|
|
|
| Registros recuperados: 115 | |
|
| |
|
| |
|
|
| Gallardo,F; Bravo,C; Briceño,G; Diez,M.C. |
| Sludge from kraft mill wastewater treatment was applied on two soils derived from volcanic ashes and, the effect on biological parameters of the soils was evaluated. The soils used in this study were an Andisol belonging of Gorbea Series and an Ultisol belonging of Collipulli Series. The sludge was added at rates of 0, 10, 20, 30 and 50 t ha-1. Previously, germination of red clover (Trifolium pratense), white clover (Trifolium repens), alfalfa (Medicago sativa) and ryegrass (Lolium perenne) was tested to assess phytotoxicity of the sludge. The different soil-sludge mixtures were incubated at controlled temperature for 60 days and microbial respiration, microbial biomass carbon, fluorescein diacetate hydrolysis and acid phosphatase activity were evaluated... |
| Tipo: Journal article |
Palavras-chave: Volcanic soils; Kraft mill sludge; Phytotoxicity; Biological parameters. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000100006 |
| |
|
| |
|
| |
|
|
| Casanova P,Manuel; Luzio L,Walter; Maldonado R,Rodrigo. |
| Se realizó una correlación entre World Referente Base (WRB) y Soil Taxonomy (ST), para los suelos de la VII Región del Maule de Chile. Once Grupos de Suelos de Referencia definidos por WRB fueron identificados: Lixisols (499.965 ha), Durisols (62.539 ha). Umbrisols (62.387 ha), Phaeozems (52.823 ha), Cambisols (46.982 ha), Andosols (45.645 ha), Regosols (13.701 ha), Fluvisols (6.908 ha), Luvisols (6.132 ha), Planosols (4.606 ha) y Vertisols (640 ha). Estos suelos fueron localizados principalmente en la Depresión Intermedia (Graben Central) de Chile. Los Andosols se describieron hacia la Cordillera de los Andes y los Luxisols principalmente hacia la Cordillera de la Costa. Las correlaciones más estrechas se observaron entre Lixisols y Alfisols, Umbrisols,... |
| Tipo: Journal article |
Palavras-chave: Suelo; Clasificación; Base Mundial de Referencia; Taxonomía de Suelos. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000200002 |
| |
|
|
| Arriagada,César; Pacheco,Patricio; Pereira,Guillermo; Machuca,Angela; Alvear,Marysol; Ocampo,Juan Antonio. |
| The sewage sludge (SS) represents a source of organic matter although its increasing accumulation need a suitable environmental treatment. Our study analyzed the effect of the interaction between sewage sludge (doses 0, 2, 4, 6 and 8 g per 100 g of soil) and Eucalyptus globulus nursery seedlings inoculated with arbuscular mycorrhizal (AM) fungi as a fertilizers alternative and evaluate its effect on some soil enzyme activities. The seedlings were inoculated with Glomus claroideum, Glomus viscosum, Glomus intraradices and Glomus constrictum, establishing a uninoculated control. The sewage sludge application increased the shoot dry weight and the inoculation with G. viscosum was more effective at 6 g of SS in 100 g soil. The root colonization and succinate... |
| Tipo: Journal article |
Palavras-chave: Biological fertilisers; Glomus; Sewage sludge; Soil enzymes; Symbiosis. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000200001 |
| |
|
|
| Lakhdar,Abdelbasset; Scelza,Rosalia; Scotti,Riccardo; Rao,Maria A; Jedidi,Naceur; Gianfreda,Liliana; Abdelly,Chedly. |
| Saline soil was amended with 13.3 and 26.6 g kg-1 of Municipal Solid Waste (MSW) compost or sewage sludge, and arylsulphatase (ARY), phosphatase (PHO), dehydrogenase (DEH), (β-glucosidase ((β-GLU), urease (URE) and catalase (CAT) activities as well as physical-chemical properties were determined after 70 day of incubation under laboratory conditions. MSW compost and sewage sludge significantly improved soil physical-chemical properties, especially carbon and nitrogen contents. Accordingly, overall enzyme activities were substantially promoted in presence of both amendments and the higher increases were measured at 13.3 g kg-1 of MSW compost (increases by 107%, 43%, 20%, 11%, and 148% for, DEH, (3-GLU, PHO, URE, and CAT, respectively).... |
| Tipo: Journal article |
Palavras-chave: Biologic activities; MSW compost; Saline soil; Sewage sludge. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000100005 |
| |
|
| |
|
|
| Llona C,Miriam; Faz C,Angel. |
| Este trabajo tiene como objetivo determinar la dosis de aplicación correcta de purines de cerdo como fertilizante minimizando sus efectos contaminantes. Para ello se experimentó con un cultivo hortícola de riego representativo de la zona de estudio. La experiencia, que duró 3 años, cultivando brócoli, se realizó en 4 parcelas (630 m²) con distintas aplicaciones de purín de cerdo: sin purín y tres dosis de 4,86 L/m², 11,05 L/m² y 14,86 L/m², parcelas control, B, C y D respectivamente. Tras la experiencia, el suelo presenta incrementos importantes en N, P, K y carbono orgánico, especialmente después de sucesivas aplicaciones y en dosis altas, además, se observa un ligero aumento del pH y un descenso de la conductividad eléctrica; los oligoelementos... |
| Tipo: Journal article |
Palavras-chave: Purín de cerdo; Características físico-químicas suelo; Brócoli; Fertilizante. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912006000100005 |
| |
|
| |
|
|
| Millaleo M,Rayen; Montecinos U,Camila; Rubio H,Rosa; Contreras N,Aliro; Borie B,Fernando. |
| Los abonos orgánicos afectan características químicas y biológicas de los suelos contribuyendo a la sustentabilidad de los agroecosistemas. El objetivo del estudio fue evaluar el efecto, en condiciones de invernadero, de la adición de compost en un Ultisol sobre parámetros fúngicos como colonización radical, micelio y esporas, junto con parámetros químicos de suelo y nutricionales de tres cultivos (trigo, frejol y pradera) después de cosecha. El compost fue elaborado con desechos ganaderos y vegetales y aplicado en dosis equivalentes a 8, 20 y 30 Mg ha-1en base a materia seca. Las raíces de todos los cultivos presentaron mayor colonización de hongos micorrícicos arbusculares (HMA) con la dosis más alta, mientras que la longitud hifal fue significativamente... |
| Tipo: Journal article |
Palavras-chave: Compost; Ultisol; Leguminosa; Gramínea; Agricultura orgánica; Micorrizas arbusculares. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912006000300003 |
| |
|
|
| Vistoso G,Erika Marina; Bolán,Nanthi S; Theng,Benny K. G; Mora,María de la Luz. |
| The kinetics for the sorption of molybdate and phosphate by four Chilean Andisols have been determined. About 55%o of the molybdate and 61% of the phosphate was sorbed in the first 0.5 h, after which sorption slowly increased, reaching 90%o for molybdate and 97% for phosphate after 72 h. At the same time, OH¯ ions were released into the external solution, raising its pH by 0.85 units for molybdate and by 0.65 units in the case of phosphate. These observations indicated that both anions were sorpbed by a ligand exchange mechanims. Among the five kinetic models examined (),Table, 2 the Elovich equation gave the best fit of the experimental data (R² = 0.93 to 0.97, standard error = 0.35 to 0.94). The sorption rate constant (α) for both anions was... |
| Tipo: Journal article |
Palavras-chave: Al- and Fe-oxide; Chilean Andisols; Kinetic model; Molybdate and phosphate. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000100005 |
| |
|
| |
|
|
| Alarcón,Daniela; Ortega,Fernando; Perich,Fernando; Fernando,Pardo; Parra,Leonardo; Quiroz,Andrés. |
| Red clover (Trifolium pratense L.) is a valuable forage legume grown alone or in mixture with grasses in temperate regions of the world. Red clover is adapted to a wide range of soil types, pH levels, environmental and management conditions. However, the main limitation of this species is the lack of persistence related to the high mortality of plants. In Chile the main biotic factor affecting survival of plants is the root borer Hylastinus obscurus (Marsham) (Coleóptera; Scolytidae). In 1989, a red clover (T. pratense L.) breeding program was started at Carillanca Research Center of the Institute of Agricultural Research (INIA), Chile, with the main objectives of improving the survival of plants, forage yield and persistence. In 2002 a research line to... |
| Tipo: Journal article |
Palavras-chave: Hylastinus obscurus; Red clover; Plant population; Breeding; Dry matter yield. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000200003 |
| |
|
|
| Peredo P,Santiago F; Parada Z,Esperanza; Vega C,Marcela; Barrera S,Claudia P. |
| The aim of the present study was to determine and compare taxa richness, abundance and diversity of the edaphic mesofauna community between plantations of cranberries (Vaccinium sp.) subjected to organic and conventional management in farms in central-south Chile (37°28'S), as also to evaluate changes produced in their diversity and abundance diversity and abundance, as result of the change from conventional to organic management. In July 2006 two farms were chosen, one with one year under organic management (OM1) and a second one under six years of certified organic management (OM6). Each farm was divided in four quadrants, each one with a surface of 2,500 m . In each quadrant was extracted one sample with six replicas of 188.5 cm³ each. Samples were... |
| Tipo: Journal article |
Palavras-chave: Edaphic mesofauna; Organic farming; Conventional farming; Vaccinium sp; Mediterranean climate. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000300006 |
| |
|
| |
|
|
| Scervino,José Martín; Ponce,María Alejandra; Delia Monica,Ivana; Vierheilig,Horst; Ocampo,Juan Antonio; Godeas,Alicia. |
| We tested the effects of the flavonoid 3-methoxi-5,6,7,8-hydroxy-4'hydroxy flavone (NMHTV) isolated from shoots of non arbuscular mycorrhizal (AM) inoculated clover, and of the flavonoids 5,6,7,8-hydroxy-3-methoxy flavone (MH-1); 5,6,7,8-hydroxy-4'-hydroxy flavone (MH-2); and 5,7-hydroxy-3,4'-methoxy flavone (MH-3); isolated from AM clover {Trifolium repens) shoots, on spore germination, hyphal length, hyphal branches and the number of cluster of auxiliary cells or the number of secondary spores (Presymbiotic stage) and on the number of entry points and the percentage of AM colonized root of tomato (Lycopersicum esculentum) by the AM fungi Gigaspora rosea, Giaspora margarita, Glomus mosseae and Glomus intraradices (Symbiotic stage). Non significant effects... |
| Tipo: Journal article |
Palavras-chave: Arbuscular mycorrhizas; Flavonoids; Signal molecules; Symbiosis. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000200002 |
| |
|
|
| Figueiredo Lobo,Thomaz; Grassi Filho,Helio. |
| This study aimed to evaluate the effect of substituting chemical nitrogen (N) fertilization for equivalent N levels from sewage sludge of Wastewater Treatment Plant (WTP) on sunflower plant development. Nutrient levels in physiologically mature leaves and seeds, besides nutrient exportation during a 130-day assay, were also assessed. The experiment was carried out in 100 m² permanent plots at Sao Manuel Farm, which belongs to School of Agronomical Sciences, Sao Paulo State University-UNESP, Botucatu, Sao Paulo State, Brazil. The farm is located in the municipality of Sao Manuel, Sao Paulo State. Experimental design was in randomized blocks including 5 treatments and 5 replicates. Treatments were: Tl - chemical N fertilization according to the... |
| Tipo: Journal article |
Palavras-chave: Manure; Biosolids and nitrogen. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000300007 |
| |
|
| |
| Registros recuperados: 115 | |
|
|
|
