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Parque botánico metropolitano sur-oriente. 1ra. etapa
(Universidad de Chile, 2014)
Actividad biológica en suelos de las series Colina, Lonquén y Los Morros (Región Metropolitana), tratados con dosis crecientes de biosólidos urbanos
(Universidad de Chile, 2013)
. La incorporación de biosólidos puede afectar la actividad biológica aumentándola por la adición de carbono orgánico y nutrientes o disminuirla si el biosólido presenta altos contenidos de sales y/o elementos traza metálicos lo cual provoca un efecto...
The soil biological activity, measured as CO2 emission, depends largely on the soil organic matter content (OM). Soil biological activity plays a key role in the global carbon cycle and it is an early indicator of pollution. The incorporation of biosolids can affect the biological activity by increasing it as organic carbon and nutrients are added or by decreasing it if the biosolids has high salt contents and/or trace metals, which can create biotoxic effects. This research was aimed to determine the effect of urban biosolids applications on the biological activity of the soils. Soil samples from the soil series Colina (Fluventic Haploxerolls) Lonquén (Entic Haploxerolls) and Los Morros (Mollic Haploxeralfs) of the Metropolitan Region of Chile, were incubated for 58 days, at 28 °C (Isermeyer, 1952), with 0, 30 and 60 Mg ha-1 of biosolids. The results indicate that the more OM contents of the soil, the higher the biological activity, and the latest was significantly increased by applying increasingly higher doses of biosolids. The C-CO2 emission rate increases until 22 days of incubation and it starts to decrease due to the depletion of the labile C fraction of the soil. After 50 days, C-CO2 emission rate reaches equilibrium, and there were no significant differences among treatments. The mineralization rate on treatments with 60 Mg ha-1, does not last longer than 4 days probably due to an inhibitory effect from the microorganisms. The metallic trace element content did not increase significantly with increasing doses of biosolids, therefore, biological activity was not affected by this factor. We conclude that urban biosolids application increased labile carbon and mineralization rates and soil biological activity, favoring the loss of carbon as CO2 emissions. The kinetics of decomposition of the organic carbon constant increases according to the kinetic model of mineralization, as more biosolids are applied to the soil....
The soil biological activity, measured as CO2 emission, depends largely on the soil organic matter content (OM). Soil biological activity plays a key role in the global carbon cycle and it is an early indicator of pollution. The incorporation of biosolids can affect the biological activity by increasing it as organic carbon and nutrients are added or by decreasing it if the biosolids has high salt contents and/or trace metals, which can create biotoxic effects. This research was aimed to determine the effect of urban biosolids applications on the biological activity of the soils. Soil samples from the soil series Colina (Fluventic Haploxerolls) Lonquén (Entic Haploxerolls) and Los Morros (Mollic Haploxeralfs) of the Metropolitan Region of Chile, were incubated for 58 days, at 28 °C (Isermeyer, 1952), with 0, 30 and 60 Mg ha-1 of biosolids. The results indicate that the more OM contents of the soil, the higher the biological activity, and the latest was significantly increased by applying increasingly higher doses of biosolids. The C-CO2 emission rate increases until 22 days of incubation and it starts to decrease due to the depletion of the labile C fraction of the soil. After 50 days, C-CO2 emission rate reaches equilibrium, and there were no significant differences among treatments. The mineralization rate on treatments with 60 Mg ha-1, does not last longer than 4 days probably due to an inhibitory effect from the microorganisms. The metallic trace element content did not increase significantly with increasing doses of biosolids, therefore, biological activity was not affected by this factor. We conclude that urban biosolids application increased labile carbon and mineralization rates and soil biological activity, favoring the loss of carbon as CO2 emissions. The kinetics of decomposition of the organic carbon constant increases according to the kinetic model of mineralization, as more biosolids are applied to the soil....
Valoración de la agricultura urbana en distintos grupos humanos del Gran Santiago
(Universidad de Chile, 2017)
Parque encuentro : revitalización Parque Las Palmeras, Renca
(Universidad de Chile, 2013)
Material biobasado : residuos de la fibra textil vegetal de algodón más residuos de posconsumo domiciliario aglomerados con micelio de hongos pleurotus ostreatus
(Universidad de Chile, 2021)
dos puntos importantes: el primero es que una sola fábrica puede generar desde un 5% hasta 25% de residuos textiles pre-consumo en su producción anual total (Fashion Revolution, 2015) y el segundo es que la industria textil recicla tan solo el 1% de lo...
Saneamiento, arquitectura y paisaje en entornos ribereños : el caso del río Toltén
(Universidad de Chile, 2021)
Sistema de apoyo educativo para la comprensión del reciclaje
(Universidad de Chile, 2015)