegetables accounted for about 27% of crop income growth in the 1980s and 31% in the 1990s. However, these national averages hide... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Crops; Income growth; Agriculture; Grain production; Agricultural research; Research and development; High value commodities; Crop yields; Prices; High-value crops; Decomposition; Crop Production/Industries. |
| Ano: 2006 |
URL: http://purl.umn.edu/58572 |
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| GRANDI,ROSELY A.P.; GUSMÃO,LUÍS F.P.. |
| Durante o levantamento de fungos mitospóricos associados ao folhedo de Tibouchina pulchra Cogn. coletado na Reserva Biológica de Paranapiacaba (Mata Atlântica), Santo André, estado de São Paulo, vinte e dois Hyphomycetes foram isolados. As folhas passaram pela técnica da lavagem sucessiva de substratos com água destilada esterilizada e foram incubadas em câmaras-úmidas. Três espécies constituem novos registros para o Brasil, Rhinocladiella cristaspora Matsushima, Venustusynnema ciliata (Castañeda, G. Arnold & A. Guerra) Castañeda & Kendrick e Vermiculariopsiella cubensis (Castañeda) Nawawi, Kuthubutheen & Sutton; para essas são apresentadas descrições, distribuição geográfica, comentários e ilustrações. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mitosporic Fungi; Biodiversity; Decomposition; Atlantic rain forest. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000100010 |
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| Registros recuperados: 38 | |
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